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首页> 外文期刊>The New Phytologist >Evolutionary control of leaf element composition in plants.
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Evolutionary control of leaf element composition in plants.

机译：植物叶片元素组成的进化控制。

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摘要

Leaf nitrogen (N) and phosphorus (P) concentrations are correlated in plants. Higher-level phylogenetic effects can influence leaf N and P. By contrast, little is known about the phylogenetic variation in the leaf accumulation of most other elements in plant tissues, including elements with quantitatively lesser roles in metabolism than N, and elements that are nonessential for plant growth. Here the leaf composition of 42 elements is reported from a statistically unstructured data set comprising over 2000 leaf samples, representing 670 species and 138 families of terrestrial plants. Over 25% of the total variation in leaf element composition could be assigned to the family level and above for 21 of these elements. The remaining variation corresponded to differences between species within families, to differences between sites which were likely to be caused by soil and climatic factors, and to variation caused by sampling techniques. While the majority of variation in leaf mineral composition is undoubtedly associated with nonevolutionary factors, identifying higher-level phylogenetic variation in leaf elemental composition increases our understanding of terrestrial nutrient cycles and the transfer of toxic elements from soils to living organisms. Identifying mechanisms by which different plant families control their leaf elemental concentration remains a challenge..
机译：植物中的叶片氮（N）和磷（P）浓度相关。更高水平的系统发育效应可以影响叶片的氮和磷。相反，人们对植物组织中大多数其他元素的叶片累积的系统发生变化知之甚少，其中包括在代谢中比N数量少的元素以及非必需元素用于植物生长。在此，从统计上非结构化的数据集中报告了42种元素的叶组成，该数据集包含2000多个叶样本，代表670种植物和138陆地植物科。叶子元素组成的总变化中超过25％可以分配给这些元素中的21个或更多的家庭级别。其余的变化对应于科内物种之间的差异，可能由土壤和气候因素引起的地点之间的差异以及由采样技术引起的变化。虽然叶矿物组成的大部分变化无疑与非进化因素有关，但确定叶元素组成的更高水平的系统发育变化，可以使我们更加了解陆地养分循环以及有毒元素从土壤向生物的转移。识别不同植物家族控制其叶片元素浓度的机制仍然是一个挑战。

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