Delayed Sowing Date Improves Rice Cooking and Taste Quality by Regulating the Quantity and Quality of Grains Located on Secondary Branches
文献类型： 外文期刊
作者： Xu, Congshan 1 ; Lu, Bo 1 ; Liang, Limin 1 ; Yang, Fei 1 ; Ding, Chao 4 ; Yan, Feiyu 5 ; Zhou, Yan 1 ; Jiang, Zhengrong 1 ; Liu, Zhenghui 1 ; Ding, Yanfeng 1 ; Li, Weiwei 1 ; Li, Ganghua 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Agron, Nanjing 210014, Peoples R China
2.Minist Agr, Key Lab Crop Physiol Ecol & Prod Management, Nanjing 210014, Peoples R China
3.Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210014, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Food Crops, Nanjing 210014, Peoples R China
5.Huaiyin Inst Technol, Sch Life Sci & Food Engn, Huaian 223003, Peoples R China
6.Natl Engn & Technol Ctr Informat Agr, Nanjing 210014, Peoples R China
关键词： sowing date; grain quality; starch synthesis enzyme; grains located on different positions
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 6 期
页码：
收录情况： SCI
摘要： Grains located on different positions of the panicle differed in grain weight and quality performance, however, the comprehensive effect of sowing dates on physiological and quantitative characteristics of grains located on different positions still remains unclear. In this study, a field experiment was conducted with two japonica rice cultivars, Nanjing 9108 and Ningjing 7, under 3 sowing dates (S1, 30th April; S2, 30th May; S3, 30th June). Delayed sowing treatments increased before-heading mean temperature (Tmean), day temperature (Tday), night temperature (Tnight) and mean solar radiation (Smean) for 0.94 degrees C, 0.99 degrees C, 1.23 degrees C, and 1.04 MJ, respectively, while decreased growth duration (GD) for 13.4 days, with 30 days delaying sowing date. Elevated before heading thermal resources and shortened GD contributed to enlarged panicle size via enhancing number of grains on secondary branches (SG) and led to higher ratio of SG per unit area (SG%). Meanwhile, delayed sowing decreased after heading Tmean, Tday, Tnight and Smean by 0.84 degrees C, 1.23 degrees C, 1.13 degrees C, and 2.12 MJ, respectively, with 30 days delaying sowing, and further enhanced rice stickiness (ST), peak viscosity (PKV) and breakdown (BD), but suppressed hardness (HD), amylose content (AC), cold pasting viscosity (CPV), hot pasting viscosity (HPV) and setback (SB) of SG, whilst grains on primary branches (PG) di no significant differences. Elevated taste and cooking quality of SG under delayed sowing was regulated by slower grain filling rate, which is largely regulated by AGPase and GBSS. Compared to PG, SG has better physiochemical, texture properties and RVA profiles due to its slower starch biosynthesis. The above results suggested that physiological (starch biosynthesis of SG) and quantitative parameters (amount of SG) of the rice population should be referred simultaneously to improve rice cooking and taste quality.
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