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詹振楠, 王文娟. 种子引发对盐胁迫下枸杞种子萌发的影响[J]. 四川林业科技, 2018, 39(4): 26-30. DOI: 10.16779/j.cnki.1003-5508.2018.04.006
引用本文: 詹振楠, 王文娟. 种子引发对盐胁迫下枸杞种子萌发的影响[J]. 四川林业科技, 2018, 39(4): 26-30. DOI: 10.16779/j.cnki.1003-5508.2018.04.006
ZHAN Zhen-nan, WANG Wen-juan. Effects of Seed Priming on Lycium barbarum Seed Germination Under Salt Stress[J]. Journal of Sichuan Forestry Science and Technology, 2018, 39(4): 26-30. DOI: 10.16779/j.cnki.1003-5508.2018.04.006
Citation: ZHAN Zhen-nan, WANG Wen-juan. Effects of Seed Priming on Lycium barbarum Seed Germination Under Salt Stress[J]. Journal of Sichuan Forestry Science and Technology, 2018, 39(4): 26-30. DOI: 10.16779/j.cnki.1003-5508.2018.04.006

种子引发对盐胁迫下枸杞种子萌发的影响

Effects of Seed Priming on Lycium barbarum Seed Germination Under Salt Stress

  • 摘要: 以抗旱性、适应性强的“宁杞1号”为实验材料,用100 mmol·L-1 NaCl溶液对其种子进行引发处理。采用纸上发芽床法,以蒸馏水为对照,设置6个NaCl浓度梯度(20 mmol·L-1、40 mmol·L-1、60 mmol·L-1、80 mmol·L-1、100 mmol·L-1、120 mmol·L-1)模拟盐胁迫,研究种子引发处理对盐胁迫下枸杞种子萌发过程的影响。结果表明:随着盐浓度的增加,无论种子是否被引发枸杞种子的发芽速度均明显减慢,发芽进程表现出显著性延迟,最终发芽率、发芽势和发芽指数均显著下降;在相同盐浓度胁迫下,种子引发均不同程度地提高了种子的发芽速度,加速了萌发进程,引发种子的发芽势、发芽指数与未引发种子相比均有显著性提高。由此表明,种子引发处理可以一定程度地缩短种子萌发进程,并提高种子萌发的整齐度,但对枸杞种子最终萌发率的影响不显著。

     

    Abstract: Lycium barbarum was a kind of representative perennial shrub with drought and salinity tolerance,and it often grew in deserts of China's northwest.Seeds of NingQi No.1 were primed with 100 mmol·L-1 NaCl.By petri dish techniques,the primed seeds under H2O(control) were subjected to salt stressed of 6 NaCl concentrations (20 mmol·L-1、40 mmol·L-1、60 mmol·L-1、80 mmol·L-1、100 mmol·L-1、120 mmol·L-1).The effects of the seed priming and salt stress on seed germination were then investigated.The results showed that with or without priming,germination speed of NingQi No.1 seeds slowed down significantly.The germination percentage,germination energy and germination index all declined obviously with increased NaCl concentration,and the germination process showed a significant delay.As compared with unprimed seeds under the same NaCl concentration,primed seeds increased germination speed and shortened the germination process in different extent.The germination energy and germination index of the primed seed were significantly higher than those of unprimed seeds.The results suggested that L.barbarum seed priming shortened the germination process under salt stress,improved the uniformity of seed germination,but the impact on the final germination rate was not significant.

     

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