Chemistry-specific responses due to rice-microbe interactions in the rhizosphere to counteract mefenacet stress
文献类型: 外文期刊
第一作者: Ma, You-Ning
作者: Ma, You-Ning;Ni, Yan-Xia;Cao, Zhao-Yun;Pan, Jiu-Yue;Tuwang, Man-Cuo;Yang, Huan;Chen, Ming-Xue;Mou, Ren-Xiang
作者机构:
关键词: Mefenacet; Rhizosphere microbiome; Chemistry of microbe-plant interactions
期刊名称:PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY ( 影响因子:3.963; 五年影响因子:4.454 )
ISSN: 0048-3575
年卷期: 2021 年 179 卷
页码:
收录情况: SCI
摘要: The widespread use of herbicides has raised considerable concern with regard to their harmful consequences on plant growth, crop yield and the soil ecological environment. It has been well documented that colonization of rhizobacteria in the plant root system has a positive effect on activation of plant defenses to protect the plant from damage. Using the platform of high-throughput analysis with tandem mass spectrometry and Illumina sequencing, we identified the specific activated rhizobacteria, the key growth stimulating substances and the metabolic pathways involved in seedling stage tolerance to mefenacet stress in rice. The relative abundance of beneficial rhizospheremicrobes such as Acidobacteria and Firmicutes increased with mefenacet treatment, indicating that the rhizosphere recruited some beneficial microbes to resist mefenacet stress. Mefenacet treatment induced alterations in several interlinked metabolic pathways, many of which were related to activation of defense response signaling, especially the indole-3-pyruvate pathway. Indole-3-acetaldehyde and indole-3ethanol from this pathway may act as flexible storage pools for indole-3-acetic acid (IAA). Our findings also suggest that a significant increase of IAA produced by the enrichment of beneficial rhizospheremicrobes, for example genus Bacillus, alleviated the dwarfing phenomenon observed in hydroponic medium following mefenacet exposure, which may be a key signaling molecule primarily for phytostimulation and phytotolerance in microbe-plant interactions.
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