NaCl对2种豇豆属植物种子萌发和r幼苗生长的影响

摘要

盐碱地在中国广泛分布,筛选耐盐型牧草对充分利用及改良盐碱地具有重要意义.以2种豇豆属植物滨豇豆和赤小豆为材料,采用0％,0.5％,1.0％,1.5％四种浓度的NaCl模拟盐胁迫,研究盐胁迫对这2种豇豆属植物种子萌发及幼苗生长的影响.结果表明:随着盐浓度的升高,滨豇豆和赤小豆的种子萌发和幼苗生长受到明显抑制,主要体现在,发芽率、 发芽势、 发芽指数、 根长、 胚轴长和幼苗相对含水量都随盐浓度的升高呈下降趋势;和赤小豆相比,滨豇豆的活力指数在不同浓度盐处理下差异不显著,且高盐浓度下其胚轴显著长于赤小豆,表现出较好的耐盐性.%Saline-alkali soil was widely distributed in China, screening salt tolerant forage grasses was very important for the full use and improvement of saline soil. Two kinds of Vigna plnats Adzuki bean and Beach pea were used as materials in this study treated with four salt concentrations: 0％, 0.5％, 1.0％and 1.5％ NaCl to analyze the effect of salt stress on seed germination and growth of two vigna plants. The results showed that, with the increase of salt concentrations, the germination and seedling growth of Adzuki bean and Beach pea were inhibited obviously, showed in the gradual decline of germination rate, germination potential, germination index, root length, hypocotyls length and relative water content. Beach pea had relative good salt tolerance, the decrease of germination rate, root length and relative water content was smooth than that of Adzuki bean with the increase of salt concentrations, seed vigor of Beach pea had no significant differences with the increase of salt concentration, and the decrease of germination index and hypocotyl length was lower than that of Adzuki bean.