RSS1 regulates the cell cycle and maintains meristematic activity under stress conditions in rice.
RSS1 regulates the cell cycle and maintains meristematic activity under stress conditions in rice.
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DOI：
10.1038/ncomms1279
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发表时间：
2011
影响因子：
16.6
通讯作者：
Takeda, Shin
中科院分区：
文献类型：
--
作者：
Ogawa, Daisuke;Abe, Kiyomi;Miyao, Akio;Kojima, Mikiko;Sakakibara, Hitoshi;Mizutani, Megumi;Morita, Haruka;Toda, Yosuke;Hobo, Tokunori;Sato, Yutaka;Hattori, Tsukaho;Hirochika, Hirohiko;Takeda, Shin
植物的生长和发育是通过分生组织中不断的细胞分裂来维持的，这种分裂受到各种环境胁迫的干扰。为了维持分生组织的功能，细胞分裂必须与细胞分化相协调。然而，它是未知的分生组织的增殖活动和细胞分裂和分化之间的协调是如何维持在胁迫条件下。在这里，我们表明大米蛋白RSS 1的稳定性受细胞周期阶段控制，有助于分生组织细胞的活力和盐浓度条件下的生存力。RSS 1的这些作用是通过调节G1-S转换发挥的，可能是通过RSS 1与蛋白磷酸酶1的相互作用，并由植物激素细胞分裂素介导。RSS 1基因在除真双子叶植物外的植物谱系中广泛保守，表明在被子植物的辐射进化过程中，RSS 1依赖的机制可能在特定的谱系中被采用。 植物分生组织中的细胞增殖在胁迫条件下经常改变。在这项研究中，作者确定了一种植物蛋白，RSS 1，这是在细胞周期依赖的方式进行调节，并需要在非生物胁迫的存在下维持芽和根分生组织。
Plant growth and development are sustained by continuous cell division in the meristems, which is perturbed by various environmental stresses. For the maintenance of meristematic functions, it is essential that cell division be coordinated with cell differentiation. However, it is unknown how the proliferative activities of the meristems and the coordination between cell division and differentiation are maintained under stressful conditions. Here we show that a rice protein, RSS1, whose stability is controlled by cell cycle phases, contributes to the vigour of meristematic cells and viability under salinity conditions. These effects of RSS1 are exerted by regulating the G1–S transition, possibly through an interaction of RSS1 with protein phosphatase 1, and are mediated by the phytohormone, cytokinin. RSS1 is conserved widely in plant lineages, except eudicots, suggesting that RSS1-dependent mechanisms might have been adopted in specific lineages during the evolutionary radiation of angiosperms. Cell proliferation in plant meristems is often altered during conditions of stress. In this study, the authors identify a plant protein, RSS1, that is regulated in a cell-cycle dependent manner and is required to maintain shoot and root meristems in the presence of abiotic stress.
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影响因子：
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作者：
Berndt, N;Dohadwala, M;Liu, CWY
通讯作者：
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影响因子：
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通讯作者：
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