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Enhancement in rice seed germination via improved respiratory metabolism under chilling stress
Food and Energy Security ( IF 4.0 ) Pub Date : 2020-07-22 , DOI: 10.1002/fes3.234 Lixiao Nie 1 , Hongyan Liu 1 , Li Zhang 1 , Weiqin Wang 2
Food and Energy Security ( IF 4.0 ) Pub Date : 2020-07-22 , DOI: 10.1002/fes3.234 Lixiao Nie 1 , Hongyan Liu 1 , Li Zhang 1 , Weiqin Wang 2
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Chilling stress is one of the abiotic stresses that severely limited the production of many field crops. The chilling stress during emergence stages of rice severely hampered the process of seed germination and seedling growth and resulted in yield losses. Meanwhile, the development of seed priming has been proved to effectively enhance the seedling establishment of rice under chilling stress. However, the regulating effects of seed priming on the respiratory metabolism during rice seed germination under chilling stress have rarely been explored. In the present study, the effects of two pre‐optimized seed priming treatments, selenium priming (Se) and salicylic priming (SA), were examined under chilling stress. The results revealed that chilling stress significantly reduced the rice seed germination and seedling growth, as well as the respiration rate and ATP contents in rice seeds and seedlings. While seed priming was effective to significantly enhance the respiration rate and ATP levels in rice seeds and seedlings, such positive effects might be induced by the enhanced glycolysis metabolism, as well as the repair and biogenesis of mitochondria. However, the molecular mechanisms in association with the enhanced respiration in primed rice seeds and seedlings under chilling stress still needed to be addressed in future studies.
中文翻译：
通过改善寒冷胁迫下的呼吸代谢提高水稻种子的发芽率
低温胁迫是严重限制许多大田作物产量的非生物胁迫之一。水稻出苗期的低温胁迫严重阻碍了种子的发芽和幼苗生长，并导致产量损失。同时，已证明种子引发的发展可有效增强寒冷胁迫下水稻的幼苗生长。然而，在低温胁迫下，种子萌发对水稻种子萌发过程中呼吸代谢的调节作用很少被探索。在本研究中，在低温胁迫下检查了两种预先优化的种子引发处理（硒引发（Se）和水杨酸引发（SA））的效果。结果表明，低温胁迫显着降低了水稻种子的萌发和幼苗生长，以及水稻种子和幼苗的呼吸速率和ATP含量。尽管启动种子可以有效地提高水稻种子和幼苗的呼吸速率和ATP水平，但这种积极作用可能是由糖酵解代谢增强以及线粒体的修复和生物发生引起的。但是，在低温胁迫下，引发的水稻种子和幼苗中与增强呼吸有关的分子机制仍需要在未来的研究中解决。
更新日期：2020-07-22
中文翻译：
通过改善寒冷胁迫下的呼吸代谢提高水稻种子的发芽率
低温胁迫是严重限制许多大田作物产量的非生物胁迫之一。水稻出苗期的低温胁迫严重阻碍了种子的发芽和幼苗生长，并导致产量损失。同时，已证明种子引发的发展可有效增强寒冷胁迫下水稻的幼苗生长。然而，在低温胁迫下，种子萌发对水稻种子萌发过程中呼吸代谢的调节作用很少被探索。在本研究中，在低温胁迫下检查了两种预先优化的种子引发处理（硒引发（Se）和水杨酸引发（SA））的效果。结果表明，低温胁迫显着降低了水稻种子的萌发和幼苗生长，以及水稻种子和幼苗的呼吸速率和ATP含量。尽管启动种子可以有效地提高水稻种子和幼苗的呼吸速率和ATP水平，但这种积极作用可能是由糖酵解代谢增强以及线粒体的修复和生物发生引起的。但是，在低温胁迫下，引发的水稻种子和幼苗中与增强呼吸有关的分子机制仍需要在未来的研究中解决。
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