Anatomical variations of living and fossil Liquidambar leaves: A proxy for paleoenvironmental reconstruction
Anatomical variations of living and fossil Liquidambar leaves: A proxy for paleoenvironmental reconstruction
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活体和化石枫香叶的解剖变化：古环境重建的代表
DOI：
10.1007/s11430-010-4135-4
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发表时间：
2011-04
影响因子：
5.7
通讯作者：
Xiao Liang
中科院分区：
文献类型：
--
作者：
Sun Bainian;Ren Wenxiu;Li Xiangchuan;Jia Hui;Xiao Liang
我们以活体台湾凤梨为基础，建立了表皮细胞周长（Circum.）、波动指数（UI）、上、下表皮的表皮细胞面积（EA）以及相应的表皮细胞密度（ED）等表皮细胞特性，适合区分阳叶和阴叶。此外，下表皮的气孔特性，包括气孔长度（SL）、气孔孔长度（PL）和相应的气孔密度（SD），是识别阳/阴形态类型的可靠参数。然后将该解剖方法应用于浙江省中新世仙南山组的 18 块 L. miosinica 叶子遗骸，并将化石叶子分为两类，即阳形和阴形形态类型。这表明在现存物种中发现的阳光叶和遮荫叶之间的解剖学差异可以用于化石叶子。值得注意的是，与下表皮相比，上表皮的UI在阳光和阴影形态类型之间的变化更大，表明上表皮的UI对环境变化更敏感。此外，对于现代枫香和化石枫香来说，阳叶的解剖特征比阴叶的变化更大，这表明阳叶可能对环境变化更敏感。太阳叶可以成为古环境变化的更好指标。因此，利用枫香叶遗骸重建古环境应采用太阳形态型的气孔参数。另一方面，下南山组的三叶 L. miosinica 叶组合化石具有几乎相似的阳光和阴影形态类型百分比（分别为 56% 和 44%），这归因于沉积前的短暂传输。因此，识别阳光/阴影形态类型对于基于枫香叶化石重建古环境非常有用。
Based on living L. formosana, we have established that such epidermal cell properties as epidermal cell circumference (Circum.), undulation index (UI), epidermal cell area (EA) on both upper and lower epidermis and the corresponding epidermal cell density (ED), are suitable to differentiate between sun and shade leaves. Also, stomatal properties on the lower epidermis, including stomatal length (SL), stomatal pore length (PL) and the corresponding stomatal density (SD), are reliable parameters to identify sun/shade morphotypes. Then this anatomical approach was applied to 18 leaf remains of L. miosinica from the Miocene Xiannanshan Formation, Zhejiang Province (eastern China), and the fossil leaves were sorted into two groups, namely, sun and shade morphotypes. It indicates that anatomical differences between sun and shade leaves found in living species could be used for fossil leaves. Notably, the variation of UI between sun and shade morphotypes is larger on the upper epidermis as compared with the lower epidermis, showing that the UI on the upper epidermis is more sensitive to environmental changes. In addition, anatomical features are more variable in sun leaves than in shade leaves for both modern and fossil Liquidambar, suggesting sun leaves may be more sensitive to environmental changes. Sun leaves can then be a better indicator of paleoenvironmental change. Thus, stomatal parameters of sun morphotype should be adopted on reconstructing paleoenvironments using Liquidambar leaf remains. On the other hand, the three-lobed fossil L. miosinica leaf assemblage in the Xiananshan Formation is represented by an almost similar percentage of sun and shade morphotypes (56% and 44%, respectively), which is attributed to the short transport before deposition. As a result, identifying sun/shade morphotypes are very useful in reconstructing paleoenvironments based on fossil leaves of Liquidambar.
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DOI：
--
发表时间：
2008
期刊：
Advances in Earth Science
影响因子：
--
作者：
Dai Jing
通讯作者：
Dai Jing
DOI：
--
发表时间：
1976-09
期刊：
--
影响因子：
--
作者：
T. Tanai
通讯作者：
T. Tanai
DOI：
10.1046/j.1469-8137.2003.00702.x
发表时间：
2003-03
期刊：
The New phytologist
影响因子：
--
作者：
J. Wynn
通讯作者：
J. Wynn
影响因子：
5.8
作者：
J. McElwain
通讯作者：
J. McElwain
影响因子：
3
作者：
Lockheart, MJ;VanBergen, PF;Evershed, RP
通讯作者：
Evershed, RP