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来自Bacillus的挥发性五甲基可通过激活基于减少的Fe吸收系统来缓解植物的铁缺乏症

Taimeng Tan¹, Lili Tao¹, Yuling Zhang¹

¹Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Jiangsu Provincial Key Laboratory of Coastal Saline Soil Resources Utilization and Ecological Conservation, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, China.

Plant biotechnology journal

|October 28, 2025

概括

百日菌 velezensis SQR9 挥发性有机化合物 (VOC) 通过上调Fe缺陷基因和氧化 (NO) 积累来增强植物的铁 (Fe) 吸收. 五甲被认为是促进植物Fe营养的关键VOC.

科学领域:

植物生物学植物生物学
微生物学微生物学
生物化学生物化学

背景情况:

铁 (Fe) 对植物生长至关重要,根球微生物影响Fe营养.
微生物影响植物Fe吸收的机制尚未完全理解.
细菌产生的挥发性有机化合物 (VOC) 正在成为植物微生物相互作用中的信号分子.

研究的目的:

研究Bacillus velezensis SQR9衍生的VOCs对Arabidopsis中铁的吸收的影响.
阐明了由VOC介导的Fe吸收增强背后的分子机制.
确定特定的VOC,负责促进植物Fe营养.

主要方法:

在铁有限的条件下,Arabidopsis thaliana暴露在SQR9挥发性有机化合物中.
进行了基因表达分析 (FIT,FRO2,IRT1) 和生化分析 (氧化积累).
用基因淘汰突变物来确认基因功能;化学分析确定了活性VOCs.

主要成果:

SQR9 挥发性有机化合物显著改善了铁的吸收,叶绿素含量,生物质和根部发育.
观察到Fe吸收基因 (FIT,FRO2,IRT1) 的升级和氧化的积累.
五甲被确定为一种关键的活性VOC,调解NO信号,增强Fe吸收.

结论:

百日菌 velezensis SQR9 挥发性有机物,特别是甲,通过氧化信号促进植物的铁吸收.
这种机制涉及Arabidopsis中关键的铁吸收相关基因的上调.
SQR9显示出作为一种促进植物生长的草原细菌在作物中的铁生物强化中的潜力.

关键词:

这种病原体是Bacillus velezensis.铁的吸收铁的吸收氧化信号的使用方法五分十三是什么意思五分十三是什么意思植物与微生物的相互作用基于减少的Fe吸收机制树根球的信号传递.挥发性有机化合物挥发性有机化合物

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