MORE FLORET1通过负调节二倍体和四倍体米中关键的面膜基因来控制米的发展
Zijun Lu1,2,3,4,5, Lianjun Zhu1,3,4,5, Guobin Liang1,3,4,5
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China.
Plant physiology
|March 20, 2024
概括
精确控制MORE FLORET1 (MOF1) 表达对于米的雄性生育能力至关重要. MOF1调节关键的纹形基因,其破坏导致双倍体和多倍体米的男性不育.
科学领域:
- 植物科学 植物科学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 杂交大米育种的目的是提高产量,但多倍体大米中雄性生育调节的研究不足.
- 更多的FLORET1 (MOF1),一个MYB转录因子,以前与新四平状米的男性不育有关.
- MOF1表达力学在男性生育能力中的确切作用尚不清楚.
研究的目的:
- 研究MOF1表达力学在调节大米男性生育能力中的作用.
- 阐明MOF1控制体发育和花粉形成的分子机制.
- 探索MOF1的潜力,开发多体雄性无菌线,用于杂交米育种.
主要方法:
- 对mof1突变体和MOF1过度表达线在二倍体和四倍体水中的anther发展的分析.
- 基因表达分析关键的 tapetal 发育基因.
- 用DNA亲和力净化测序 (DAP-seq),光酶活性测定和电泳性移动性转移测定 (EMSA) 来确定MOF1的转录调节.
主要成果:
- MOF1突变导致延迟的面膜退化和异常的花粉壁形成,导致男性不育.
- 宫外MOF1表达在后期阶段扰乱了表皮细胞重组,也导致男性不育.
- MOF1负面调节了五个关键的面膜基因 (CYP703A3,OsABCG26,PTC1,PKS2,OsABCG15) 并直接抑制了PKS2的转录.
结论:
- 精确的时间控制MOF1表达对于大米中雄性繁殖至关重要.
- MOF1充当了关键基因的转录抑制剂,这些基因参与了面膜发育和花粉形成.
- 了解MOF1的监管作用有助于开发多体雄性无菌线,用于先进的杂交米育种.
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