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题名: Variation in Ginkgo biloba L. leaf characters across a climatic gradient in China
作者: Sun, BN(孙柏年); Dilcher, DL; Beerling, DJ; Zhang, CJ(张成君); Yan, DF(闫德飞); Kowalski, E
收录类别: SCIE
出版日期: 2003-06-10
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷号: 100, 期号:12, 页码:7141-7146
英文摘要: Fossil leaves assigned to the genus Ginkgo are increasingly being used to reconstruct Mesozoic and Tertiary environments based on their stomatal and carbon isotopic characteristics. We sought to provide a more secure basis for understanding variations seen in the plant fossil record by determining the natural variability of these properties of sun and shade leaf morphotypes of Ginkgo biloba trees under the present atmospheric CO2 concentration and a range of contemporary climates in three Chinese locations (Lanzhou, Beijing, and Nanjing). Climate had no major effects on leaf stomatal index (proportion of leaf surface cells that are stomata) but did result in more variable stomatal densities. The effects of climate and leaf morphotype on stomatal index were rather conserved (< 1 %) and much less than the response of trees to recent CO2 increases. Leaf carbon isotope discrimination (Delta) was highest for trees in Nanjing, which experience a warm, moist climate, whereas trees in the most and site (Lanzhou) had the lowest Delta values. Interestingly, the variation in Delta shown by leaf populations of trees from China and the United Kingdom was very similar to that of fossil Ginkgo cuticles dating to the Mesozoic and Tertiary, which suggests to us that the physiology of leaf carbon uptake and regulation of water loss in Ginkgo has remained highly conserved despite the potential for evolutionary change over millions of years.
作者部门: Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA ; Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England ; Lanzhou Univ, Sch Resources & Environm, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Dilcher, DL (reprint author), Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA.
学科分类: Science & Technology - Other Topics
文章类型: Article
语种: 英语
DOI: 10.1073/pnas.1232419100
ISSN号: 0027-8424
WOS记录号: WOS:000183493500046
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119572
Appears in Collections:资源环境学院_期刊论文

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