文献类型： 外文期刊

作者： Duan, Hua ¹ ; Tong, Hui ¹ ; Zhu, An ² ; Zhang, Honglu ² ; Liu, Lijun ² ;

作者机构： 1.Tianjin Acad Agr Sci, Tianjin Crop Res Inst, Tianjin Key Lab Crop Genet & Breeding, Tianjin 300384, Peoples R China

2.Yangzhou Univ, Jiangsu Key Lab Crop Genet & Physiol, Jiangsu CoInnovat Ctr Modern Prod Technol Grain C, Yangzhou 225009, Jiangsu, Peoples R China

关键词： Rice starch; Drought and heat stress; Morphological structure; Physicochemical properties

期刊名称：JOURNAL OF CEREAL SCIENCE （ 影响因子：3.616； 五年影响因子：3.891 ）

ISSN： 0733-5210

年卷期： 2020 年 95 卷

页码：

收录情况： SCI

摘要： High temperature (HT) and drought stress (WS) severely affect rice quality by altering the starch structure in rice. The morphological and physicochemical properties of starches isolated from two rice varieties grown under three stress treatment (HT, WS and WS + HT) during the grain filling stage were investigated. The results showed that WS increased amylose content (AC%) and the proportion of large starch granules (LSG) and made the surface of the starch granule smooth and flat. As a result, a lower relative crystallinity, surface order, swelling power, setback viscosity and gelatinization enthalpy were caused. HT decreased AC% and milled rice rate, but increased chalky rice rate, the number of LSG and the large air space and pits on the surface of the starch granules. As a result, a higher relative crystallinity, surface order, swelling power, setback viscosity and gelatinization enthalpy were caused. Similar results were observed under the treatment of WS + HT, indicating that there is a mild antagonistic effect on rice starch when the HT and WS occur simultaneously.