转录因子MdHB52通过调节果根茎中的甲基斯酸盐分泌来调节的吸收
Xuewen Zhao1, Zhongli Zhou1, Mengke Li1
1College of Horticulture, China Agricultural University, Beijing 100193, China.
Plant physiology
|September 18, 2025
概括
了解果根茎中 (P) 缺乏是作物产量的关键. 这项研究揭示了MdHB52基因如何通过控制甲基斯酸盐 (MeJA) 水平来调节P吸收,为培育P耐受品种提供了洞察力.
科学领域:
- 植物生物学 植物生物学
- 农业科学 农业科学
- 遗传学 遗传学 是一个
背景情况:
- (P) 缺乏是农业的一个主要限制,影响植物生长和生产率,特别是在果种植中.
- 控制果根茎对低P (LP) 压力的反应的分子机制尚不清楚.
研究的目的:
- 通过多omics方法阐明果根茎对低P压力的反应的分子机制.
- 确定参与果根茎低P耐受性的候选基因和途径.
主要方法:
- 在P-耐受性 (BC) 和P-敏感性 (M9) 果根茎的后代上使用大量分离分析测序 (BSA-seq) 和RNA测序.
- 综合变异数据,转录水平和功能注释来预测候选基因.
- 进行了根排泄物代谢分析和基因表达与甲基斯蒙酸盐 (MeJA) 生物合成之间的关联分析.
主要成果:
- 确定了24个与低P耐受性相关的候选基因.
- 在LP压力下,在P耐受性根茎 (BC) 中显示出更高的MeJA分泌.
- 证明MdHB52抑制了MeJA生物合成;沉默MdHB52增加了MeJA和P含量.
- 在P耐受性根茎中,MdHB52中的一个促进物多态性破坏了MYBCORE cis元素,增强了MeJA分泌和P吸收.
结论:
- 该研究确定了关键候选基因,包括MdHB52,这对果根茎中低P耐受性至关重要.
- MdHB52通过调节MeJA生物合成,在P摄取中发挥调节作用.
- 果根茎中MdHB52促进体的遗传变异有助于提高果根茎的P效率,为育种计划提供了目标.
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