拟南芥中atroviride木霉定殖诱导的系统性抗性主要独立于几丁质介导的信号通路。

IF 2.1 4区 环境科学与生态学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Microbes and Environments Pub Date : 2024-01-01 DOI:10.1264/jsme2.ME24038
Ayae Sakai, Hisako Yamagata, Keigo Naito, Mai Yoshioka, Takaya Tominaga, Shinsuke Ifuku, Hironori Kaminaka
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引用次数: 0

摘要

有益的根内生真菌在定植的寄主植物中诱导系统反应,促进生长和诱导系统抗性(ISR)。土壤施几丁质,真菌细胞壁的主要成分,也系统地诱导抗病。因此,几丁质识别及其下游信号通路介导了有益真菌定殖根部引发的ISR。本研究比较了拟南芥有益根内生真菌木霉和几丁质诱导的系统性抗病和转录应答。三种有益真菌(Trichoderma atroviride、Serendipita indica和S. vermifera)在根定植下对植物生长有显著促进作用。只有T. atroviride和S. indica触发了对坏死性真菌病原菌甘蓝交替菌的ISR。几丁质受体突变体受atroviride诱导的全身抗性受到损害,而土壤施几丁质引起的全身抗性则没有受到损害。转录组分析表明,几丁质调控的基因大部分与T. atroviride调控的基因共享;然而,后者中的许多都是具体的。这些基因共同富集的基因本体表明,接种atroviride和几丁质应用系统地控制着类似的转录反应,主要与细胞壁功能有关。因此,木霉可能主要独立于几丁质介导的信号通路触发ISR;然而,几丁质和木霉在地上可以系统性地诱导类似的细胞功能。
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Root Colonization by Trichoderma atroviride Triggers Induced Systemic Resistance Primarily Independent of the Chitin-mediated Signaling Pathway in Arabidopsis.

Beneficial root endophytic fungi induce systemic responses, growth promotion, and induced systemic resistance (ISR) in colonized host plants. The soil application of chitin, a main component of fungal cell walls, also systemically induces disease resistance. Therefore, chitin recognition and its downstream signaling pathway mediate ISR triggered by beneficial fungi colonizing the root. The present study compared systemic disease resistance and transcriptional responses induced by Trichoderma, a representative beneficial root endophytic fungus, and chitin in Arabidopsis. Significant plant growth promotion was observed under root colonization by the three beneficial fungi tested: Trichoderma atroviride, Serendipita indica, and S. vermifera. Only T. atroviride and S. indica triggered ISR against the necrotrophic fungal pathogen Alternaria brassicicola. Induced systemic resistance triggered by T. atroviride was compromised in the chitin-receptor mutant, whereas systemic resistance caused by the soil application of chitin was not. A transcriptome ana-lysis demonstrated that chitin-regulated genes were mostly shared with those regulated by T. atroviride; however, many of the latter were specific. The commonly enriched gene ontologies for these genes indicated that the T. atroviride inoculation and chitin application systemically controlled similar transcriptional responses, mainly associated with cell wall functions. Therefore, Trichoderma may trigger ISR primarily independent of the chitin-mediated signaling pathway; however, chitin and Trichoderma may systemically induce similar cellular functions aboveground.

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来源期刊
Microbes and Environments
Microbes and Environments 生物-生物工程与应用微生物
CiteScore
4.10
自引率
13.60%
发文量
66
审稿时长
3 months
期刊介绍: Microbial ecology in natural and engineered environments; Microbial degradation of xenobiotic compounds; Microbial processes in biogeochemical cycles; Microbial interactions and signaling with animals and plants; Interactions among microorganisms; Microorganisms related to public health; Phylogenetic and functional diversity of microbial communities; Genomics, metagenomics, and bioinformatics for microbiology; Application of microorganisms to agriculture, fishery, and industry; Molecular biology and biochemistry related to environmental microbiology; Methodology in general and environmental microbiology; Interdisciplinary research areas for microbial ecology (e.g., Astrobiology, and Origins of Life); Taxonomic description of novel microorganisms with ecological perspective; Physiology and metabolisms of microorganisms; Evolution of genes and microorganisms; Genome report of microorganisms with ecological perspective.
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