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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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GST,p < 0.001) and low levels of seed-based gene flow. C. debaoensis (Cycadaceae) is an endangered species restricted to the border of Guangxi and Yunnan province in southwest China. This species has been classified into two types: sand and karst, according to the soil matrix they grow on. We examined chloroplast sequence variation of the cpDNA sequences from 11 populations of this species. Significant population genetic differentiation was detected (GST= 0.684 and FST = 0.74160). There was marked genetic differentiation between populations in the sand and karst regions and no expansion was detected. Climate changes during glacial periods have had significant effects on the current distribution of cycads. The molecular phylogenetic data, together with the geographic distribution of the haplotypes, suggest that C. debaoensis experienced range contraction during glacial periods, and that the current populations are still confined to the original refugia in southwest China which have favorable habitats in glacial period. These results imply that small refugia were maintained in both sand and karst regions during the LGM (last glacial maximum). This species had no postglacial recolonization and only stayed in these refugia up to now. The low within-population diversity of C. debaoensis suggests that there were strong bottleneck events or founder effects within each separate region during the Quaternary climatic oscillations. Relatively high genetic and haplotype diversities were detected in the newly discovered populations, which located at intermediate locality of sand regions and had morphological variation; this is probably the consequence of the admixture of different haplotypes colonizing the area from separate sources. C. micholitzii occurs in the Annan Highlands in central Vietnam near the Laos border. C. bifida occurs in North Vietnam; its distribution extends across the border into adjacent localities in Guangxi and Yunnan in China. For the comparability between them,theywere considered as the same species C. micholitzii by many academicians. The cpDNA sequences from 11 populations showed that these very controversial species, C. micholitzii and C. bifida, is paraphyletic and should belong to the same species C. micholitzii. AMOVA analysis showed that the component of among-population within region/species (76.46%) was unexpectedly larger than the among-species/region component (14.97%), which also indicates that there is no justification for recognizing two species as C. micholitzii and C. bifida. This hypothesis was also supported by the geological data, especially the neotectonic history of the indo-china block, which started to move south since Oligocene and cause the geographic isolation of these two groups. Therefore, the most likely explanation to the phenotypic similarities between these two groups may be the retention of ancestral polymorphisms in the paraphyletic group due to incomplete lineage sorting. Furthermore, the similarities may also be ascribed to pollen-mediated gene flow among geographically proximate populations and/or phenotypic convergence under similar selection schemes in the same region. C.micholitzi had the higest genetic diversity (HT = 0.980,) and genetic differentiation (GST = 0.830, NST = 0.915) among the C. micholitzii complex. The high genetic diversity might be attributed to its long evolutionary history, highly diverse habitats. The ineffective mode of seed dispersal and dramatic neotectonic movement in the distribution range of this species could result in the high genetic differentiation. 2. Phylogeographic analysis based on nuclear ribosomal sequences, We sequenced the nrDNA ITS in all 27 populations sampled, 7 haplotypes were identified, among which C. micholitzii had 6, while C. multipinnata, C. longipetiolula and C. debaoensis shared the remaining one. Compared to chloroplast genes, nuclear genes had higher correlation between genetic and geographical distance, but lower interspecies differentiation (54.42% vs 25.24%). Phylogeographical structure of C. micholitzii and C.bifida based on ITS Variation was consistent with the morphology differentiation. This similar in nuclear gene should be ascribed to pollen-mediated gene flow among geographically proximate populations.Long-distance gene flow over the two groups was clearly interrupted, which brought on the nrDNA genetic differenciation between the geographically isolated groups, to a certain extent affected the morphological variation. 3. Interspecies relationships among Cycas micholitzii complex, We analysed chloroplast sequence variation of the atpB-rbcL and psbA-trnH intergenic spacers in 27 populations sampled of C. micholitzii complex, AMOVA analysis showed that the component of among-species/region component (59.21%). However, phylogenic analysis showed that the haplotypes of C. micholitzii complex couldn`t grouped into four clusters closely corresponding to the narrowly defined C. micholitzi, C. multipinnata, C. debaoensis and C. longipetiolula. We concluded that the conflict may result from several factors: firstly incomplete lineage sorting of C. micholitzii; secondly hybridization/introgression of sympatrically cycads, which would be supported by evidence base on nrDNA ITS sequences; thirdly intramolecular recombination in cpDNA of cycads; eventually the neotectonic movement in the distribution range of this 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Plant RD Center[Y65J8322C1]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ADr.%5C+Plant%5C+RD%5C+Center%5C%5BY65J8322C1%5C%5D"},{"jsname":"ECOLPIN[AGL2011-24296]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AECOLPIN%5C%5BAGL2011%5C-24296%5C%5D"},{"jsname":"EU MSCA individual fellowship[705432]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AEU%5C+MSCA%5C+individual%5C+fellowship%5C%5B705432%5C%5D"},{"jsname":"EU MSCA individual fellowship[750252]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AEU%5C+MSCA%5C+individual%5C+fellowship%5C%5B750252%5C%5D"},{"jsname":"European Research Council through the Advanced Grant Project TREEPEACE[FP7-339728]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AEuropean%5C+Research%5C+Council%5C+through%5C+the%5C+Advanced%5C+Grant%5C+Project%5C+TREEPEACE%5C%5BFP7%5C-339728%5C%5D"},{"jsname":"Medicinal plant resource is one of the most important natural resources. China is well-known in the world for its richness in medicinal plant diversity and use knowledge. Some of the plant resources are developed industrially, while the others maintain the traditional use still. However, the extended resources utilization has caused the dramatic increase in demand and the exhaustion of resources. Thus, it is become one of the most important research topics that how to use medicinal resources rationally without resource depletion and those studies need to be supported by knowledge, information and data of related disciplines. On the bassis of authoritative books, literature searches and field survey, we constructed an herbal information database as an approach for data managing. Along the theme that how medicinal resources (plant species) used in various medicinal systems (traditional Chinese medicine, folk medicine), we developed a database integrating species information, herbal knowledge and usage information of about 10,000 medicinal plants, which have satisfied the data requirement of our study and analysis. In addition, we will shear data for research and decision-making by online database service. Finally, to verify the supporting function of this database in study and decision-making, and to explore new research methods of plant resources sustainable use, we applied research methods used in social statistics, such as logistic regression analysis, discriminant analysis and correspondence analysis. In addition, statistics and the analysis of typical medical systems were developed for studies on the resource usage and its sustainability factors. The data analysis showed as following: (1) Studies about plant resources sustainable utilization needs to be supported by integrated data of related subjects.(2) Applications of traditional medicines increased steadily. There was a substantial increase of Chinese patent medicines documented in each editions of pharmacopoeia, involving about 600-800 species of medicinal plant resources. But the modernization and development of medicinal plant resources have caused the resources depletion and cultivation. And there is a trend that the caltivation supplies the rescources demand (3) Whether plant resource will be depleted or not, is affected by the distribution of plant population, the rehabilitation ability of plants, the damage of human harvesting, and the advance in herb cultivation.(4) There is a considerable proportion of an unreasonable development pattern that cultivation is promoted by resource depletion. Two main reasons caused the exhaustion: lacking investigation in the supply abilities of wild plants and legging of wild species domestication. It is unwise to follow the existing developmental pattern, which will cause more resource depletion and biodiversity damage. Finally, on the basis of our study, we have proposed some reasonable strategies to avoid irrational factors in the herbal resources exploitation: Ø Develop traditional medicines furtherly for new medicinal resources. Ø Protect the plant wild resources and develop cultivation in herbal drug explotation. Ø Establish regulatory agencies and formulate policies of herbal resources development. Ø Continue to improve the database of medicinal plants with integrated data.","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AMedicinal%5C+plant%5C+resource%5C+is%5C+one%5C+of%5C+the%5C+most%5C+important%5C+natural%5C+resources.%5C+China%5C+is%5C+well%5C-known%5C+in%5C+the%5C+world%5C+for%5C+its%5C+richness%5C+in%5C+medicinal%5C+plant%5C+diversity%5C+and%5C+use%5C+knowledge.%5C+Some%5C+of%5C+the%5C+plant%5C+resources%5C+are%5C+developed%5C+industrially%2C%5C+while%5C+the%5C+others%5C+maintain%5C+the%5C+traditional%5C+use%5C+still.%5C+However%2C%5C+the%5C+extended%5C+resources%5C+utilization%5C+has%5C+caused%5C+the%5C+dramatic%5C+increase%5C+in%5C+demand%5C+and%5C+the%5C+exhaustion%5C+of%5C+resources.%5C+Thus%2C%5C+it%5C+is%5C+become%5C+one%5C+of%5C+the%5C+most%5C+important%5C+research%5C+topics%5C+that%5C+how%5C+to%5C+use%5C+medicinal%5C+resources%5C+rationally%5C+without%5C+resource%5C+depletion%5C+and%5C+those%5C+studies%5C+need%5C+to%5C+be%5C+supported%5C+by%5C+knowledge%2C%5C+information%5C+and%5C+data%5C+of%5C+related%5C+disciplines.%5C+On%5C+the%5C+bassis%5C+of%5C+authoritative%5C+books%2C%5C+literature%5C+searches%5C+and%5C+field%5C+survey%2C%5C+we%5C+constructed%5C+an%5C+herbal%5C+information%5C+database%5C+as%5C+an%5C+approach%5C+for%5C+data%5C+managing.%5C+Along%5C+the%5C+theme%5C+that%5C+how%5C+medicinal%5C+resources%5C+%5C%28plant%5C+species%5C%29%5C+used%5C+in%5C+various%5C+medicinal%5C+systems%5C+%5C%28traditional%5C+Chinese%5C+medicine%2C%5C+folk%5C+medicine%5C%29%2C%5C+we%5C+developed%5C+a%5C+database%5C+integrating%5C+species%5C+information%2C%5C+herbal%5C+knowledge%5C+and%5C+usage%5C+information%5C+of%5C+about%5C+10%2C000%5C+medicinal%5C+plants%2C%5C+which%5C+have%5C+satisfied%5C+the%5C+data%5C+requirement%5C+of%5C+our%5C+study%5C+and%5C+analysis.%5C+In%5C+addition%2C%5C+we%5C+will%5C+shear%5C+data%5C+for%5C+research%5C+and%5C+decision%5C-making%5C+by%5C+online%5C+database%5C+service.%5C+Finally%2C%5C+to%5C+verify%5C+the%5C+supporting%5C+function%5C+of%5C+this%5C+database%5C+in%5C+study%5C+and%5C+decision%5C-making%2C%5C+and%5C+to%5C+explore%5C+new%5C+research%5C+methods%5C+of%5C+plant%5C+resources%5C+sustainable%5C+use%2C%5C+we%5C+applied%5C+research%5C+methods%5C+used%5C+in%5C+social%5C+statistics%2C%5C+such%5C+as%5C+logistic%5C+regression%5C+analysis%2C%5C+discriminant%5C+analysis%5C+and%5C+correspondence%5C+analysis.%5C+In%5C+addition%2C%5C+statistics%5C+and%5C+the%5C+analysis%5C+of%5C+typical%5C+medical%5C+systems%5C+were%5C+developed%5C+for%5C+studies%5C+on%5C+the%5C+resource%5C+usage%5C+and%5C+its%5C+sustainability%5C+factors.%5C+The%5C+data%5C+analysis%5C+showed%5C+as%5C+following%5C%3A%5C+%5C%281%5C%29%5C+Studies%5C+about%5C+plant%5C+resources%5C+sustainable%5C+utilization%5C+needs%5C+to%5C+be%5C+supported%5C+by%5C+integrated%5C+data%5C+of%5C+related%5C+subjects.%5C%282%5C%29%5C+Applications%5C+of%5C+traditional%5C+medicines%5C+increased%5C+steadily.%5C+There%5C+was%5C+a%5C+substantial%5C+increase%5C+of%5C+Chinese%5C+patent%5C+medicines%5C+documented%5C+in%5C+each%5C+editions%5C+of%5C+pharmacopoeia%2C%5C+involving%5C+about%5C+600%5C-800%5C+species%5C+of%5C+medicinal%5C+plant%5C+resources.%5C+But%5C+the%5C+modernization%5C+and%5C+development%5C+of%5C+medicinal%5C+plant%5C+resources%5C+have%5C+caused%5C+the%5C+resources%5C+depletion%5C+and%5C+cultivation.%5C+And%5C+there%5C+is%5C+a%5C+trend%5C+that%5C+the%5C+caltivation%5C+supplies%5C+the%5C+rescources%5C+demand%5C+%5C%283%5C%29%5C+Whether%5C+plant%5C+resource%5C+will%5C+be%5C+depleted%5C+or%5C+not%2C%5C+is%5C+affected%5C+by%5C+the%5C+distribution%5C+of%5C+plant%5C+population%2C%5C+the%5C+rehabilitation%5C+ability%5C+of%5C+plants%2C%5C+the%5C+damage%5C+of%5C+human%5C+harvesting%2C%5C+and%5C+the%5C+advance%5C+in%5C+herb%5C+cultivation.%5C%284%5C%29%5C+There%5C+is%5C+a%5C+considerable%5C+proportion%5C+of%5C+an%5C+unreasonable%5C+development%5C+pattern%5C+that%5C+cultivation%5C+is%5C+promoted%5C+by%5C+resource%5C+depletion.%5C+Two%5C+main%5C+reasons%5C+caused%5C+the%5C+exhaustion%5C%3A%5C+lacking%5C+investigation%5C+in%5C+the%5C+supply%5C+abilities%5C+of%5C+wild%5C+plants%5C+and%5C+legging%5C+of%5C+wild%5C+species%5C+domestication.%5C+It%5C+is%5C+unwise%5C+to%5C+follow%5C+the%5C+existing%5C+developmental%5C+pattern%2C%5C+which%5C+will%5C+cause%5C+more%5C+resource%5C+depletion%5C+and%5C+biodiversity%5C+damage.%5C+Finally%2C%5C+on%5C+the%5C+basis%5C+of%5C+our%5C+study%2C%5C+we%5C+have%5C+proposed%5C+some%5C+reasonable%5C+strategies%5C+to%5C+avoid%5C+irrational%5C+factors%5C+in%5C+the%5C+herbal%5C+resources%5C+exploitation%5C%3A%5C+%C3%98%5C+Develop%5C+traditional%5C+medicines%5C+furtherly%5C+for%5C+new%5C+medicinal%5C+resources.%5C+%C3%98%5C+Protect%5C+the%5C+plant%5C+wild%5C+resources%5C+and%5C+develop%5C+cultivation%5C+in%5C+herbal%5C+drug%5C+explotation.%5C+%C3%98%5C+Establish%5C+regulatory%5C+agencies%5C+and%5C+formulate%5C+policies%5C+of%5C+herbal%5C+resources%5C+development.%5C+%C3%98%5C+Co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of environmental protection of China[Y61D031271]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AMinistry%5C+of%5C+environmental%5C+protection%5C+of%5C+China%5C%5BY61D031271%5C%5D"},{"jsname":"NASA[NNX12AK56G]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ANASA%5C%5BNNX12AK56G%5C%5D"},{"jsname":"NSFC[U1602264]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ANSFC%5C%5BU1602264%5C%5D"},{"jsname":"National Natural Science Foundation of China[31472052]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ANational%5C+Natural%5C+Science%5C+Foundation%5C+of%5C+China%5C%5B31472052%5C%5D"},{"jsname":"National Natural Science Foundation of China[31670322]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ANational%5C+Natural%5C+Science%5C+Foundation%5C+of%5C+China%5C%5B31670322%5C%5D"},{"jsname":"National Nature Science Foundation of China[31670340]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ANational%5C+Nature%5C+Science%5C+Foundation%5C+of%5C+China%5C%5B31670340%5C%5D"},{"jsname":"Russian Science Foundation[16-14-10208]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3ARussian%5C+Science%5C+Foundation%5C%5B16%5C-14%5C-10208%5C%5D"},{"jsname":"Young Academic and Technical Leader Raising Foundation of Yunnan Province[2015HB091]","jscount":"1","jsurl":"/simple-search?field1=all&field=dc.citation.source_filter&advanced=false&query1=Social-ecological%2BSystems&&fq=dc.project.title_filter%3AYoung%5C+Academic%5C+and%5C+Technical%5C+Leader%5C+Raising%5C+Foundation%5C+of%5C+Yunnan%5C+Province%5C%5B2015HB091%5C%5D"},{"jsname":"lastIndexed","jscount":"2024-09-19"}],"资助项目","dc.project.title_filter")'>
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