Regulation of Rice Grain Quality by Exogenous Kinetin During Grain-Filling Period

文献类型： 外文期刊

第一作者： Xiao, Yunhua

作者： Xiao, Yunhua;Dong, Yating;Zhou, Meng;Wang, Yingfeng;Liu, Xiong;Lu, Xuedan;Zhang, Guilian;Wang, Feng;Tang, Wenbang;Deng, Huabing;Xiao, Yunhua;Dong, Yating;Zhou, Meng;Wang, Yingfeng;Liu, Xiong;Lu, Xuedan;Zhang, Guilian;Wang, Feng;Deng, Huabing;Xiao, Yunhua;Dong, Yating;Wang, Yingfeng;Liu, Xiong;Lu, Xuedan;Zhang, Guilian;Wang, Feng;Tang, Wenbang;Deng, Huabing;Tang, Wenbang

作者机构：

关键词： rice (Oryza sativa L.); rice grain quality; cytokinin; cooked rice elongation; starch granule morphology; rice grain swelling rate

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 3 期

页码：

收录情况： SCI

摘要： Cytokinins (CKs) play important functions in plant growth and development and in response to adversity stress. However, little is known about the role CK plays in rice grain quality. We hypothesized that exogenous cytokinins could improve rice grain quality by regulating physiological traits and genes related to starch synthesis. Therefore, we exogenously applied different concentrations of kinetin (KT), an exogenous CK, during the grain-filling period. Our results show that all the different concentrations of exogenous KT treatments resulted in a significant increase in thousand-grain weight. In particular, chalkiness and chalky grain rate were significantly reduced, and gel consistency (GC) content and alkali spreading value (ASV) were significantly increased in 10-8 M KT treatment. Meanwhile, the exogenous application of 10-8 M KT positively affected the transcription of some starch synthesis-related genes, which was in contrast to the 10-5 M KT treatment. In conclusion, the exogenous application of appropriate concentrations of KT during the grain-filling period can ultimately affect rice grain quality by regulating the changes in the relevant indicators, such as appearance quality (AQ) and eating and cooking qualities (ECQ).

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