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Journal of Integrative Agriculture  2022, Vol. 21 Issue (10): 3094-3101    DOI: 10.1016/j.jia.2022.07.012
Special Issue: 水稻耕作栽培合辑Rice Physiology · Biochemistry · Cultivation · Tillage
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Moderate drought alleviate the damage of high temperature to grain quality by improving the starch synthesis of inferior grain in japonica rice
TONG Hui1, 2, DUAN Hua2, WANG Sheng-jun2, SU Jing-ping2, SUN Yue2, LIU Yan-qing2, TANG Liang1, LIU Xue-jun2, CHEN Wen-fu1
1 Rice Research Institute, Shenyang Agricultural University, Shenyang 110866, P.R.China
2 Tianjin Key Laboratory of Crop Genetics and Breeding, Tianjin Crop Research Institute, Tianjin 300384, P.R.China
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摘要  温度和水分是影响水稻产量和品质形成的重要因子,灌浆结实期适度的干旱能够有效的缓解高温胁迫对水稻造成的伤害,但有关其淀粉合成的调控机理尚不清楚。为探明灌浆结实期高温与干旱对水稻淀粉合成的影响及其生理机制,本试验研究了4个不同处理下(对照(CK)、高温(HT)、适度干旱(WS)、高温干旱(HT+WS))常规粳稻淀粉相关酶活性及其基因的表达水平。结果表明高温和干旱对籽粒灌浆的影响主要发生在弱势粒中,并通过调节参与淀粉合成相关酶活性及其主效基因的表达水平,进而影响稻米淀粉的合成。高温和干旱有拮抗作用,适度干旱能够改善高温对稻米品质的影响。


In agricultural production, temperature and moisture are important factors affecting grain yield and quality.  Although moderate drought at the grain-filling stage can effectively alleviate the damage caused by high temperature, the specific regulatory mechanism driving the effect of moderate drought at the high temperature on starch synthesis is still unclear.  To explore the effects and mechanisms of high temperature and moderate drought on rice starch synthesis at the grain-filling stage, the activities of enzymes and expression levels of the genes involved in starch synthesis under four different treatments involving high temperature and/or water stress (CK, HT, WS, and HT+WS) were investigated in this study.  The starch synthesis of a japonica inbred rice was measured under the four treatments during the grain filling.  The results show that the effects of high temperature and moderate drought on grain filling mainly occur in the inferior grains of rice.  Through the regulation of enzymes involved in starch synthesis and the expression levels of their main genes, the synthesis of rice starch can be affected.  Therefore, the high temperature and moderate drought were antagonistic, and moderate drought can alleviate the damage to grain quality at a high temperature by improving the starch synthesis of inferior grains in japonica rice.  This study provides a basis for stress-resistance cultivation and breeding strategies of rice with high temperature tolerance.

Keywords:  high temperature        moderate drought        antagonism        starch synthesis        japonica rice  
Received: 12 May 2021   Accepted: 21 June 2021
Fund: This work was supported by the National Natural Science Foundation of China (U1708231 and 31601248), the China Agriculture Research System of MOF and MARA (CARS-01-49), and the Liaoning Revitalization Talents Program, China (XLYC1807233).
About author:  TONG Hui, E-mail:; Correspondence TANG Liang, Tel: +86-24-88487184, E-mail:; LIU Xue-jun, Tel: +86-22-27796749, E-mail:

Cite this article: 

TONG Hui, DUAN Hua, WANG Sheng-jun, SU Jing-ping, SUN Yue, LIU Yan-qing, TANG Liang, LIU Xue-jun, CHEN Wen-fu. 2022. Moderate drought alleviate the damage of high temperature to grain quality by improving the starch synthesis of inferior grain in japonica rice. Journal of Integrative Agriculture, 21(10): 3094-3101.

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