盐胁迫对藜麦种子萌发特性的影响

[目的]研究不同浓度盐胁迫对藜麦种子萌发特性的影响。[方法]对不同浓度NaCl处理下藜麦种子的各项发芽指标进行差异分析。[结果]随着NaCl浓度的增加,藜麦种子的初始发芽时间和萌发高峰均随之推迟,发芽率、发芽势、发芽指数、活力指数、根长、苗高及幼苗鲜重均呈逐渐下降的趋势,而相对盐害率逐渐升高。1.0%的NaCl胁迫下,藜麦种子的发芽率、发芽势、活力指数、相对盐害率及根长与对照相比差异不显著;当NaCl浓度高于2.0%时,藜麦种子的发芽率、发芽势、发芽指数、活力指数、根长、苗高及幼苗鲜重均显著低于对照,而相对盐害率显著高于对照;3.0%盐胁迫下种子萌发完全受到抑制。[结论]藜麦能在01.0%的盐浓度范围内生长良好,是一种高耐盐作物。该研究结果可为藜麦在盐碱地的开发利用和耐盐作物新品种选育提供参考。

Effect of Salt Stress on Seed Germination Characteristics of Quinoa

[Objective]The variation of seed germination indices under the treatment of different contents of NaCl were analyzed. [Method] Differences of germination indexes for quinoa seeds of different NaCl concentration treatments were analyzed. [ Result] With the increasing of NaCl concentration, the initial germination time and germination peak of quinoa seeds were delayed, germination rate, germination potential, germination index, viability index, root length,seedling length and fresh weight were gradually decreased, while relative salt injury rate was gradually increased. The germination rate, germination potential, viability index, relative salt injury rate and root length didn′t show signifi-cant differences compared with control when the NaCl contents were less than 1. 0％. But when the contents were above 2. 0％, the germina-tion rate, germination potential, germination index, viability index, root length, seedling length and fresh weight were obviously lower than control,and relative salt injury rate was significantly higher than control;seed germination was inhibited completed when the contents were 3％. [Conclusion]It indicated that quinoa seeds could be resistant to high-concentration salt and grew well in the salt content range of 0-1. 0％. The study provided a reference for the development and utilization of quinoa in saline-alkali land and the breeding of salt tolerant varieties.