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中国科学院昆明植物研究所知识管理系统
Knowledge Management System of Kunming Institute of Botany,CAS
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6 could use lots of photosynthates, but contributed little to the accumulation of biomass. 4. Photosynthetic rate of P. armeniacum decreased a little at the noon, and the highest photosynthetic rate was observed at 10:00h in the greenhouse. The variation of photosynthetic rate was in the same trend as stomatal conductance. Higher relative humidity seemed to be the key for higher photosynthetic rate in P. armeniacum. 5. The photosynthetic capacity of C. flavum was statistically larger than that of P. armeniacum. The lower leaf photosynthetic capacity of P. armeniacum was related to its lower leaf nitrogen concentration,leaf phosphorus concentration and enzyme activities. Meanwhile, the extremely lower stomatal conductance and internal mesophyll conductance might greatly limit the photosynthetic capacity of P. armeniacum. The lower stomatal conductance and photosynthetic rate of Paphiopedilum might partially caused by the lack of chloroplasts in the guard cell of Paphiopedilum. Compared with C. flavum, P. armeniacum was more fond of shade environment.6. The short longevity leaf of Cypripedium had bigger photosynthetic capacity and greater potential for fast growth. But the longer LL of Paphiopedilum enhanced nutrient conservation which could compensate its lower photosynthetic capacity. The short longevity leaf of Cypripedium usually had higher photosynthetic rate per unit leaf mass and dark respiration rate, and photosynthetic capacity decreased fast with leaf age. However, for Paphiopedilum, the situation was the opposite. 7. Compared with Cypripedium, Paphiopedilum had higher water use efficiency and lower photosynthetic nitrogen use efficiency. 8. The leaf of Paphiopedilum had higher leaf construction cost and longer repayment time than that of Cypripedium. The leaf structures and physiological functions of Paphiopedilum and Cypripedium reflected the adaptation to their habitats. The leaf morphological and physiological evolution of Paphiopedilum was related to water and resource-conserving traits in the karst habitat. The leaf traits of Cypripedium were the adaptation to the environment rich in water and nutrients but easy to change with seasons.Our results provided evidence of divergent evolution of congeneric orchids under natural 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Work of the fourth National survey on Chinese Materia Medica Resources[2017-2019]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Anatomical%2BCharacters&&fq=dc.project.title_filter%3APilot%5C+Work%5C+of%5C+the%5C+fourth%5C+National%5C+survey%5C+on%5C+Chinese%5C+Materia%5C+Medica%5C+Resources%5C%5B2017%5C-2019%5C%5D"},{"jsname":"Subtrib. Saccharinae Kuntze belongs to the tribe Andropogoneae, subfamily Panicoideae, Poaceae. There are about 156 species in the world, with 66 species occurring in China. They are distributed throughout China, mostly in the Provinces of the south and southwest. They are especially abundant in the mid and lower reaches of the Changjiang and its tributaries. A few species extend to northern China. Saccharinae grasses are usually tall, with many species being cultivated as agricultural crop plants and others possessing commercial value. In many parts of the world, selected species are currently undergoing trials as potential target plants for the exploitation of new energy sources. However, there are many taxonomic problems remaining within Saccharinae and historic studies are both incomplete and inconclusive. Problems exist and opinions differ on the systematic positioning of several genera and species. Conclusions which led to this taxonomic revision utilized the following tools and methods: field works; literature research; the study of 7069 specimens and photos from 17 herbaria; leaf anatomical experiments; analysis of the morphological characters (using statistic methodology).Generic revisions:1. Pseudopogonatherum and Eulalia are quite different in their morphology, leaf epidermis and transverse characteristics. They should be treated as two separate genera. This is consistent with the earlier opinions of Bor and S. L. Chen.2. The leaf anatomical structures and morphological characteristics in Diandranthus, Miscanthus, Triarrhena and Rubimons are almost all the same except for a few differences which exist in Rubimons. According to the result, Diandranthus, Triarrhena and Rubimons should be included in to Miscanthus as described in The Flora of China, but the subgenus Miscanthus subgen. Rubimons (B. S. Sun) Y. C. Liu et H. Peng is usefully aligned to the distinct Rubimons taxa.3. The leaf anatomical structures of Saccharum, Erianthus and Narenga show significant similarity. We agree with Clayton’s suggestion that Erianthus and Narenga should be included into Saccharum.4. The study result of leaf anatomy and morphology in Eccoilopus and Spodiopogon indicate that Eccoilopus should be included with Spodiopogon which agrees with the taxonomic treatment in Genera Graminum, Flora Yunnanica and Flora of China.On Species:1. According to the statistical research and characteristics comparison, we conclude that Microstegium reticulatum should be treated as a synonym of Microstegium vimineum; Miscanthus purpurascence should be included with Miscanthus sinensis; Saccharum arundinaceum var. trichophyllum is simply an extreme variation of Saccharum arundinaceum, and should be treated as a synonym of the latter.2. Specimens labeled as Eulalia siamensis and Eulalia wightii in Chinese herbaria are actually specimens of Eulalia quadrinervis, and specimens labeled as Imperata cylindrica var. cylindrica are in fact specimens of Imperata cylindrica var. major, which means that Eulalia siamensis, Eulalia wightii and Imperata cylindrica var. cylindrica do not occur in China.3. The specimens of Microstegium fasciculatum in Chinese herbaria have long been identified as Microstegium ciliatum. And the descriptions in Flora illustralis Plantarum Primarium Sinicarum Poaceae, Flora Reipublicae Popularis Sinicae Tomus 10(2) and Flora Yunnanica Tomus 9 were wrong in some key details. The correct description of Microstegium ciliatum is available in Flora of China Vol. 22.4. Two new species are found: Miscanthus villosus Y. C. Liu et H. Peng Sp. Nov. and Microstegium butuoense Y. C. Liu et H. Peng Sp. Nov.","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Anatomical%2BCharacters&&fq=dc.project.title_filter%3ASubtrib.%5C+Saccharinae%5C+Kuntze%5C+belongs%5C+to%5C+the%5C+tribe%5C+Andropogoneae%2C%5C+subfamily%5C+Panicoideae%2C%5C+Poaceae.%5C+There%5C+are%5C+about%5C+156%5C+species%5C+in%5C+the%5C+world%2C%5C+with%5C+66%5C+species%5C+occurring%5C+in%5C+China.%5C+They%5C+are%5C+distributed%5C+throughout%5C+China%2C%5C+mostly%5C+in%5C+the%5C+Provinces%5C+of%5C+the%5C+south%5C+and%5C+southwest.%5C+They%5C+are%5C+especially%5C+abundant%5C+in%5C+the%5C+mid%5C+and%5C+lower%5C+reaches%5C+of%5C+the%5C+Changjiang%5C+and%5C+its%5C+tributaries.%5C+A%5C+few%5C+species%5C+extend%5C+to%5C+northern%5C+China.%5C+Saccharinae%5C+grasses%5C+are%5C+usually%5C+tall%2C%5C+with%5C+many%5C+species%5C+being%5C+cultivated%5C+as%5C+agricultural%5C+crop%5C+plants%5C+and%5C+others%5C+possessing%5C+commercial%5C+value.%5C+In%5C+many%5C+parts%5C+of%5C+the%5C+world%2C%5C+selected%5C+species%5C+are%5C+currently%5C+undergoing%5C+trials%5C+as%5C+potential%5C+target%5C+plants%5C+for%5C+the%5C+exploitation%5C+of%5C+new%5C+energy%5C+sources.%5C+However%2C%5C+there%5C+are%5C+many%5C+taxonomic%5C+problems%5C+remaining%5C+within%5C+Saccharinae%5C+and%5C+historic%5C+studies%5C+are%5C+both%5C+incomplete%5C+and%5C+inconclusive.%5C+Problems%5C+exist%5C+and%5C+opinions%5C+differ%5C+on%5C+the%5C+systematic%5C+positioning%5C+of%5C+several%5C+genera%5C+and%5C+species.%5C+Conclusions%5C+which%5C+led%5C+to%5C+this%5C+taxonomic%5C+revision%5C+utilized%5C+the%5C+following%5C+tools%5C+and%5C+methods%5C%3A%5C+field%5C+works%5C%3B%5C+literature%5C+research%5C%3B%5C+the%5C+study%5C+of%5C+7069%5C+specimens%5C+and%5C+photos%5C+from%5C+17%5C+herbaria%5C%3B%5C+leaf%5C+anatomical%5C+experiments%5C%3B%5C+analysis%5C+of%5C+the%5C+morphological%5C+characters%5C+%5C%28using%5C+statistic%5C+methodology%5C%29.Generic%5C+revisions%5C%3A1.%5C+Pseudopogonatherum%5C+and%5C+Eulalia%5C+are%5C+quite%5C+different%5C+in%5C+their%5C+morphology%2C%5C+leaf%5C+epidermis%5C+and%5C+transverse%5C+characteristics.%5C+They%5C+should%5C+be%5C+treated%5C+as%5C+two%5C+separate%5C+genera.%5C+This%5C+is%5C+consistent%5C+with%5C+the%5C+earlier%5C+opinions%5C+of%5C+Bor%5C+and%5C+S.%5C+L.%5C+Chen.2.%5C+The%5C+leaf%5C+anatomical%5C+structures%5C+and%5C+morphological%5C+characteristics%5C+in%5C+Diandranthus%2C%5C+Miscanthus%2C%5C+Triarrhena%5C+and%5C+Rubimons%5C+are%5C+almost%5C+all%5C+the%5C+same%5C+except%5C+for%5C+a%5C+few%5C+differences%5C+which%5C+exist%5C+in%5C+Rubimons.%5C+According%5C+to%5C+the%5C+result%2C%5C+Diandranthus%2C%5C+Triarrhena%5C+and%5C+Rubimons%5C+should%5C+be%5C+included%5C+in%5C+to%5C+Miscanthus%5C+as%5C+described%5C+in%5C+The%5C+Flora%5C+of%5C+China%2C%5C+but%5C+the%5C+subgenus%5C+Miscanthus%5C+subgen.%5C+Rubimons%5C+%5C%28B.%5C+S.%5C+Sun%5C%29%5C+Y.%5C+C.%5C+Liu%5C+et%5C+H.%5C+Peng%5C+is%5C+usefully%5C+aligned%5C+to%5C+the%5C+distinct%5C+Rubimons%5C+taxa.3.%5C+The%5C+leaf%5C+anatomical%5C+structures%5C+of%5C+Saccharum%2C%5C+Erianthus%5C+and%5C+Narenga%5C+show%5C+significant%5C+similarity.%5C+We%5C+agree%5C+with%5C+Clayton%E2%80%99s%5C+suggestion%5C+that%5C+Erianthus%5C+and%5C+Narenga%5C+should%5C+be%5C+included%5C+into%5C+Saccharum.4.%5C+The%5C+study%5C+result%5C+of%5C+leaf%5C+anatomy%5C+and%5C+morphology%5C+in%5C+Eccoilopus%5C+and%5C+Spodiopogon%5C+indicate%5C+that%5C+Eccoilopus%5C+should%5C+be%5C+included%5C+with%5C+Spodiopogon%5C+which%5C+agrees%5C+with%5C+the%5C+taxonomic%5C+treatment%5C+in%5C+Genera%5C+Graminum%2C%5C+Flora%5C+Yunnanica%5C+and%5C+Flora%5C+of%5C+China.On%5C+Species%5C%3A1.%5C+According%5C+to%5C+the%5C+statistical%5C+research%5C+and%5C+characteristics%5C+comparison%2C%5C+we%5C+conclude%5C+that%5C+Microstegium%5C+reticulatum%5C+should%5C+be%5C+treated%5C+as%5C+a%5C+synonym%5C+of%5C+Microstegium%5C+vimineum%5C%3B%5C+Miscanthus%5C+purpurascence%5C+should%5C+be%5C+included%5C+with%5C+Miscanthus%5C+sinensis%5C%3B%5C+Saccharum%5C+arundinaceum%5C+var.%5C+trichophyllum%5C+is%5C+simply%5C+an%5C+extreme%5C+variation%5C+of%5C+Saccharum%5C+arundinaceum%2C%5C+and%5C+should%5C+be%5C+treated%5C+as%5C+a%5C+synonym%5C+of%5C+the%5C+latter.2.%5C+Specimens%5C+labeled%5C+as%5C+Eulalia%5C+siamensis%5C+and%5C+Eulalia%5C+wightii%5C+in%5C+Chinese%5C+herbaria%5C+are%5C+actually%5C+specimens%5C+of%5C+Eulalia%5C+quadrinervis%2C%5C+and%5C+specimens%5C+labeled%5C+as%5C+Imperata%5C+cylindrica%5C+var.%5C+cylindrica%5C+are%5C+in%5C+fact%5C+specimens%5C+of%5C+Imperata%5C+cylindrica%5C+var.%5C+major%2C%5C+which%5C+means%5C+that%5C+Eulalia%5C+siamensis%2C%5C+Eulalia%5C+wightii%5C+and%5C+Imperata%5C+cylindrica%5C+var.%5C+cylindrica%5C+do%5C+not%5C+occur%5C+in%5C+China.3.%5C+The%5C+specimens%5C+of%5C+Microstegium%5C+fasciculatum%5C+in%5C+Chinese%5C+herbaria%5C+have%5C+long%5C+been%5C+identified%5C+as%5C+Microstegium%5C+ciliatum.%5C+And%5C+the%5C+descriptions%5C+in%5C+Flora%5C+illustralis%5C+Plantarum%5C+Primarium%5C+Sinicarum%5C+Poaceae%2C%5C+Flora%5C+Reipublicae%5C+Popularis%5C+Sinicae%5C+Tomus%5C+10%5C%282%5C%29%5C+and%5C+Flora%5C+Yunnanica%5C+Tomus%5C+9%5C+were%5C+wrong%5C+in%5C+some%5C+key%5C+details.%5C+The%5C+correct%5C+description%5C+of%5C+Microstegium%5C+ciliatum%5C+is%5C+available%5C+in%5C+Flora%5C+of%5C+China%5C+Vol.%5C+22.4.%5C+Two%5C+new%5C+species%5C+are%5C+found%5C%3A%5C+Miscanthus%5C+villosus%5C+Y.%5C+C.%5C+Liu%5C+et%5C+H.%5C+Peng%5C+Sp.%5C+Nov.%5C+and%5C+Microstegium%5C+butuoense%5C+Y.%5C+C.%5C+Liu%5C+et%5C+H.%5C+Peng%5C+Sp.%5C+Nov."},{"jsname":"The Taxus wallichiana complex represents an old relict conifer lineage that survived through the Tertiary. It is currently distributed in the mountain forests in South and Southwest China south of the Qinling Mountains. In the present study, we explored phylogeography of the complex by using two chloroplast DNA regions, one nuclear ribosomal DNA spacer region and eight microsatellite (SSR) loci. The main conclusions can be summarized as follows:1. Phylogeographic pattern based on chloroplast haplotypes，There were 11 cpDNA haplotypes identified in the T. wallichiana complex The complex showed a high level of genetic diversity and obvious genetic differentiation. The 44 sampled populations showed obvious genetic structure, which could be divided into five groups, namely the Huanan group, the Daba group, the Emei group, the Yunnan group and the Qinling group. There was extremely high genetic differentiation among groups, but not significant within group. The divergence times of the five lineages, estimated using average mutation rates of trnL-trnF, fell in the Pliocene. 2. Phylogeographic patterns based on ITS sequences，These included 38 unique ‘haplotypes’ based on ITS data. Their analysis showed that the T. wallichiana complex possessed a high genetic diversity. These populations could be divided into four groups, namely the Huanan group, the Daba/Emei group, the Yunnan group and the Qinling group. Based on all results, it appears that the major lineages constituting the T. wallichiana complex have arisen before Quaternary glaciation cycles, and may have survived isolated in different refugia. During interglacial periods some lineages appear to have come in contact and hybridizedbut other lineages merged forming populations with mixed haplotypes without signs of hybridization. The present-day phylogeographical distribution pattern of the T. wallichiana complex might thus be the result of repeated expansion / contractions of populations during interglacial / glacial cycles.3. Population genetic analysis using microsatellite (SSR) markers，Eight SSR loci were used for population genetic analysis on the T. wallichiana complex. A lower level of genetic diversity at the population level and high genetic differentiation among population was detected. The results of structure analysis were similar to those on the ITS data, dividing the populations into four groups (lineages). According to the results here, it was deduced that each of the 4 lineages of the T. wallichiana complex may possessed respective glacial refugia, and some lineages (such as the Qinling and Huanan lineage) might have survived in multiple refugia in the Quaternay glaciations. The present distribution pattern of this complex was likely influenced by the uplift of the QTP and Quaternary glaciation.","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Anatomical%2BCharacters&&fq=dc.project.title_filter%3AThe%5C+Taxus%5C+wallichiana%5C+complex%5C+represents%5C+an%5C+old%5C+relict%5C+conifer%5C+lineage%5C+that%5C+survived%5C+through%5C+the%5C+Tertiary.%5C+It%5C+is%5C+currently%5C+distributed%5C+in%5C+the%5C+mountain%5C+forests%5C+in%5C+South%5C+and%5C+Southwest%5C+China%5C+south%5C+of%5C+the%5C+Qinling%5C+Mountains.%C2%A0In%5C+the%5C+present%5C+study%2C%5C+we%5C+explored%5C+phylogeography%5C+of%5C+the%5C+complex%5C+by%5C+using%5C+two%5C+chloroplast%5C+DNA%5C+regions%2C%5C+one%5C+nuclear%5C+ribosomal%5C+DNA%5C+spacer%5C+region%5C+and%5C+eight%5C+microsatellite%5C+%5C%28SSR%5C%29%5C+loci.%5C+The%5C+main%5C+conclusions%5C+can%5C+be%5C+summarized%5C+as%5C+follows%5C%3A1.%5C+Phylogeographic%5C+pattern%5C+based%5C+on%5C+chloroplast%5C+haplotypes%EF%BC%8CThere%5C+were%5C+11%5C+cpDNA%5C+haplotypes%5C+identified%5C+in%5C+the%5C+T.%5C+wallichiana%5C+complex%5C+The%5C+complex%5C+showed%5C+a%5C+high%5C+level%5C+of%5C+genetic%5C+diversity%5C+and%5C+obvious%5C+genetic%5C+differentiation.%5C+The%5C+44%5C+sampled%5C+populations%5C+showed%5C+obvious%5C+genetic%5C+structure%2C%5C+which%5C+could%5C+be%5C+divided%5C+into%5C+five%5C+groups%2C%5C+namely%5C+the%5C+Huanan%5C+group%2C%5C+the%5C+Daba%5C+group%2C%5C+the%5C+Emei%5C+group%2C%5C+the%5C+Yunnan%5C+group%5C+and%5C+the%5C+Qinling%5C+group.%5C+There%5C+was%5C+extremely%5C+high%5C+genetic%5C+differentiation%5C+among%5C+groups%2C%5C+but%5C+not%5C+significant%5C+within%5C+group.%5C+The%5C+divergence%5C+times%5C+of%5C+the%5C+five%5C+lineages%2C%5C+estimated%5C+using%5C+average%5C+mutation%5C+rates%5C+of%5C+trnL%5C-trnF%2C%5C+fell%5C+in%5C+the%5C+Pliocene.%C2%A02.%5C+Phylogeographic%5C+patterns%5C+based%5C+on%5C+ITS%5C+sequences%EF%BC%8CThese%5C+included%5C+38%5C+unique%5C+%E2%80%98haplotypes%E2%80%99%5C+based%5C+on%5C+ITS%5C+data.%5C+Their%5C+analysis%5C+showed%5C+that%5C+the%5C+T.%5C+wallichiana%5C+complex%5C+possessed%5C+a%5C+high%5C+genetic%5C+diversity.%C2%A0These%5C+populations%5C+could%5C+be%5C+divided%5C+into%5C+four%5C+groups%2C%5C+namely%5C+the%5C+Huanan%5C+group%2C%5C+the%5C+Daba%5C%2FEmei%5C+group%2C%5C+the%5C+Yunnan%5C+group%5C+and%5C+the%5C+Qinling%5C+group.%5C+Based%5C+on%5C+all%5C+results%2C%5C+it%5C+appears%5C+that%5C+the%5C+major%5C+lineages%5C+constituting%5C+the%5C+T.%5C+wallichiana%5C+complex%5C+have%5C+arisen%5C+before%5C+Quaternary%5C+glaciation%5C+cycles%2C%5C+and%5C+may%5C+have%5C+survived%5C+isolated%5C+in%5C+different%5C+refugia.%5C+During%5C+interglacial%5C+periods%5C+some%5C+lineages%5C+appear%5C+to%5C+have%5C+come%5C+in%5C+contact%5C+and%5C+hybridizedbut%5C+other%5C+lineages%5C+merged%5C+forming%5C+populations%5C+with%5C+mixed%5C+haplotypes%5C+without%5C+signs%5C+of%5C+hybridization.%5C+The%5C+present%5C-day%5C+phylogeographical%5C+distribution%5C+pattern%5C+of%5C+the%5C+T.%5C+wallichiana%5C+complex%5C+might%5C+thus%5C+be%5C+the%5C+result%5C+of%5C+repeated%5C+expansion%5C+%5C%2F%5C+contractions%5C+of%5C+populations%5C+during%5C+interglacial%5C+%5C%2F%5C+glacial%5C+cycles.3.%5C+Population%5C+genetic%5C+analysis%5C+using%5C+microsatellite%5C+%5C%28SSR%5C%29%5C+markers%EF%BC%8CEight%5C+SSR%5C+loci%5C+were%5C+used%5C+for%5C+population%5C+genetic%5C+analysis%5C+on%5C+the%5C+T.%5C+wallichiana%5C+complex.%5C+A%5C+lower%5C+level%5C+of%5C+genetic%5C+diversity%5C+at%5C+the%5C+population%5C+level%5C+and%5C+high%5C+genetic%5C+differentiation%5C+among%5C+population%5C+was%5C+detected.%5C+The%5C+results%5C+of%5C+structure%5C+analysis%5C+were%5C+similar%5C+to%5C+those%5C+on%5C+the%5C+ITS%5C+data%2C%5C+dividing%5C+the%5C+populations%5C+into%5C+four%5C+groups%5C+%5C%28lineages%5C%29.%C2%A0According%5C+to%5C+the%5C+results%5C+here%2C%5C+it%5C+was%5C+deduced%5C+that%5C+each%5C+of%5C+the%5C+4%5C+lineages%5C+of%5C+the%5C+T.%5C+wallichiana%5C+complex%5C+may%5C+possessed%5C+respective%5C+glacial%5C+refugia%2C%5C+and%5C+some%5C+lineages%5C+%5C%28such%5C+as%5C+the%5C+Qinling%5C+and%5C+Huanan%5C+lineage%5C%29%5C+might%5C+have%5C+survived%5C+in%5C+multiple%5C+refugia%5C+in%5C+the%5C+Quaternay%5C+glaciations.%5C+The%5C+present%5C+distribution%5C+pattern%5C+of%5C+this%5C+complex%5C+was%5C+likely%5C+influenced%5C+by%5C+the%5C+uplift%5C+of%5C+the%5C+QTP%5C+and%5C+Quaternary%5C+glaciation."},{"jsname":"The relationship between leaf physiognomy and climate is widely used to reconstruct paleoclimates of Cenozoic floras. Previous works demonstrate that LMA show regional constraints. Until now, no equation has been set up directly from Chinese forests. This relationship is exhaustively studied based on 50 samples from mesic to humid forests across China. Models including Leaf Margin Analysis (LMA), Single Linear regression for Precipitation, and Climate Leaf Analysis Multivariate Program (CLAMP), are set up and used to quantitatively reconstruct paleoclimates of Chinese Neogene floras. Meanwhile, a paleoflora, i.e., Yangjie flora, which belongs to the Upper Pliocene Sanying formation in West Yunnan Province, is studied. The species assemblage, paleoclimate and paleoecology of Yangjie flora are discussed. Conclusions in this dissertation are as following: 1. Chinese leaf physiognomy-climate models based on regression analyses，LMA is a widely used method that applies present-day linear correlation between the proportion of woody dicotyledonous species with untoothed leaves (P) and mean annual temperature (MAT) to estimate paleotemperatures from fossil leaf floras. The Chinese data indicate that P shows a strong linear correlation with MAT, but the actual relationship is slightly different from those recognized from other regions. Among all currently used LMA equations, the one resulting from North and Central American and Japanese data, rather than the widely used East Asian LMA equation, yields the closest values to the actual MATs of the Chinese samples (mean absolute error = 1.9°C). A new equation derived from the Chinese forests is therefore developed, where MAT = 1.038 + 27.6 × P. This study not only demonstrates the similarity of the relationship between P and MAT in the Northern Hemisphere, but also improves the reliability of LMA for paleoclimate reconstructions of Chinese paleofloras. Besides, regression analyses are used to explore the relationship between leaf physiognomy and precipitation. In contrast to former studies, entire leaf margin shows the highest correlation with the Growing Season Precipitation (GSP). A new equation is proposed: GSP = 228.0 + 1707.0 × P. 2. The new calibrated CLAMP dataset – PHYSGCHINA，CLAMP, which is based on canonical correspondence analysis, is improved by the inclusion of 50 Chinese samples. The result indicates that, new calibrated data from 50 Chinese sample sites are situated away from the former 144 samples in the physiognomic space, which may be caused by the unique characters of leaf physiognomy under monsoon condition. Therefore, a new calibrated CLAMP dataset, i.e., PHYSGCHINA, is set up based on 50 new Chinese samples, and 144 former samples from PHYSG3BRC. This new dataset could improve the accuracy of paleoclimate reconstructions for floras under the monsoon climate condition. When it is applied to Chinese Neogene floras, PHYSGCHINA could improve the accuracy of paleoclimate parameters, especially parameters related to precipitation. 3. Paleoclimate reconstructions of Chinese Cenozoic floras，Paleoclimates of Chinese Cenozoic floras are reconstructed using leaf physiognomy- climate models being set up in this study. The Chinese paleoclimate history in Eocene is similar to the trend from worldwide record. That is, hot climate presented in early Eocene and early Middle Eocene, and then, climate cooled down from late Middle Eocene to Late Eocene in China. Moreover, paleoclimates of two Late Miocene floras from Yunnan province, i.e., Xiaolongtan flora and Bangmai flora, are reconstructed using different models. The results indicate that, temperature of Yunnan is slightly higher than that in nowadays, but the precipitation is much higher than that at present day, which may be caused by the uplift of Hengduan Mountain. 4. Late Pliocene Yangjie flora in West Yunnan Province, China，A Late Pliocene Yangjie flora form Yongping County, western Yunnan province, which belongs to Sanying formation, is studied in this dissertation. Yangjie flora is dominated by Quercus sect. Heterobalanus (Oerst.) Menits. (evergreen sclerophyllous oaks), and this forest type is quite common in SW China at present. The discovery of Yangjie flora provides evidence that, vegetations of Yunnan in Miocene were dominated by evergreen forests, and the dominant families were Fabaceae, Fagaceae and Lauraceae. In Pliocene, this vegetation type changed gradually to evergreen sclerophyllous oak forests. This vegetation change may have been caused by the uplift of Hengduan Mountain in Neogene. A polypodiaceous fern, Drynaria callispora sp. nov., is described from the upper Pliocene Sanying Formation in western Yunnan Province, southwestern China. The species with well-preserved pinnae and in situ spores is the first convincing Drynaria fossil record. Detailed morphological investigation reveals that D. callispora is characterized by 1) pinnatifid fronds with entire-margined pinnae having straight or zigzag secondary veins; 2) finer venation showing void quadrangular areoles, but occasionally with one unbranched veinlet; 3) one row of circular sori on each side of the strong primary vein; and 4) in situ spores with verrucate exospores elliptical in polar view and bean-shaped in equatorial view. A morphological comparison shows that D. callispora is significantly different from all the fossil species previously identified as drynarioids. A phylogenetic analysis of D. callispora supports that the fossil is closely related to D. sinica Diels and D. mollis Bedd., two extant species distributing in the Himalayas. The discovery of the new fern indicates that the genus Drynaria became diversified in its modern distribution region no later than the late Pliocene and had retained the similar ecology to that of many modern drynarioid ferns ever since. 5. Paleoclimate reconstruction of Yangjie flora，LMA, Single Linear Regression for Precipitation and PHYSGCHINA are applied to reconstruct paleoclimate of Yangjie flora. MAT calculated by LMA and CLAMP is 22.0 ± 2.4°C and 20.0 ± 1.4°C, respectively, and GSP calculated by Single Linear Regression for Precipitation and PHYSGCHINA is 1521.9 ± 131.3 mm and 2084.7 ± 223.1 mm, respectively All methods agree that, both temperature and precipitation were higher in Late Pliocene than in nowadays. Meanwhile, precipitation parameters calculated by CLAMP gets high values. 6. Preliminary study of insect herbivory in Yangjie flora，Insect herbivory on leaves of Quercus preguyavaefolia Tao and Q. presenescens Zhou, two dominant species in Yangjie flora, is reported by the preliminary research. Each of these two species has a high diversity of insect damage. Among all damage types, margin feeding and surface feeding are most common, and skeletonization, piercing and sucking, and galling are less found. Most of these damage types belonge to the high host specialization (HS = 1). However, the proportion of leaves without insect damage in Q. presenescens is much higher than that in Q. preguyavaefolia. According to the log-log linear regression model, both Quercus preguyavaefolia and Q. presenescens have very high leaf mass per area (with 184.8 ± 6.7 g/m2 and 155.3 ± 10.7 g/m2, respectively). The high diversity of insect herbivory demonstrates a warm climate in the Late Pliocene of West Yunnan Province.","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Anatomical%2BCharacters&&fq=dc.project.title_filter%3AThe%5C+relationship%5C+between%5C+leaf%5C+physiognomy%5C+and%5C+climate%5C+is%5C+widely%5C+used%5C+to%5C+reconstruct%5C+paleoclimates%5C+of%5C+Cenozoic%5C+floras.%5C+Previous%5C+works%5C+demonstrate%5C+that%5C+LMA%5C+show%5C+regional%5C+constraints.%5C+Until%5C+now%2C%5C+no%5C+equation%5C+has%5C+been%5C+set%5C+up%5C+directly%5C+from%5C+Chinese%5C+forests.%5C+This%5C+relationship%5C+is%5C+exhaustively%5C+studied%5C+based%5C+on%5C+50%5C+samples%5C+from%5C+mesic%5C+to%5C+humid%5C+forests%5C+across%5C+China.%5C+Models%5C+including%5C+Leaf%5C+Margin%5C+Analysis%5C+%5C%28LMA%5C%29%2C%5C+Single%5C+Linear%5C+regression%5C+for%5C+Precipitation%2C%5C+and%5C+Climate%5C+Leaf%5C+Analysis%5C+Multivariate%5C+Program%5C+%5C%28CLAMP%5C%29%2C%5C+are%5C+set%5C+up%5C+and%5C+used%5C+to%5C+quantitatively%5C+reconstruct%5C+paleoclimates%5C+of%5C+Chinese%5C+Neogene%5C+floras.%5C+Meanwhile%2C%5C+a%5C+paleoflora%2C%5C+i.e.%2C%5C+Yangjie%5C+flora%2C%5C+which%5C+belongs%5C+to%5C+the%5C+Upper%5C+Pliocene%5C+Sanying%5C+formation%5C+in%5C+West%5C+Yunnan%5C+Province%2C%5C+is%5C+studied.%5C+The%5C+species%5C+assemblage%2C%5C+paleoclimate%5C+and%5C+paleoecology%5C+of%5C+Yangjie%5C+flora%5C+are%5C+discussed.%5C+Conclusions%5C+in%5C+this%5C+dissertation%5C+are%5C+as%5C+following%5C%3A%5C+1.%5C+Chinese%5C+leaf%5C+physiognomy%5C-climate%5C+models%5C+based%5C+on%5C+regression%5C+analyses%EF%BC%8CLMA%5C+is%5C+a%5C+widely%5C+used%5C+method%5C+that%5C+applies%5C+present%5C-day%5C+linear%5C+correlation%5C+between%5C+the%5C+proportion%5C+of%5C+woody%5C+dicotyledonous%5C+species%5C+with%5C+untoothed%5C+leaves%5C+%5C%28P%5C%29%5C+and%5C+mean%5C+annual%5C+temperature%5C+%5C%28MAT%5C%29%5C+to%5C+estimate%5C+paleotemperatures%5C+from%5C+fossil%5C+leaf%5C+floras.%5C+The%5C+Chinese%5C+data%5C+indicate%5C+that%5C+P%5C+shows%5C+a%5C+strong%5C+linear%5C+correlation%5C+with%5C+MAT%2C%5C+but%5C+the%5C+actual%5C+relationship%5C+is%5C+slightly%5C+different%5C+from%5C+those%5C+recognized%5C+from%5C+other%5C+regions.%5C+Among%5C+all%5C+currently%5C+used%5C+LMA%5C+equations%2C%5C+the%5C+one%5C+resulting%5C+from%5C+North%5C+and%5C+Central%5C+American%5C+and%5C+Japanese%5C+data%2C%5C+rather%5C+than%5C+the%5C+widely%5C+used%5C+East%5C+Asian%5C+LMA%5C+equation%2C%5C+yields%5C+the%5C+closest%5C+values%5C+to%5C+the%5C+actual%5C+MATs%5C+of%5C+the%5C+Chinese%5C+samples%5C+%5C%28mean%5C+absolute%5C+error%5C+%3D%5C+1.9%C2%B0C%5C%29.%5C+A%5C+new%5C+equation%5C+derived%5C+from%5C+the%5C+Chinese%5C+forests%5C+is%5C+therefore%5C+developed%2C%5C+where%5C+MAT%5C+%3D%5C+1.038%5C+%5C%2B%5C+27.6%5C+%C3%97%5C+P.%5C+This%5C+study%5C+not%5C+only%5C+demonstrates%5C+the%5C+similarity%5C+of%5C+the%5C+relationship%5C+between%5C+P%5C+and%5C+MAT%5C+in%5C+the%5C+Northern%5C+Hemisphere%2C%5C+but%5C+also%5C+improves%5C+the%5C+reliability%5C+of%5C+LMA%5C+for%5C+paleoclimate%5C+reconstructions%5C+of%5C+Chinese%5C+paleofloras.%5C+Besides%2C%5C+regression%5C+analyses%5C+are%5C+used%5C+to%5C+explore%5C+the%5C+relationship%5C+between%5C+leaf%5C+physiognomy%5C+and%5C+precipitation.%5C+In%5C+contrast%5C+to%5C+former%5C+studies%2C%5C+entire%5C+leaf%5C+margin%5C+shows%5C+the%5C+highest%5C+correlation%5C+with%5C+the%5C+Growing%5C+Season%5C+Precipitation%5C+%5C%28GSP%5C%29.%5C+A%5C+new%5C+equation%5C+is%5C+proposed%5C%3A%5C+GSP%5C+%3D%5C+228.0%5C+%5C%2B%5C+1707.0%5C+%C3%97%5C+P.%5C+2.%5C+The%5C+new%5C+calibrated%5C+CLAMP%5C+dataset%5C+%E2%80%93%5C+PHYSGCHINA%EF%BC%8CCLAMP%2C%5C+which%5C+is%5C+based%5C+on%5C+canonical%5C+correspondence%5C+analysis%2C%5C+is%5C+improved%5C+by%5C+the%5C+inclusion%5C+of%5C+50%5C+Chinese%5C+samples.%5C+The%5C+result%5C+indicates%5C+that%2C%5C+new%5C+calibrated%5C+data%5C+from%5C+50%5C+Chinese%5C+sample%5C+sites%5C+are%5C+situated%5C+away%5C+from%5C+the%5C+former%5C+144%5C+samples%5C+in%5C+the%5C+physiognomic%5C+space%2C%5C+which%5C+may%5C+be%5C+caused%5C+by%5C+the%5C+unique%5C+characters%5C+of%5C+leaf%5C+physiognomy%5C+under%5C+monsoon%5C+condition.%5C+Therefore%2C%5C+a%5C+new%5C+calibrated%5C+CLAMP%5C+dataset%2C%5C+i.e.%2C%5C+PHYSGCHINA%2C%5C+is%5C+set%5C+up%5C+based%5C+on%5C+50%5C+new%5C+Chinese%5C+samples%2C%5C+and%5C+144%5C+former%5C+samples%5C+from%5C+PHYSG3BRC.%5C+This%5C+new%5C+dataset%5C+could%5C+improve%5C+the%5C+accuracy%5C+of%5C+paleoclimate%5C+reconstructions%5C+for%5C+floras%5C+under%5C+the%5C+monsoon%5C+climate%5C+condition.%5C+When%5C+it%5C+is%5C+applied%5C+to%5C+Chinese%5C+Neogene%5C+floras%2C%5C+PHYSGCHINA%5C+could%5C+improve%5C+the%5C+accuracy%5C+of%5C+paleoclimate%5C+parameters%2C%5C+especially%5C+parameters%5C+related%5C+to%5C+precipitation.%5C+3.%5C+Paleoclimate%5C+reconstructions%5C+of%5C+Chinese%5C+Cenozoic%5C+floras%EF%BC%8CPaleoclimates%5C+of%5C+Chinese%5C+Cenozoic%5C+floras%5C+are%5C+reconstructed%5C+using%5C+leaf%5C+physiognomy%5C-%5C+climate%5C+models%5C+being%5C+set%5C+up%5C+in%5C+this%5C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doichangensis is an endangered plant. In this paper, the megasporogenesis and development of female gametophyte, seed morphological traits and seed germination, seed conservation, micropropagation and acclimatization of this species were studied. Combined with the published results of cytology, molecular genetics and other researches,the mechanisms of extinction, basic biology and technology of germplasm conservation and acclimatization of T. doichangensis were discussed. The main results are summarized as follows:1. Megasporogenesis and development of female gametophyte，Stamens exist under the stigma of T. doichangensis, and the pollen is aborted on the later development stage of pistil, therefore, the pistillate flower in function is hermaphrodite flower in morphology. The ovule is anatropous, bitegmic and crassinucellate. The primary archesporium is hypodermal and single-celled and the sporogenous cell of the nucellus functions directly as a megaspore mother cell which goes meiosis to form a linear tetrad. The chalazal megaspore of the tetrad is functional. The development of embryo sac conforms to the polygonum type. There are six ovules in the ovary of T. doichangensis, and only one develops into a seed in normal fruits. In the process of megasporogenesis and development of female gametophyte, there are several links of abortion, and 93.3% of mature embryo sacs is aborted.2. Morphological characters and germination of seeds，Most of the variation occurred among individual trees within populations in seed morphological traits (length, width and 1000-seed weight) and germination-related indices (germination percentage, germination index and vigor index). In addition, the variation in percentage of well-developed seeds among populations and among individual trees within populations is equal, each accounting for 48%. Each of seed morphological traits has significantly positive correlation with each other (p < 0.01), but they have no significant correlation with percentage of well-developed seeds and germination-related indices. In the same batch of seeds of T. doichangensis, there are light-colored and dark-colored seed coats, and development of light-colored seeds is significantly poorer than that of dark-colored seeds.The sensitivity of seeds to high temperature varys in different stages of seed imbibition. In each stage, heat acclimatization don’t increase germination percentage, germination index and fresh weight of seedlings. If the distilled water is substituted by solution of SA during seed imbibition, seed germination and germination index after heat shock are not significantly different from control, but they are significantly higher than that of other treatments. Moreover, when the seeds are treatmented with SA, the fresh weight of seedlings is significantly higher than that of control and other treatments.3. Seed conservation，Seeds of T. doichangensis belong to orthodox seeds which can tolerate certain level of dehydration. The condition of low temperature and low water content of seeds is conducive to seed conservation.Germination of fresh seeds shows significant variation among populations, howerer, germination of the seeds after storage for one year in room temperature shows no significant variation among populations.High temperature and high relative humidity damages the seeds more severely than high temperature does. In addition, low water content of seeds enable the seeds to be more tolerant to high temperature.The electrical conductivity, dehydrogenase activity and germination percentage have no significant correlation with each other.4. Micropropagation and in vitro conservation，Cotyledonary nodes are a kind of efficient explants. Low salt media are conducive to shoot propagation and root induction.The maximum multiplication rate (20-25 shoots/explant within 4 months) is achieved on quarter-strength Murashige and Skoog (1/4 MS) medium supplemented with 1 mg·L-1 6-benzyladenine (6-BA) and 0.05 mg·L-1 α-naphthaleneacetic acid (NAA).Rooting is promoted by auxins, however, IBA alone or low concentrations of NAA are preferable due to small amount of callus induced. The research has established an efficient protocol for micropropagation of T. doichangensis, and it provides technology support for in vitro conservation of special germplasm of the species.5. Acclimatization，Quercus variabilis, Cyclobalanopsis glaucoides and T. doichangensis belong to the family of Fagaceae, and the natural distribution ranges of the 3 species are decreasing in turn. The research suggests that the ranges of temperature tolerance of the 3 species are decreasing corresponding to their distribution ranges.The high and low semi-lethal temperature of one-year old T. doichangensis is 49.5℃ and -5℃ respectively. It suggests that T. doichangensis has a wide range of basic temperature tolerance. Short-term heat and cold acclimatization cannot expand the range of temperature tolerance. It can be inferred that T. doichangensis may lack induced tolerance to temperature. Under proper conditions, ABA can increase the cold tolerance, and SA can increase the heat tolerance of leaf discs of T. doichangensis.","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Anatomical%2BCharacters&&fq=dc.project.title_filter%3ATrigonobalanus%5C+doichangensis%5C+is%5C+an%5C+endangered%5C+plant.%5C+In%5C+this%5C+paper%2C%5C+the%5C+megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%2C%5C+seed%5C+morphological%5C+traits%5C+and%5C+seed%5C+germination%2C%5C+seed%5C+conservation%2C%5C+micropropagation%5C+and%5C+acclimatization%5C+of%5C+this%5C+species%5C+were%5C+studied.%5C+Combined%5C+with%5C+the%5C+published%5C+results%5C+of%5C+cytology%2C%5C+molecular%5C+genetics%5C+and%5C+other%5C+researches%2Cthe%5C+mechanisms%5C+of%5C+extinction%2C%5C+basic%5C+biology%5C+and%5C+technology%5C+of%5C+germplasm%5C+conservation%5C+and%5C+acclimatization%5C+of%5C+T.%5C+doichangensis%5C+were%5C+discussed.%5C+The%5C+main%5C+results%5C+are%5C+summarized%5C+as%5C+follows%5C%3A1.%5C+Megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%EF%BC%8CStamens%5C+exist%5C+under%5C+the%5C+stigma%5C+of%5C+T.%5C+doichangensis%2C%5C+and%5C+the%5C+pollen%5C+is%5C+aborted%5C+on%5C+the%5C+later%5C+development%5C+stage%5C+of%5C+pistil%2C%5C+therefore%2C%5C+the%5C+pistillate%5C+flower%5C+in%5C+function%5C+is%5C+hermaphrodite%5C+flower%5C+in%5C+morphology.%5C+The%5C+ovule%5C+is%5C+anatropous%2C%5C+bitegmic%5C+and%5C+crassinucellate.%5C+The%5C+primary%5C+archesporium%5C+is%5C+hypodermal%5C+and%5C+single%5C-celled%5C+and%5C+the%5C+sporogenous%5C+cell%5C+of%5C+the%5C+nucellus%5C+functions%5C+directly%5C+as%5C+a%5C+megaspore%5C+mother%5C+cell%5C+which%5C+goes%5C+meiosis%5C+to%5C+form%5C+a%5C+linear%5C+tetrad.%5C+The%5C+chalazal%5C+megaspore%5C+of%5C+the%5C+tetrad%5C+is%5C+functional.%5C+The%5C+development%5C+of%5C+embryo%5C+sac%5C+conforms%5C+to%5C+the%5C+polygonum%5C+type.%5C+There%5C+are%5C+six%5C+ovules%5C+in%5C+the%5C+ovary%5C+of%5C+T.%5C+doichangensis%2C%5C+and%5C+only%5C+one%5C+develops%5C+into%5C+a%5C+seed%5C+in%5C+normal%5C+fruits.%5C+In%5C+the%5C+process%5C+of%5C+megasporogenesis%5C+and%5C+development%5C+of%5C+female%5C+gametophyte%2C%5C+there%5C+are%5C+several%5C+links%5C+of%5C+abortion%2C%5C+and%5C+93.3%25%5C+of%5C+mature%5C+embryo%5C+sacs%5C+is%5C+aborted.2.%5C+Morphological%5C+characters%5C+and%5C+germination%5C+of%5C+seeds%EF%BC%8CMost%5C+of%5C+the%5C+variation%5C+occurred%5C+among%5C+individual%5C+trees%5C+within%5C+populations%5C+in%5C+seed%5C+morphological%5C+traits%5C+%5C%28length%2C%5C+width%5C+and%5C+1000%5C-seed%5C+weight%5C%29%5C+and%5C+germination%5C-related%5C+indices%5C+%5C%28germination%5C+percentage%2C%5C+germination%5C+index%5C+and%5C+vigor%5C+index%5C%29.%5C+In%5C+addition%2C%5C+the%5C+variation%5C+in%5C+percentage%5C+of%5C+well%5C-developed%5C+seeds%5C+among%5C+populations%5C+and%5C+among%5C+individual%5C+trees%5C+within%5C+populations%5C+is%5C+equal%2C%5C+each%5C+accounting%5C+for%5C+48%25.%5C+Each%5C+of%5C+seed%5C+morphological%5C+traits%5C+has%5C+significantly%5C+positive%5C+correlation%5C+with%5C+each%5C+other%5C+%5C%28p%5C+%3C%5C+0.01%5C%29%2C%5C+but%5C+they%5C+have%5C+no%5C+significant%5C+correlation%5C+with%5C+percentage%5C+of%5C+well%5C-developed%5C+seeds%5C+and%5C+germination%5C-related%5C+indices.%5C+In%5C+the%5C+same%5C+batch%5C+of%5C+seeds%5C+of%5C+T.%5C+doichangensis%2C%5C+there%5C+are%5C+light%5C-colored%5C+and%5C+dark%5C-colored%5C+seed%5C+coats%2C%5C+and%5C+development%5C+of%5C+light%5C-colored%5C+seeds%5C+is%5C+significantly%5C+poorer%5C+than%5C+that%5C+of%5C+dark%5C-colored%5C+seeds.The%5C+sensitivity%5C+of%5C+seeds%5C+to%5C+high%5C+temperature%5C+varys%5C+in%5C+different%5C+stages%5C+of%5C+seed%5C+imbibition.%5C+In%5C+each%5C+stage%2C%5C+heat%5C+acclimatization%5C+don%E2%80%99t%5C+increase%5C+germination%5C+percentage%2C%5C+germination%5C+index%5C+and%5C+fresh%5C+weight%5C+of%5C+seedlings.%5C+If%5C+the%5C+distilled%5C+water%5C+is%5C+substituted%5C+by%5C+solution%5C+of%5C+SA%5C+during%5C+seed%5C+imbibition%2C%5C+seed%5C+germination%5C+and%5C+germination%5C+index%5C+after%5C+heat%5C+shock%5C+are%5C+not%5C+significantly%5C+different%5C+from%5C+control%2C%5C+but%5C+they%5C+are%5C+significantly%5C+higher%5C+than%5C+that%5C+of%5C+other%5C+treatments.%5C+Moreover%2C%5C+when%5C+the%5C+seeds%5C+are%5C+treatmented%5C+with%5C+SA%2C%5C+the%5C+fresh%5C+weight%5C+of%5C+seedlings%5C+is%5C+significantly%5C+higher%5C+than%5C+that%5C+of%5C+control%5C+and%5C+other%5C+treatments.3.%5C+Seed%5C+conservation%EF%BC%8CSeeds%5C+of%5C+T.%5C+doichangensis%5C+belong%5C+to%5C+orthodox%5C+seeds%5C+which%5C+can%5C+tolerate%5C+certain%5C+level%5C+of%5C+dehydration.%5C+The%5C+condition%5C+of%5C+low%5C+temperature%5C+and%5C+low%5C+water%5C+content%5C+of%5C+seeds%5C+is%5C+conducive%5C+to%5C+seed%5C+conservation.Germination%5C+of%5C+fresh%5C+seeds%5C+shows%5C+significant%5C+variation%5C+among%5C+populations%2C%5C+howerer%2C%5C+germination%5C+of%5C+the%5C+seeds%5C+after%5C+storage%5C+for%5C+one%5C+year%5C+in%5C+room%5C+temperature%5C+shows%5C+no%5C+significant%5C+va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