Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene
Hu, Qian1,2; Xing, Yaowu3,4; Hu, Jinjin1,2; Huang, Yongjiang1; Ma, Hongjie5; Zhou, Zhekun1,3
2014
发表期刊CHINESE SCIENCE BULLETIN
ISSN1001-6538
卷号59期号:3页码:310-319
摘要A fossil oak species, Quercus tenuipilosa Q. Hu et Z.K. Zhou, is reported from the upper Pliocene Ciying Formation in Kunming, Yunnan Province, southwestern China. The establishment of this species is based on detailed morphologic and cuticular investigations. The fossil leaves are elliptic, with serrate margins on the apical half. The primary venation is pinnate, and the major secondary venation is craspedodromous. The tertiary veins are opposite or alternate-opposite percurrent with two branches. The stomata are anomocytic, occurring only on the abaxial epidermis. The trichome bases are unicellular or multicellular. The new fossil species shows the closest affinity with the extant Q. delavayi and the late Miocene Q. praedelavayi Y.W. Xing et Z.K. Zhou from the Xiaolongtan Formation of the Yunnan Province. All three species share similar leaf morphology, but differ with respect to trichome base and stomatal densities. Q. tenuipilosa, Q. praedelavayi, and Q. delavayi can be considered to constitute the Q. delavayi complex. Since the late Miocene, a gradual reduction in trichome base density has occurred in this complex. This trend is the opposite of that of precipitation, indicating that increased trichome density is not an adaptation to dry environments. The stomatal density (SD) of the Q. delavayi complex was the highest during the late Miocene, declined in the late Pliocene, and then increased during the present epoch. These values show an inverse relationship with atmospheric CO2 concentrations, suggesting that the SD of the Q. delavayi complex may be a useful proxy for reconstruction of paleo-CO2 concentrations.
关键词Quercus Delavayi Complex Quercus Tenuipilosa Morphology Evolution Neogene Co2 Concentration
资助信息National Basic Research Program of China [2012CB821901]; National Natural Science Foundation of China [41030212]
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/17954
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biogeog & Biodivers, Kunming 650201, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Peoples R China
4.Univ Zurich, Inst Systemat Bot, CH-8008 Zurich, Switzerland
5.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Peoples R China
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Hu, Qian,Xing, Yaowu,Hu, Jinjin,et al. Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene[J]. CHINESE SCIENCE BULLETIN,2014,59(3):310-319.
APA Hu, Qian,Xing, Yaowu,Hu, Jinjin,Huang, Yongjiang,Ma, Hongjie,&Zhou, Zhekun.(2014).Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene.CHINESE SCIENCE BULLETIN,59(3),310-319.
MLA Hu, Qian,et al."Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene".CHINESE SCIENCE BULLETIN 59.3(2014):310-319.
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