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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Salt stress induces changes in amounts and localization of the mitogen-activated protein kinase SIMK in alfalfa roots
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Salt stress induces changes in amounts and localization of the mitogen-activated protein kinase SIMK in alfalfa roots

机译：盐胁迫诱导苜蓿根部丝裂原活化蛋白激酶SIMK的数量和位置变化

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摘要

SIMK is an alfalfa mitogen-activated protein kinase (MAPK) that is activated by salt stress and shows a nuclear localization in suspension-cultured cells. Mie investigated the localization of SIMK in alfalfa (Medicago sail a) roots. Although SIMK was expressed in most tissues of the root apex, cells of the quiescent center and statocytes showed much lower SIMK protein amounts. In cells of the elongation zone, SIMK was present in much higher amounts in epidermal than in cortex cells. In dividing cells of the root tip, SIMK revealed a cell cycle phase-dependent localization, being predominantly nuclear in interphase but associating with the cell plate and the newly formed cell wall in telophase and early Gi phase. In dividing cells, salt stress resulted in an association of part of the SIMK with the preprophase band. Generally salt stress resulted in much higher amounts of SIMK in dividing cells of the root apex and epidermal cells of the elongation zone. These data demonstrate that amounts and subcellular localization of SIMK in roots is highly regulated and sensitive to environmental stress. [References: 21]
机译：SIMK是苜蓿促分裂原激活的蛋白激酶（MAPK），可通过盐胁迫激活，并在悬浮培养的细胞中显示出核定位。 Mie调查了SIMK在苜蓿（Medicago sail a）根中的定位。尽管SIMK在根尖的大多数组织中表达，但静止中心细胞和静息细胞显示出低得多的SIMK蛋白量。在伸长区的细胞中，表皮中SIMK的含量远高于皮质细胞。在分裂根尖的细胞中，SIMK显示出细胞周期的相位依赖性定位，在相间主要为核，但在末期和早期Gi阶段与细胞板和新形成的细胞壁相关。在分裂细胞中，盐胁迫导致SIMK的一部分与前期带相关联。通常，盐胁迫导致根尖的分裂细胞和伸长区的表皮细胞的SIMK含量高得多。这些数据表明，SIMK在根中的含量和亚细胞定位受到高度调节，并且对环境胁迫敏感。 [参考：21]

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