Correlation between leaf growth variables suggest intrinsic and early controls of leaf size in Arabidopsis thaliana
Correlation between leaf growth variables suggest intrinsic and early controls of leaf size in Arabidopsis thaliana
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DOI：
10.1111/j.1365-3040.2005.01368.x
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发表时间：
2005-11-01
影响因子：
7.3
通讯作者：
Granier, C
中科院分区：
文献类型：
--
作者：
Cookson, SJ;Van Lijsebettens, M;Granier, C
叶片发育受内部（遗传）和外部（环境）调节因素的影响。这项工作的目的是调查叶片生长变量是如何在一系列环境中相互关联的。以野生型拟南芥（Arabidopsis thaliana）和叶片发育突变体（ang 4、ron 2 -1、elo 1、elo 2和elo 4）为材料，研究了不同光照条件下叶片生长的变化。研究的叶片被改变在各种叶发育变量，如扩张的持续时间，相对和绝对扩张率，表皮细胞大小，表皮细胞数量和起始速率。最终叶面积相关的最大绝对叶片扩展速率和细胞数量，但不叶片扩展或细胞大小的持续时间。这些关系是共同的所有研究的基因型和光照条件下，表明叶片大小是在发展的早期。此外，参与叶片发育的早期变量彼此相关，初始相对扩展速率与扩展持续时间呈负相关。这些关系的叶片发育变量被用来构建一个概念模型的叶片大小控制。
Leaf development is affected by both internal (genetic) and external (environmental) regulatory factors. The aim of this work was to investigate how leaf growth variables are related to one another in a range of environments. The leaf growth variables of wild-type Arabidopsis thaliana and leaf development mutants (ang4, ron2-1, elo1, elo2 and elo4) were studied under different incident light treatments (light and shade). The leaves studied were altered in various leaf development variables, such as the duration of expansion, relative and absolute expansion rates, epidermal cell size, epidermal cell number and initiation rate. Final leaf area was correlated to maximal absolute leaf expansion rate and cell number, but not to duration of leaf expansion or cell size. These relationships were common to all studied genotypes and light conditions, suggesting that leaf size is determined early in development. In addition, the early variables involved in leaf development were correlated to one another, and initial relative expansion rate was negatively correlated to the duration of expansion. These relationships between the leaf development variables were used to construct a conceptual model of leaf size control.