外源Ca^(2+)对离体菠菜叶片衰老的影响  

EFFECTS OF E OGENOUS Ca^(2+) ON SENESCENCE OF DETACHED SPINACH LEAVES

作　　者：种康[1] 敬兰花[1] 杨成德[1] 

机构地区：[1]兰州大学生物系,兰州730000

出　　处：《西北植物学报》1993年第3期179-185,共7页Acta Botanica Boreali-Occidentalia Sinica

摘　　要：以叶绿素、蛋白质含量为衰老指标,研究了Ca^(2+)在离体菠菜叶片衰老过程的效应。同时,采用同位素示踪技术研究了光照对离体菠菜叶片吸收,累积Ca^(2+)的影响;实验结果表明,0—10mmol/L Ca^(2+)能使菠菜叶片维持较高含量的叶绿素及各种蛋白质组分。在光、暗条件下,叶片均能吸收外源Ca^(2+),而光照能促进叶片对Ca^(2+)的吸收,暗处理3天的叶片,尚能在分离的叶绿体组分中发现^(45)Ca^(2+),占叶片总放射强度的0.5%。Effects of exogenous Ca^(2+) on content of chlorophylls and proteins during the senescence of detached spinach leaves were studied: at the same time, the relation between accumulate of exogenous Ca^(2+) in the detached leaves and light treatment was analysed with isotopic tracer technique. The results showed that treatment of 0-10mmol/L Ca^(2+) at 7-day-dark made content of the chlorophylls and the proteins keep up and that the leaves can absorb Ca^(2+) at the light as well as at the darkness, and the light promoted clearly accumulate of ^(45)Ca^(2+) in the leaves, meanwhile, at 3-day-dark-treatment, a radioactive calcium can be determined in the chloroplast fraction.

关 键 词：菠菜 衰老 钙离子 叶 

分 类 号：S636.101[农业科学—蔬菜学]