Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene

作     者：Qian Hu Yaowu Xing Jinjin Hu Yongjiang Huang Hongjie Ma Zhekun Zhou 

作者机构：Key Laboratory of Biogeography and BiodiversityKunming Institute of BotanyChinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Tropical Forest EcologyXishuangbanna Tropical Botanical GardenChinese Academy of Sciences Institute of Systematic BotanyUniversity of Zrich Faculty of Land Resource EngineeringKunming University of Science and Technology 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2014年第59卷第3期

页      面：310-319页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the National Basic Research Program of China(2012CB821901) the National Natural Science Foundation of China(41030212)to Zhekun Zhou 

主　　题：气孔密度 晚中新世 二氧化碳浓度 演变 皮毛 栎 化石种 云南昆明 

摘      要：A fossil oak species,Quercus tenuipilosa *** et ***,is reported from the upper Pliocene Ciying Formation in Kunming,Yunnan Province,southwestern *** establishment of this species is based on detailed morphologic and cuticular *** fossil leaves are elliptic,with serrate margins on the apical *** primary venation is pinnate,and the major secondary venation is *** tertiary veins are opposite or alternate-opposite percurrent with two *** stomata are anomocytic,occurring only on the abaxial *** trichome bases are unicellular or *** new fossil species shows the closest affinity with theextant *** and the late Miocene *** *** et *** from the Xiaolongtan Formation of the Yunnan *** three species share similar leaf morphology,but differ with respect to trichome base and stomatal ***,and *** can be considered to constitute the *** *** the late Miocene,a gradual reduction in trichome base density has occurred in this *** trend is the opposite of that of precipitation,indicating that increased trichome density is not an adaptation to dry *** stomatal density(SD)of the *** complex was the highest during the late Miocene,declined in the late Pliocene,and then increased during the present *** values show an inverse relationship with atmospheric CO_2 concentrations,suggesting that the SD of the *** complex may be a useful proxy for reconstruction of paleo-CO_2 concentrations.