Amyloplast Size and Number in Gravity-compensated Oat Seedlings.
Amyloplast Size and Number in Gravity-compensated Oat Seedlings.
复制标题
重力补偿燕麦幼苗中淀粉体的大小和数量。
DOI：
10.1104/pp.53.3.398
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发表时间：
1974
期刊：
影响因子：
7.4
通讯作者：
S. A. Gordon
中科院分区：
文献类型：
--
作者：
R. Hinchman;S. A. Gordon
水平回转器的重力补偿增加了燕麦（Avena sativa cv.胜利）胚芽鞘薄壁组织细胞，与垂直旋转和静止的对照相比。在黑暗中生长的胚芽鞘尖薄壁细胞，测得的淀粉颗粒大小表现出广泛的直径分布，从约1.5到约8.0 μ m，但分为三个突出的直径类。与对照组相比，来自尖端和根尖下区域的补偿组织在较大的尺寸类别中具有更多的淀粉粒，而在较小的尺寸类别中具有更少的淀粉粒。每个细胞的淀粉粒总数、每个细胞的质体总数和细胞体积不受重力补偿的影响。具有大淀粉粒的淀粉体比具有小淀粉粒的淀粉体更致密，并且直径更大。淀粉体被认为是一个地理传感器，在向地性转导机制中具有活跃的代谢作用。
Gravity compensation by the horizontal clinostat increases the diameter of amyloplast starch grains of oat (Avena sativa cv. Victory) coleoptile parenchyma cells, as compared to vertically rotated and stationary controls. In dark-grown coleoptile tip parenchyma cells, measured starch grain sizes exhibit a wide distribution of diameters, from approximately 1.5 to approximately 8.0 mum, but fall into three prominent diameter classes. The compensated tissues from both the tip and the subapical region have more starch grains in the larger, and fewer in the smaller size classes, compared to controls. The total number of starch grains per cell, the total plastid number per cell, and cell volume are unaffected by gravity compensation. Amyloplasts with large starch grains are denser, as well as larger in diameter, than those with smaller starch grains. The amyloplast is considered as a geosensor with an active metabolic role in the geotropic transduction mechanism.