过度表达OsACL5触发了环境依赖的叶子滚动,并减少了大米的粒径
Huafu Mai1,2,3, Tian Qin1,2,3, Huan Wei1,2,3
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, China.
Plant biotechnology journal
|November 15, 2023
概括
这项研究表明,米中的OsACL5调节了热精氨酸 (T-Spm) 水平,影响了植物生长和产量. 过度表达导致叶子滚动和产量降低,而突变者显示出改善的谷物特征,突出了OsACL5作为米育种的关键基因资源.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 像热胺 (T-Spm) 这样的多氨基酸对植物生长和环境适应至关重要.
- 米 (Oryza sativa) 中的T-Spm合成酶ACL5的特定作用仍然没有被描述.
研究的目的:
- 为了研究大米中OsACL5的生物功能.
- 了解T-Spm在植物发育和农学特征中的作用.
主要方法:
- 使用CRISPR/Cas9.5生成了OsACL5的淘汰突变和过度表达 (OE) 线.
- 分析了突变植物和OE植物的生理和农学特征.
- 量化T-Spm含量和乙烯的演变.
主要成果:
- 原始发电植物显示出环境依赖的叶子滚动,较小的粒度,减少1000粒重量和更低的产量.
- 在OE植物中减少的甲基容器面积与减少的叶子水潜力相关.
- 在OE工厂中,T-Spm水平显著增加,而乙烯演化则下降.
- osacl5突变体呈现出增加的谷粒长度,1000粒重量和产量.
- OsACL5通过调解OsDEP1,OsGS3和OsGW2表达,可能会影响谷粒大小.
结论:
- OsACL5调节T-Spm水平,影响环境依赖的叶子滚动和大米的多种农学特征.
- T-Spm信号与乙烯通路相互作用.
- OsACL5是分子育种的宝贵基因资源,旨在提高大米产量和耐压力.
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