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首页> 外文期刊>Cytology and genetics >The Effect Of Okadaic Acid On Arabidopsis Thaliana Root Morphology And Microtubule Organization In Its Cells
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The Effect Of Okadaic Acid On Arabidopsis Thaliana Root Morphology And Microtubule Organization In Its Cells

机译：冈田酸对其拟南芥根细胞形态和微管组织的影响

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摘要

To investigate the role of protein hyperphosphorylation in plant cells, the effect of okadaic acid, a specific inhibitor of protein phosphatases PPI and PP2A, on the general morphology of Arabidopsis thaliana primary roots and the structural-functional characteristics of cortical microtubules in different cell types in all primary root growth zones was studied. It was found that okadaic acid affects microtubule organization in a different manner depending on the type of cells and functional zones of the primary root. Cortical microtubules in the epidermis and cortex cells of the elongation zone proved to be most sensitive to 0.1, 1, and 10 nM okadaic acid which completely depolymerized after inhibitor treatment. In trichoblasts, atrichoblasts of differentiation zone treatment with okadaic acid caused the microtubules stabilization. The treatment with okadaic acid significantly affected the morphology of root hairs, causing their swelling and branching as a result of abnormal microtubule orientation. The results of this study suggest that induction of protein hyperphosphorylation as a result of protein phosphatase inhibition plays a crucial key in microtubule organization in plant cells.
机译：为了研究蛋白质过度磷酸化在植物细胞中的作用，冈田酸（蛋白质磷酸酶PPI和PP2A的特异性抑制剂）对拟南芥初级根的一般形态以及不同细胞类型中皮层微管的结构功能特性的影响研究了所有初级根生长区。已经发现，冈田酸取决于细胞的类型和初生根的功能区，以不同的方式影响微管的组织。伸长区的表皮和皮层细胞中的皮质微管被证明对0.1nM，10nM和10nM的冈田酸最为敏感，后者在抑制剂处理后会完全解聚。在成毛细胞中，用冈田酸处理分化区的成纤维细胞引起微管的稳定。冈田酸处理显着影响根毛的形态，由于微管取向异常而导致其膨胀和分支。这项研究的结果表明，由于抑制蛋白质磷酸酶引起的蛋白质过度磷酸化的诱导在植物细胞中微管组织中起着关键性的作用。

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