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首页> 外文期刊>Microgravity science and technology >Distribution Of Calcium Ions In Cells Of The Root Distal Elongation Zone Under Clinorotation
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Distribution Of Calcium Ions In Cells Of The Root Distal Elongation Zone Under Clinorotation

机译：旋转条件下根远端延伸区细胞内钙离子的分布

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摘要

Currently, calcium ions are known to play a crucial role in the vital activity of plant cells and in stimulus-response coupling for many environmental signals, altered gravity included. The available data on changes in Ca~(2+) distribution and concentration in the cells of different organisms influenced by altered gravity allow to suggest that microgravity affects the calcium messenger system, and provide new insight for the understanding of calcium-and gravity-dependent cellular processes. We have studied with confocal microscopy the distribution and relative content of calcium ions in the Beta vulgaris root distal elongation zone cells grown under slow horizontal clinorotation, reproducing one of the microgravity particularities, namely the absence of an orienting action of the gravity vector, compared to control conditions. We demonstrate that Ca~(2+) relative content is 1.3 times higher in the roots of seedlings grown upwards and 1.2 times higher in the seedlings grown downwards compared to the control. Based on obtained data, taking into account the specific physiological properties of cells in the distal elongation zone, it is supposed that, under clinorotation, enhanced Ca~(2+) relative content affects Ca~(2+)-dependent cytoskeleton reorganization involved in cell gravisensing in altered gravity.
机译：目前，已知钙离子在植物细胞的生命活动中以及在许多环境信号（包括改变的重力）的刺激-反应耦合中起着至关重要的作用。有关重力变化影响的不同生物细胞中Ca〜（2+）分布和浓度变化的可用数据表明，微重力影响钙信使系统，并为了解钙依赖性和重力依赖性提供了新的见解。细胞过程。我们用共聚焦显微镜研究了在缓慢水平水平旋转下生长的β寻常根远侧延伸区细胞中钙离子的分布和相对含量，再现了微重力的特质之一，即与重力载体相比没有重力作用控制条件。我们证明，与对照相比，Ca〜（2+）相对含量在向上生长的幼苗的根中高1.3倍，在向下生长的幼苗中高1.2倍。根据获得的数据，考虑到远端延伸区中细胞的特定生理特性，可以认为在旋转条件下，增加的Ca〜（2+）相对含量会影响与Ca〜（2+）有关的依赖于细胞骨架的重组重力改变后细胞趋于平滑。

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