PEG模拟干旱胁迫对油莎豆茎豆萌发的影响

Effect of PEG Simulated Drought Stress on Seed Germination of Tiger Nut

摘要:

为探究油莎豆在干旱环境中茎豆的萌发能力，以油莎豆茎豆为试验材料，采用不同浓度PEG-6000溶液模拟干旱环境，测定各处理条件下油莎豆茎豆萌发期相关形态指标。结果表明，PEG浓度低于10%对油莎豆茎豆的发芽势、发芽率及根、芽生长无显著影响，当PEG浓度在15%~25%时，油莎豆茎豆的发芽势、发芽率、发芽指数、活力指数、抗旱指数、根长、芽长及幼苗鲜重均表现出持续下降趋势。但在25% PEG浓度下，油莎豆茎豆可少量萌发，说明油莎豆的抗旱能力较强，适宜在中低干旱地区种植。

Abstract:

In order to explore the germination ability of tiger nut seeds in arid environment, this study used tiger nut stem beans as materials, and used PEG-6000 solutions with different concentrations to simulate arid environment, and determined the relevant morphological indexes of tiger nut seeds under the treatments during germination period. The results showed that PEG concentration below 10% had no significant effect on the germination rate, radicle and germ growth of tiger nut stem beans. When PEG concentration was between 15%-25%, stem beans' germination potential, germination rate, germination index, vigor index, drought resistance index, root length, bud length and fresh weight of seedlings all showed a continuous downward trend. However, at the high concentration of 25% PEG, the stem beans of tiger nut could still germinate in a small amount, indicating that stem beans of tiger nut had strong drought resistance and were suitable for planting in middle and low arid areas.