Leaf morphology correlates with water and light availability:What consequences for simple and compound leaves?  

作　　者：Fei Xu Weihua Guo Weihong Xu Yinghua Wei Renqing Wang 

机构地区：[1]Institute of Ecology and Biodiversity, College of Life Sciences, Shandong University Jinan 250100, China

出　　处：《Progress in Natural Science:Materials International》2009年第12期1789-1798,共10页自然科学进展·国际材料（英文版）

基　　金：supported by the Key Project of the Natural Science Foundation of Shandong Province(Grant Nos.Z2006D04 and Z2007D02);the Program for New Century Excellent Talents in the University of China (Grant No.NCET-07-0511).

摘　　要：Leaves are organs sensitive to environmental changes in the process of evolution and may exhibit phenotypic plasticity as a response to abiotic stress. However, affirmation of leaf morphological plasticity and its regulations in different environments are still unclear. We performed a simulated experiment to study the variations of leaf morphology in different gradients of water and light availability. Considering different types of leaves and venation, we chose pinnate-veined simple leaves of Quercus acutissima and compound leaves of Robinia pseudoacacia as the study objects. The morphological parameters we investigated include leaf size, shape and venation pattern which can be easily measured in the field. Significant variations occurred in many parameters due to the effects of the environment and/or allometry. There were broadly consistent trends for leaf morphological variations along the gradients. The leaf size became smaller with a short supply of resources. Leaf elongation and fractions of the lamina area altered to enhance resources acquisition and conservation. Trade-offs between investments in support and functional structures optimized the venation pattern of major and minor veins. Leaflets partially played a role such as leaf teeth, for they are not only individual units, but also a part of the compound leaf. We suggest that more or less the same trends in morphological variations may be an important explanation for coexisting species to adapt to similar habitats and form the niche differentiation.叶子是对在进化的过程的环境变化敏感的机关并且可以作为对不能生活的应力的回答展出 phenotypic 粘性。然而，叶的肯定在不同环境的词法粘性和它的规定仍然是不清楚的。我们执行了一个模仿的实验在水和轻可获得性的不同坡度学习叶形态学的变化。就叶子和脉络的不同类型而言，当学习反对，我们选择了 Quercus acutissima 的羽状静脉的简单叶子和 Robinia 假相思树的复合叶子。我们调查了的词法参数包括能容易在这个领域里被测量的叶尺寸，形状和脉络模式。重要变化由于环境或异速生长的效果发生在许多参数。为叶有广泛地一致的趋势沿着坡度的词法变化。叶尺寸与资源的短供应变得更小。薄板区域的叶延伸和部分改变了提高资源获得和保存。在在支持和功能的结构的投资之间的交易优化了主要、次要的静脉的脉络模式。传单部分起了象叶牙齿那样的一个作用因为他们是复合的叶的不仅单个单位，而且部分。我们差不多建议那在词法变化的一样的趋势可以是重要解释让共存的种类适应类似的产地并且形成壁龛区别。

关 键 词：Environmental correlation Leaf morphological trait Leaf type Venation pattern Quercus acutissima Robinia pseudoacacia 

分 类 号：S792.120.2[农业科学—林木遗传育种] TS272.55[农业科学—林学]