Two diversities meet in the rhizosphere: root specialized metabolites and microbiome

Wang, Xiaochen; Zhang, Jingying; Lu, Xinjun; Bai, Yang; Wang, Guodong

doi:10.1016/j.jgg.2023.10.004

Cited by 11 publications

(4 citation statements)

References 152 publications

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“…Organic acids are the most important components of root exudates of host plants, which will change with the changes in host plant varieties, physiological periods, and other factors ( Wang et al, 2023 ). Among them, amino acids are often used as the most common medium in the “cry for help” mechanism.…”

Section: Discussionmentioning

confidence: 99%

Recruitment of beneficial cucumber rhizosphere microbes mediated by amino acid secretion induced by biocontrol Bacillus subtilis isolate 1JN2

Yang,

Li,

Yan

et al. 2024

Front. Microbiol.

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IntroductionAt present, the use of beneficial microorganisms to control cucumber Fusarium wilt is a widely used method, and the rhizosphere microecological reset is one of the mechanisms involved. However, how biocontrol strains reshape cucumber rhizosphere microecology remains to be further studied.MethodsThe composition changes of cucumber root exudates induced by biocontrol strain 1JN2, the microbial ecology of cucumber rhizosphere and the colonization ability of biocontrol strain 1JN2 in cucumber rhizosphere were analyzed through UHPLC-MS/MS analysis, Illumina high-throughput sequencing and SEM, respectively.ResultsFirst, cucumber plants treated with biocontrol Bacillus 1JN2 reduced the disease severity of Fusarium wilt by 60%. Significant changes in cucumber root exudates were found after 1JN2 inoculation and the contents of four amino acids including glutamine, tryptophan, glycine and glutamic acid were significantly increased. Second, It was found that the bacterial diversity in the rhizosphere of cucumber was significantly increased in both the strain treatment group and the amino acid mixture treatment group, The number of Bacillus was the largest in all dominant populations, exceeded 20% in all treatment groups. The bacteria of Hydrogenispora and Vicinamibacteria were significantly increased after treatment.DiscussionOverall, the results demonstrated that amino acid substances in cucumber root exudates induced by biocontrol strain 1JN2 can shift the cucumber root microenvironment and prevent the occurrence of Fusarium wilt disease.

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Section: Discussionmentioning

confidence: 99%

Recruitment of beneficial cucumber rhizosphere microbes mediated by amino acid secretion induced by biocontrol Bacillus subtilis isolate 1JN2

Yang,

Li,

Yan

et al. 2024

Front. Microbiol.

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“…The addition of daidzein enriches the abundance of bacteria in Comamonadaceae, a predominant bacterial family in soybean roots. This suggests that manipulating isoflavonoid and other type of plant specialized metabolites could be a strategic approach to change the soil environment, potentially improving crop yields in nonleguminous plants through methods such as crop rotations in nitrogen-deficient conditions (Chen et al, 2019;Sugiyama, 2019;Wang et al, 2023). Understanding the regulation of isoflavonoids in the context of legume-rhizobial symbiosis allows for the development of crops with improved nitrogen fixation capabilities, which is essential for sustainable agriculture by reducing the need for synthetic fertilizers.…”

Section: Perspectivesmentioning

confidence: 99%

Isoflavonoid metabolism in leguminous plants: an update and perspectives

Yang,

Wang

2024

Front. Plant Sci.

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Isoflavonoids constitute a well-investigated category of phenylpropanoid-derived specialized metabolites primarily found in leguminous plants. They play a crucial role in legume development and interactions with the environment. Isoflavonoids usually function as phytoalexins, acting against pathogenic microbes in nature. Additionally, they serve as signaling molecules in rhizobial symbiosis. Notably, owing to their molecular structure resembling human estrogen, they are recognized as phytoestrogens, imparting positive effects on human health. This review comprehensively outlines recent advancements in research pertaining to isoflavonoid biosynthesis, transcriptional regulation, transport, and physiological functions, with a particular emphasis on soybean plants. Additionally, we pose several questions to encourage exploration into novel contributors to isoflavonoid metabolism and their potential roles in plant-microbe interactions.

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“…Among the root-derived metabolites, flavonoids, known for their role in signaling between legume roots and rhizobia, are also involved in the crosstalk between roots of several plants and non-nodulating bacteria promoting the recruitment of plant-beneficial bacteria like Aeromonadaceae, which include strain that enhances plant resistance to dehydration in Arabidospsis, or the taxa Oxalobacteraceae, which promotes maize growth and nitrogen acquisition [21][22][23][24][25]. More recently, it has been shown how the root exudate taxifolin, a flavonoid molecule from potato and onion, alters the recruitment of the rhizosphere microbiome in the adjacent tomato plant by promoting plant-beneficial bacteria, such as Bacillus sp., leading to improved resistance to Verticillium wilt disease [26].…”

Section: Introductionmentioning

confidence: 99%

Changes in the Rhizosphere Biome Depending on the Variety of Wheat, Timing of Its Growing Season, and Agrochemical Components in the Soils of Italy

Bardelli,

Fornasier,

Novarina

et al. 2024

Agronomy

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The purpose of this research is to investigate the interactions among wheat varieties and microorganisms within rhizosphere and how conventional agriculture affects these dynamics during the growing season. Indeed, little is known about how commercial bread varieties modulate root exudates and how agrochemicals affect the microbiological processes. Therefore, this study investigated the changes in soil microbiological features such as enzyme activities (β-glucosidase, xylosidase, glucoronidase, chitinase, leucine-aminopeptidase, acid and alkaline phosphomonoesterases, inositol phosphatase, phosphodiesterase, pyrophosphatase–phosphodiesterase, arylsulphatase) and microbial biomass as a function of treatment (fungicides and plant growth regulator—PGR) and wheat varieties (Skyfall, SY Moisson, Aquilante, Bandera, Tintoretto, Antille, and Bologna) at the sowing, heading, and harvesting stage. A total of 168 samples (2 treatments × 7 varieties × 3 field replicates × 4 sub-samples taken in each plot) were collected in each period and analyzed. We found that soil microbial biomass was a sensible indicator in the fungicide/PGR application, with reduced values in treated plots at the heading. At this stage, the soil enzymatic activities were in general more expressed, confirming that the microbial processes are more proactive due to the growth of plants. Overall, the soil enzymatic activities responded differently according to the wheat varieties, highlighting specific capabilities to interact with microbes.

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Two diversities meet in the rhizosphere: root specialized metabolites and microbiome

Cited by 11 publications

References 152 publications

Recruitment of beneficial cucumber rhizosphere microbes mediated by amino acid secretion induced by biocontrol Bacillus subtilis isolate 1JN2

Recruitment of beneficial cucumber rhizosphere microbes mediated by amino acid secretion induced by biocontrol Bacillus subtilis isolate 1JN2

Isoflavonoid metabolism in leguminous plants: an update and perspectives

Changes in the Rhizosphere Biome Depending on the Variety of Wheat, Timing of Its Growing Season, and Agrochemical Components in the Soils of Italy

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