孤独的男人-像1的自然变化调节了在温暖的夜间条件下大米粒的重量
Jaspreet Sandhu1, Larissa Irvin1, Anil Kumar Chandaran1
1Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.
Plant physiology
|May 31, 2024
概括
全球变暖增加了夜间温度,影响了大米产量. 一项研究确定了LONELY GUY-Like 1 (LOGL1) 基因是夜间高温压力下大米粒重量的关键调节者.
科学领域:
- 植物生物学 植物生物学
- 遗传学 是一个遗传学.
- 适应气候变化 适应气候变化
背景情况:
- 全球夜间温度的上升速度快于白天温度,对大米 (Oryza sativa) 产量构成重大威胁.
- 高夜间温度 (HNT) 的压力通过降低谷物的重量,大小和生育能力,对大米产量产生负面影响.
- 谷物重量调节的遗传基础,特别是在HNT压力下,尚不清楚.
研究的目的:
- 为了研究在谷物发育过程中在HNT压力下,大米单粒重量 (SGW) 的自然变化.
- 在HNT条件下识别与谷物重量变化相关的遗传位置.
- 阐明已识别的基因在HNT应激耐受性中的作用.
主要方法:
- 全基因组关联分析 (GWAS) 用于在HNT.下识别与SGW相关的位点.
- 将SGW1位点精细映射到LONELY GUY-Like 1 (LOGL1) 基因上.
- 分析LOGL1转录丰度的自然变化及其与SGW的相关性.
- 在HNT下对logl1-突变体和LOGL1过度表达体的表型特征.
- 研究LOGL1在胺生物合成途径中的作用.
主要成果:
- 在HNT下,GWAS确定了与SGW相关的几个位点,SGW1映射到LOGL1.
- 低LOGL1转录水平的米加入在HNT下表现出更高的谷物重量.
- 与野生型相比,logl1突变体在HNT下显示出较高的谷物重量,而LOGL1过度表达者对HNT更敏感.
- 发现LOGL1调节了胺生物合成途径,该途径处于昼夜控制下,并可能被HNT破坏.
结论:
- 基因"孤独的男人" (LOGL1) 在夜间高温压力下,在调节大米粒重量方面发挥着至关重要的作用.
- 在LOGL1的变异提供了一个基因资源,以提高大米适应夜间温度的增加.
- 了解LOGL1在胺生物合成途径中的功能,可以了解大米中HNT应激耐受机制.
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