酸盐饥饿反应调节器PHR2在Medicago中对抗气囊维护
Peng Wang1,2, Yanan Zhong1, Yan Li1
1Laboratory of Mycology, College of Life Sciences, Hunan Normal University, Changsha, 410081, China.
The New phytologist
|May 28, 2024
概括
酸盐饥饿反应 (PHR) 转录因子调节植物酸盐的摄取和状菌根的共生. PHR2对状体的维持有负面影响,其活动需要严格控制才能在Medicago中成功共生.
科学领域:
- 植物生物学 植物生物学
- 分子植物-微生物相互作用
- 植物生理学 植物生理学
背景情况:
- 酸盐饥饿反应 (PHR) 转录因子是通过P1BS cis元素对植物酸盐吸收的关键调节者.
- PHRs通过调节共生基因来影响状菌根 (AM) 殖民,但它们在状细胞发育中的作用尚不清楚.
- 已知抑制PHR活性的SPX蛋白质,控制Medicago.arbuscule的降解.
研究的目的:
- 调查PHR转录因子在共生相互作用期间状体维持中的作用.
- 为了确定PHR2是否调节了Medicago.com中的状体的发育和维护.
主要方法:
- 在Medicago的基因淘汰和PHR2的过度表达.
- 对酸盐饥饿反应,共生基因表达和真菌殖民的分析.
- 在共生基因中评估体降解和P1BS cis元素功能.
主要成果:
- PHR2是Medicago中酸盐饥饿反应的关键调节者.
- phr2淘汰突变体表现出减少的共生基因表达和真菌殖民,但较少的树枝退化.
- 过度表达PHR2导致了状体降解的增加,这表明它在状体维护方面发挥了负面作用.
结论:
- PHR2 负面调节状体的维持,与其在共生基因表达和殖民中的积极作用形成鲜明对比.
- PHR2和SPX蛋白可能通过部分不同的机制控制状体的维护.
- 对于成功的Medicago共生来说,密切调节含有囊细胞中的PHR2活性是必不可少的.
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