摘要
盐(NaCl)胁迫下水稻发芽种子的细胞膜透性增加,细胞伤害率加大,胞内K^+、Na^+外渗量增加:淀粉酶活性下降,尤其是α-淀粉酶活性迅速降低,使淀粉水解速率减缓,可溶性糖含量降低,淀粉贮藏组织中淀粉粒形象较密致;同时蛋白酶活性降低,蛋白质转化速率下降,糊粉层胞质中蛋白质残留量增多,干物质消耗减少。耐盐品种“119”水解酶活性受抑程度小于不耐盐品种“78130”,而贮存物质转化速率高于不耐盐品种“78130”,这表明水稻品种耐盐性与上述指标有密切相关关系。
Under Nad stress, the relative permeability of plasma membrane and the leakages of K and Na increased, the cramylase activity declined rapidly, the hydrolysis rate of starch and the content of soluble sugars decreased, the starch grains in the storage tissue of starch was densified. At the same time, the protease activity and the transformation rate of proteins decreased, the residual proteins in the aleurone layer increased and the consumption of dry matters decreased, the hydrolase was inhibited and its extent was lower in salt-tolerant cultivar than in salt-sensitive one. The transformation rate of storage matters was higher in salt-tolerant cultivar than in salt-sensitive one.
出处
《中国生态农业学报》
CAS
CSCD
2002年第4期10-12,共3页
Chinese Journal of Eco-Agriculture
基金
福建省自然科学基金(C96018)
关键词
盐胁迫
发芽水稻种子
质膜透性
物质转化
NaCl stress, Germinated rice seeds, Permeability of plasma membrane, Substance transformation
