摘要
选择水培法进行了Cu2+胁迫对牧草种子发芽、幼苗生长及根伸长的影响试验。结果表明,小冠花和沙打旺种子的发芽率和发芽势随Cu2+浓度的升高呈抑制趋势;各牧草种子的根长和苗长随Cu2+浓度的增加而降低,但各牧草种子根系被完全抑制的浓度则各不相同,随着Cu2+浓度的增大各牧草种子的根系抑制率增大。总体看,高丹草和冬牧70黑麦对Cu2+胁迫的耐受程度大于小冠花和沙打旺。
This inhibitory effects of Cu^2＋ stress on seed germination, seedling growth and root elongation for different forage grasses were investigated by hydroponics in designed experimental study. The study suggests that seed germination and seedling growth of Coronilla varia and Astragalus adsurgens Pall all tend to decline with the growing level of Cu^2＋. The growth of the forage grass seed and the seeding root were prohibited with the rising level of the Cu^2＋ , while the effects for complete growth inhabitation differs widely with Cu^2＋ level. With the increasing concentration for Cu^2＋ , the probability for growth inhibition of the forage grass seed roots are likely to go up as well. On average, the inbitory effects from Cu^2＋ stress for Sorghum bicolor and rye of Dongmu No. 70 were lesser than those for Coronilla varia and Astragalus adsurgens Pall.
出处
《三峡环境与生态》
2011年第5期19-23,共5页
Environment and Ecology in the Three Gorges
关键词
牧草
Cu2+胁迫
抑制效应
forage grass
Cu^2＋ stress
inhibitory effect
