数字农科院2.0

Abscisic acid synergizes with sucrose to enhance grain yield and quality of rice by improving the source-sink relationship

文献类型: 外文期刊

作者: Tingting Chen ; Guangyan Li +; Mohammad Rezaul Islam ; Weimeng Fu ; Baohua Feng ; Longxing Tao *; Guanfu Fu *

作者机构:

关键词: Rice (Oryza Sativa L; ); Abscisic Acid; Sucrose; Grain Yield And Quality; Assimilates Allocation; Sugar Metabolism

期刊名称: BMC Plant Biology

ISSN: 1471-2229

年卷期: 2019 年 19 卷 1 期

页码:

收录情况: JCR(2021版)

摘要: Background Abscisic acid (ABA) and sucrose act as molecular signals in response to abiotic stress. However, how their synergy regulates the source-sink relationship has rarely been studied. This study aimed to reveal the mechanism underlying the synergy between ABA and sucrose on assimilates allocation to improve grain yield and quality of rice. The early indica rice cultivar Zhefu802 was selected and planted in an artificial climate chamber at 32/24 degrees C (day/night) under natural sunlight conditions. Sucrose and ABA were exogenously sprayed (either alone or in combination) onto rice plants at flowering and 10 days after flowering. Results ABA plus sucrose significantly improved both the grain yield and quality of rice, which was mainly a result of the higher proportion of dry matter accumulation and non-structural carbohydrates in panicles. These results were mainly ascribed to the large improvement in sucrose transport in the sheath-stems in response to the ABA plus sucrose treatment. In this process, ABA plus sucrose significantly enhanced the contents of starch, gibberellic acids, and zeatin ribosides as well as the activities and gene expression of enzymes involved in starch synthesis in grains. Additionally, remarkable increases in trehalose content and expression levels of trehalose-6-phosphate synthase1, trehalose-6-phosphate phosphatase7, and sucrose non-fermenting related protein kinase 1A were also found in grains treated with ABA plus sucrose. Conclusion The synergy between ABA and sucrose increased grain yield and quality by improving the source-sink relationship through sucrose and trehalose metabolism in grains.

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