期刊文献+

钙提高玉米种子活力的作用研究 被引量:10

SEED VIGOR OF ZEA MAYS L. IMPROVED BY CALCIUM
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摘要 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. The effect of calcium on vigor of Zea mays L. seeds was studied. When seeds were treated with 0-10mmol/L concentrations of CaCl2, the germination percentage and vigor of seeds were increased. As Ca2+ concentration was more than 10mmol/L,the effects on seed viability and vigor decreased. The reasons that Ca2+ raised germination percentage and vigor of seeds might be due to the enhancing activities of amylases in embryo and endosperm,and the accelerating mobilization of stored reserves,e.g.starch and soluble proteins in endosperm. During seed germination, the exogenous EGTA and EDTA could drop seed vigor, but this inhibitory effect was partially removed by the addition of 2.5 and 10mmol/L Ca 2+.
出处 《热带亚热带植物学报》 CAS CSCD 1995年第4期56-60,共5页 Journal of Tropical and Subtropical Botany
基金 广东省科委青年科学基金 国家自然科学基金
关键词 玉米 种子活力 Calcium Seed vigor, Amylases Chelating agent Zea mays L.
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