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关于在干旱和洪水条件下种植的水之间的质量差异和生理特征的代谢学研究

Guan Wang¹, Xinru Shen¹, Chenyang Bai¹

¹Faculty of Agronomy Jilin Agricultural University/National Crop Variety Approval and Characterization Station, Chang Chun 130118, China.

|June 10, 2023

概括

干式栽培降低了米的质量,原因是粉合成较低,粉度较高. 质量形成的关键时期是开花后8~15天,影响了米粒的发育.

科学领域:

农业科学农业科学
植物生理学植物生理学
生物化学生物化学

背景情况:

米的质量受到种植方法的显著影响,干燥种植通常导致产量较低.
了解干和洪水栽培大米之间的生理和代谢差异对于提高谷物质量至关重要.

研究的目的:

阐明干栽培大米与洪水栽培大米相比质量下降的生理和代谢基础.
确定干种米中质量形成的关键发育窗口.

主要方法:

在干旱和洪水条件下对"龙大18"大米的生理特征,粉合成酶活性和谷物代谢学进行比较分析.
测量棕,磨米和全磨米的比率,酶活性 (AGPase,SSS,SBE,GBSS) 和生物化学成分 (氨糖,蛋白质).
分析与粉合成酶相关的基因表达,并在关键生长阶段识别关键代谢物.

主要成果:

干燥栽培导致棕,磨米和全磨米的比率降低,并且降低了AGPase,SSS和SBE酶的活性.
相反,干燥种植导致了增加的状性,状粒度,粉糖,蛋白质含量和GBSS活性.
代谢分析显示,在开花8天后,酸盐,甘氨酸和甲氨酸 (DAF) 的上调显著,在DAF15时,酸,酸和α-甲酸的升高.

结论:

8至15 DAF之间的时期被确定为干种的质量决定的关键阶段.
在早期阶段 (8 DAF),氨基酸作为呼吸道中的信号分子和基质,以应对干旱条件并支持蛋白质合成.
后期阶段 (15 DAF) 显示出过度的粉素合成,加速生殖生长,导致谷物的过早老化.

关键词:

干式培养的水.代谢学代谢学代谢学大米质量大米质量粉代谢酶活动的活性.

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