NaCl胁迫对西瓜种子发芽的影响

采用室内培养试验方法,研究了不同浓度的NaCl胁迫对西瓜种子发芽的影响。结果表明,随着NaCl胁迫浓度的增大,种子萌发的抑制作用明显增强,浓度为25 mmol/L,芽鲜重、芽干重比对照高;浓度为25～50 mmol/L,发芽率稍高于对照,其余的都低于对照。发芽率、芽长、根长、芽鲜重、根鲜重、芽干重、根干重,随着NaCl胁迫浓度的增加呈下降趋势,且发芽率、芽长、根长、芽鲜重、根鲜重、芽干重、根干重的抑制率与NaCl胁迫浓度呈对数线性相关。

Effect of NaCl Stress on Seed Germination of Watermeion

The effect of watermelon seed germination under NaCl stress was stuied. The results showed that as NaCl stress concentration rose, the inhibitive effect on the seed germination was obviously increased. When NaCl stress concentration was at 25 mmol/L, the weight of fresh bud and the weight of dried bud were a little higher than those of CK and when NaCl stress concentration was 25 -50 mmol/L,the germination percentage was a little higher compared with CK, but for others. The germination percentage and bud and root length, weight of fresh root and bud, weight of dried root and bud, were decreased with the increase of NaCl stress concentration. Linear correlations were found between the inhibition rate of germination percentage, bud and mot length, weight of fresh root and bud, weight of dried root and bud and the NaCI stress concentration.