开花后冷胁迫对水稻(Oryza sativa L)淀粉理化性质的影响。

The effects of chilling stress after anthesis on the physicochemical properties of rice (Oryza sativa L) starch.

机构信息

Jiangsu Key Laboratory of Crop Genetics and Physiology & Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China.

Rice Research Institute of Guizhou Province, Guiyang, China.

出版信息

Food Chem. 2017 Dec 15;237:936-941. doi: 10.1016/j.foodchem.2017.06.039. Epub 2017 Jun 8.

Abstract

This study investigates the effect of chilling stress, over a period of three days after anthesis, on the physicochemical properties of starches derived from six rice cultivars. Chilling stress significantly affected the grain characteristics and physicochemical properties of rice starches, except for those of two varieties, NJ 9108 and ZD 18. In the other four rice cultivars subjected to chilling stress, the content of medium, and large sized granules showed a decrease, and an increase, respectively. Amylose content increased as a result of chilling stress, thereby resulting in starch with a lower swelling power, water solubility, and higher retrogradation enthalpy and gelatinization temperature. Chilling stress led to deterioration of cooked rice quality as determined by the pasting properties of starch. This study indicated that among the cultivars studied, the two rice varieties most resistant to chilling stress after rice anthesis were NJ 9108 and ZD 18.

摘要

本研究调查了开花后三天的冷藏胁迫对来自六个水稻品种的淀粉理化性质的影响。冷藏胁迫显著影响了除两个品种 NJ 9108 和 ZD 18 以外的稻谷淀粉的颗粒特性和理化性质。在另外四个受到冷藏胁迫的水稻品种中,中、大颗粒的含量分别减少和增加。直链淀粉含量因冷藏胁迫而增加,导致淀粉的膨胀力、溶解度降低,回生焓和糊化温度升高。冷藏胁迫导致淀粉的糊化特性决定的米饭蒸煮品质恶化。本研究表明,在所研究的品种中,开花后对冷藏胁迫最具抗性的两个水稻品种是 NJ 9108 和 ZD 18。

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