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首页> 外文期刊>Acta Physiologiae Plantarum >Spermidine promotes starch degradation to relieve the inhibitory effect of chilling on wheat seed germination
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Spermidine promotes starch degradation to relieve the inhibitory effect of chilling on wheat seed germination

机译：硫氨酸促进淀粉降解以缓解冷却对小麦种子萌发的抑制作用

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How the inhibitory effect of chilling on seed germination can be released is an important question in wheat production. In the present study, two wheat cultivars exhibiting differences in seed germination under chilling resistance were used, and their seeds were subjected to presoaking with spermidine and putrescine. The variations of polyamines and hormones and the carbohydrate in the seeds were measured under chilling stress. The objective of the present study was to investigate the effect of polyamines on wheat seed germination under chilling stress. The results indicated that spermidine could relieve the inhibitory effect of chilling stress on the seed germination of wheat, while putrescine had the opposite effect. Additionally, this specially effect of polyamines on the seed germination of wheat under chilling was related to abscisic acid and gibberellin. Spermidine significantly increased gibberellin levels in seeds and thereby promoted starch degradation in seeds. Additionally, the promotion effect of spermidine on the seed germination under chilling might be related to the increasing of abscisic acid concentration in seeds. However, external application of putrescine led to the excessively abscisic acid concentration in the wheat seeds and may by this reduced chilling resistance in seed germination stage of wheat. Taken together, these results indicated a continuous route of putrescine to spermidine synthesis that promotes chilling resistance in wheat seed germination and polyamine production, through the regulation of abscisic acid and gibberellin contents and starch degradation, to regulate wheat seed germination under chilling stress.
机译：如何释放冷却对种子萌发的抑制作用是小麦生产中的重要问题。在本研究中，使用了两种小麦品种，在冷却抗性下呈现出种子萌发的差异，并用亚硫酸盐和Putrescine进行它们的种子。在冷胁迫下测量种子中多胺和激素和种子中的碳水化合物的变化。本研究的目的是探讨多胺对寒冷胁迫下小麦种子萌发的影响。结果表明，山形可以缓解冷却胁迫对小麦种子萌发的抑制作用，而Putrescine具有相反的效果。此外，多胺对冷却下小麦种子萌发的这种特殊作用与脱钙和赤霉素有关。硫胺胺显着增加了种子中的嗜酸甘油蛋白水平，从而促进了种子中的淀粉降解。另外，亚精胺对冷却下的种子萌发的促进作用可能与种子中脱落酸浓度的增加有关。然而，Putrescine的外部施用导致小麦种子中的过度脱脂酸浓度，并且可以通过这种情况下降低小麦的种子萌发阶段的冷却抗性。总之，这些结果表明，通过调节脱落酸和赤霉素含量和淀粉降解来调节抗粘膜萌发和多胺生产中的普形腐植物的连续路径，促进小麦种子萌发和多胺生产中的抗寒性。

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