Pb^(2+)胁迫对水稻种子萌发及幼苗生长影响的研究

Study on the Effect of Seed Germination and Seedling Growth of Rice under Pd^(2+) Stress

研究了不同浓度Pb2+离子胁迫下水稻种子萌发及幼苗生长状况,结果表明:在Pb2+浓度不高于100 mg/L时对水稻种子的发芽率短期内有一定的促进作用,但所有处理的种子的简化活力指数均低于对照,随着浓度的提高,Pb2+离子胁迫对水稻种子萌发的抑制作用越大,水稻种子的简化活力指数、幼苗高度、幼苗鲜重、根鲜重明显降低;Pb2+离子胁迫下对水稻种子根生长的抑制作用大于芽。

Studied the effect of Pb^2＋ stress on rice seed germination and growth of seedling, The result showed that： In shortage, The germination percent increase slight at the lower Pb^2＋ concentration than 100 mg/L to rice seeds, but the simple vigor index was lower than comparison to every management, The higher the Pb^2＋ concentration, the bigger the limit effect to seedling growth, including simple vigor index, seedling high, seedling fresh weight, and weight of fresh roots. The limit effect to the growth of root is bigger than the bud.