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首页> 外文期刊>PLoS Genetics >Light affects tissue patterning of the hypocotyl in the shade-avoidance response
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Light affects tissue patterning of the hypocotyl in the shade-avoidance response

机译：光影响阴影避免反应中缺杆基的组织图案化

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Plants have evolved strategies to avoid shade and optimize the capture of sunlight. While some species are tolerant to shade, plants such as Arabidopsis thaliana are shade-intolerant and induce elongation of their hypocotyl to outcompete neighboring plants. We report the identification of a developmental module acting downstream of shade perception controlling vascular patterning. We show that Arabidopsis plants react to shade by increasing the number and types of water-conducting tracheary elements in the vascular cylinder to maintain vascular density constant. Mutations in genes affecting vascular patterning impair the production of additional xylem and also show defects in the shade-induced hypocotyl elongation response. Comparative analysis of the shade-induced transcriptomes revealed differences between wild type and vascular patterning mutants and it appears that the latter mutants fail to induce sets of genes encoding biosynthetic and cell wall modifying enzymes. Our results thus set the stage for a deeper understanding of how growth and patterning are coordinated in a dynamic environment.
机译：植物已经进化了策略，以避免阴影并优化阳光捕获。虽然某些物种是宽容的阴影，但拟南芥植物如棕色鳞片状，并诱导其胚轴伸长到超越邻近的植物。我们报告了在控制血管图案的阴影感知下游作用的发育模块的识别。我们表明拟南芥植物通过增加血管圆筒中的排水气管元素的数量和类型来反应阴影，以保持血管密度恒定。影响血管图案化的基因的突变损害了额外的木耳的产生，并且还显示阴影诱导的缺血伸长率响应的缺陷。对脉冲诱导的转录瘤的比较分析显示出野生型和血管图案化突变体之间的差异，似乎后一突变体未能诱导编码生物合成和细胞壁改性酶的基因。因此，我们的结果设定了更深入地了解在动态环境中如何协调的增长和图案的理解阶段。

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