单核转录组揭示了时空共生感知和Medicago的早期反应
Zhijian Liu1, Jun Yang2, Yanping Long1
1Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology (SUSTech), Shenzhen, China.
Nature plants
|September 25, 2023
概括
豆类-树生物共生涉及宿主植物的快速基因表达变化. 这项研究揭示了对结节因子治疗的动态,细胞特异的根反应,突出了早期防御抑制和关键基因在共生中的作用.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 微生物学 微生物学
背景情况:
- 豆类-类生物共生对于固有关键.
- 建立共生需要精确的,特定于时间和细胞的植物反应.
- 在微生物识别后,宿主根中的早期分子事件尚未完全理解.
研究的目的:
- 在因子治疗后,对Medicago truncatula根的动态基因表达变化的特征.
- 在早期共生建立期间调查细胞类型特定的转录重编程.
- 阐明MtFERONIA (MtFER) 和LysM域受体类激酶3 (LYK3) 在树枝生物共生中的作用.
主要方法:
- 在结节因子治疗后30分钟,6小时和24小时进行Medicago结节根的单核RNA测序 (snRNA-seq).
- 全球和细胞类型特定的基因表达模式的分析.
- 研究与防御,黄化合物合成和共生固定相关的基因模块.
主要成果:
- 在30分钟后,根表皮和皮质发生了严重的全球基因表达重编程,在6小时后基本恢复.
- 植物防御反应基因在早期被激活,随后在非美里系统细胞中被抑制.
- 对于根茎细胞招募至关重要的黄酸合成酶基因在30分钟后在皮质细胞中高度表达.
- MtFERONIA (MtFER) 和LYK3对共生信号表现出类似的反应,MtFER被LYK3酸化并参与共生.
结论:
- 早期的共生反应涉及快速,短暂的,细胞特异性基因表达在Medicago truncatula根中的重编程.
- 这项研究确定了关键的基因和途径,涉及在单细胞水平上启动豆类-树生物共生.
- MtFERONIA和LYK3在共生信号通路中发挥着关键作用,扩大了对它们相互作用的理解.
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