大米中糖利用和碳水化合物新陈代谢的干扰 发育虫加剧热应激诱导花粉流产
Xianyue Guan1, Yan Zhang1, Lujian Zhou1
1Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
Plant physiology and biochemistry : PPB
|September 3, 2023
概括
在大米繁殖期间的高温压力会通过破坏粉中的糖和粉代谢来损害花粉的发育. 这导致生育能力和产量下降,突出了受热影响的关键碳水化合物通路.
科学领域:
- 植物生理学 植物生理学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 高温 (HT) 压力对大米的繁殖发育产生负面影响,特别是尖端的生育能力和产量.
- 在HT压力下了解碳水化合物代谢对于提高作物弹性至关重要.
研究的目的:
- 研究HT暴露对发育中的水甲虫糖成分和碳水化合物代谢的影响.
- 将这些代谢变化与花的生育能力和花粉的活力联系起来.
主要方法:
- 控制的气候条件与不同的温度调节.
- 分析糖的组成,粉的沉积和粉中的酶活动.
- 与碳水化合物代谢相关的基因表达分析.
主要成果:
- 超高温应激减少了粉沉积,并破坏了糖/粉在人体中的分布.
- 在HT下,糖与黑色素的比率增加,表明糖的利用受损.
- HT 损害了从壁到胞组织的糖糖转移.
- 关键酶活动 (逆转酶,六酶,AGPase) 被抑制,而其他 (糖合成酶,果酶) 被增强.
结论:
- 由HT引起的花粉流产与水中糖利用的中断有关.
- 在壁中抑制OsCWIN3是HT诱导的代谢障碍的一个关键因素.
- 准碳水化合物代谢途径可以提高大米的耐热性.
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