钙提高玉米种子活力的作用研究

• 作 者: 宋松泉 陈健 傅家瑞
• 机 构: 中山大学生命科学学院
• 出 处: 热带亚热带植物学报
• 发表日期: 1995年04期
• 关键词: 种子活力 淀粉酶活性 种子发芽率 种子萌发过程 可溶性蛋白 贮藏物质 螫合剂 傅家瑞 种子生理 蛋白水解酶

本文以玉米种子为材料，研究了钙对种子活力的影响．在０—４０ｍｍｏｌ／ＬＣａ（２＋）的浓度范围，低浓度的Ｃａ（２＋）提高种子的发芽率和活力，最适浓度为１０ｍｍｏｌ／Ｌ，超过此浓度Ｃａ（２＋）的促进作用减弱．Ｃａ（２＋）提高种子发芽率和活力的原因可能是Ｃａ（２＋）促进胚和胚乳中α－和β－淀粉酶的活性，加速胚乳中贮藏物质如淀粉和可溶性蛋白的动员．在种子萌发过程中，ＥＧＴＡ和ＥＤＴＡ能降低种子活力，２．５和１０ｍｍｏｌ／ＬＣａ（２＋）能部分解除ＥＧＴＡ和ＥＤＴＡ的抑制作用．

In this paper, corn seeds were used to study the effect of calcium on seed vigor. Low concentrations of Ca (2+) increased seed germination rate and vigor at concentrations ranging from 0 to 40 mmol / L Ca (2+), with an optimum concentration of 10 mmol / L, beyond which the promotion of Ca (2+) was weakened. The reason Ca (2+) increases seed germination and vigor may be that Ca (2+) promotes the activity of α- and β-amylase in embryos and endosperms and accelerates the mobilization of stored substances such as starch and soluble proteins in the endosperm. EGTA and EDTA reduced seed vigor during seed germination, while 2.5 and 10 mmol / L (2+) partially relieved the inhibitory effect of EGTA and EDTA.