高级检索+
何宇清, 王炳锐, 王建波. 镉胁迫下小麦根尖分生细胞中Ca2+分布的变化[J]. 植物科学学报, 2002, 20(6): 417-420.
引用本文: 何宇清, 王炳锐, 王建波. 镉胁迫下小麦根尖分生细胞中Ca2+分布的变化[J]. 植物科学学报, 2002, 20(6): 417-420.
HE Yu-Qing, WANG Bing-Rui, WANG Jian-Bo. Changes of Ca2+ Distribution in Root Apical Meristematic Cells of Wheat under Cadmium Stress[J]. Plant Science Journal, 2002, 20(6): 417-420.
Citation: HE Yu-Qing, WANG Bing-Rui, WANG Jian-Bo. Changes of Ca2+ Distribution in Root Apical Meristematic Cells of Wheat under Cadmium Stress[J]. Plant Science Journal, 2002, 20(6): 417-420.

镉胁迫下小麦根尖分生细胞中Ca2+分布的变化

Changes of Ca2+ Distribution in Root Apical Meristematic Cells of Wheat under Cadmium Stress

  • 摘要: 运用透射电镜细胞化学方法对镉胁迫下小麦根尖分生细胞中Ca2+分布的变化进行了观察。在正常生长条件下,Ca2+广泛分布于细胞质、细胞核、细胞间隙中,特别是液泡中有大量的Ca2+;在镉胁迫条件下,细胞质基质内Ca2+减少,而细胞核、质膜与细胞壁之间、细胞壁中Ca2+明显增多,细胞液泡化,液泡中仍有较多Ca2+.结果表明,Cd2+引起细胞中原有Ca2+分布发生明显变化,这很可能引起细胞生理功能紊乱,进而影响植物的生长。

     

    Abstract: Changes of Ca2+ distribution in root apical meristematic cells of wheat under cadmium stress were observed with electron microscopic-cytochemical method.When the roots grew in non-cadmium environment,it was shown that the calcium antimonates distributed in cytoplasm,nucleus and intercellular spaces,especially in the vacuoles of cytoplasm.When the roots grew in cadmium stressed environment,the amount of calcium antimonates in cytoplasm decreased,while the amount of calcium antimonates in the nucleus,between plasma membrane and cell wall,and in cell wall increased.Moreover,the cells vacuolizated,and there were some calcium antimonates in vacuoles.These results indicated that cadmium could disturb cellular metabolism by disrupting Ca 2+ homeostasis and affect the growth of roots.

     

/

返回文章
返回