Plasticity to soil water deficit in Arabidopsis thaliana:: dissection of leaf development into underlying growth dynamic and cellular variables reveals invisible phenotypes
Plasticity to soil water deficit in Arabidopsis thaliana:: dissection of leaf development into underlying growth dynamic and cellular variables reveals invisible phenotypes
复制标题
DOI：
10.1111/j.1365-3040.2006.01595.x
复制
发表时间：
2006-12-01
影响因子：
7.3
通讯作者：
Granier, Christine
中科院分区：
文献类型：
--
作者：
Aguirrezabal, Luis;Bouchier-Combaud, Sandrine;Granier, Christine
在拟南芥中已经报道了响应于水分亏缺的叶面积扩展的可塑性的遗传变异。在这里，目的是确定潜在的动态和细胞过程中涉及这种变异性。25加入进行相同的土壤水分亏缺处理。在所有材料中，与单个叶片扩展相比，叶片生产的可塑性较低。一个子集的加入被选择为进一步解剖的个人叶片扩展到其潜在的变量：叶片扩展和表皮细胞的数量和面积的速度和持续时间。在所有的加入，水分亏缺的速度和叶片扩展的持续时间有相反的影响。这些影响的积累反映在最终叶面积的变化。在细胞水平上，适度的水分亏缺对细胞数量和细胞大小有相反的影响，但更严重的水分亏缺会降低这两个变量。这些相反的效果的重要性是突出的加入An-1的行为，其中叶扩展速率的降低和扩展的持续时间的增加之间的补偿是总的。当仅进行最终测量时，这种响应于水分不足的动态塑性是不可检测的。
Genetic variability in the plasticity of leaf area expansion in response to water deficit has been reported in Arabidopsis thaliana. Here, the objective was to identify the underlying dynamic and cellular processes involved in this variability. Twenty-five accessions were subjected to identical soil water deficit treatments. In all accessions, the plasticity of leaf production was low compared with that of individual leaf expansion. A subset of accessions was selected for further dissection of individual leaf expansion into its underlying variables: the rate and duration of leaf expansion and epidermal cell number and area. In all accessions, water deficit had opposite effects on the rate and duration of leaf expansion. The accumulation of these effects was reflected in changes in final leaf area. At the cellular level, moderate water deficits had opposite effects on cell number and cell size, but more severe ones reduced both variables. The importance of these opposing effects is highlighted by the behaviour of the accession An-1, for which the compensation between the decrease in leaf expansion rate and the increase in the duration of expansion is total. This dynamic plasticity in response to water deficit is not detectable when only final measurements are done.