Microbe-Friendly Plants Enable Beneficial Interactions with Soil Rhizosphere Bacteria by Lowering Their Defense Responses

Alexander Arkhipov; Ziyu Shao; Sean R. Muirhead; Muchineripi S. Harry; Maria Batool; Hooman Mirzaee; Lilia C. Carvalhais; Peer M. Schenk

doi:10.3390/plants13213065

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Microbe-Friendly Plants Enable Beneficial Interactions with Soil Rhizosphere Bacteria by Lowering Their Defense Responses

Journal article

Open access

Peer reviewed

Microbe-Friendly Plants Enable Beneficial Interactions with Soil Rhizosphere Bacteria by Lowering Their Defense Responses

Alexander Arkhipov, Ziyu Shao, Sean R. Muirhead, Muchineripi S. Harry, Maria Batool, Hooman Mirzaee, Lilia C. Carvalhais and Peer M. Schenk

Plants, Vol.13(21), pp.1-24

2024

DOI: https://doi.org/10.3390/plants13213065

PMCID: PMC11548416

PMID: 39519980

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Abstract

beneficial microbe

biostimulant

microbial biofertilizer

PGPR

plant breeding

plant defense

plant growth-promoting rhizobacteria

plant-microbe interactions

rhizosphere bacteria

sustainable agriculture

The use of plant growth-promoting rhizobacteria presents a promising addition to conventional mineral fertilizer use and an alternative strategy for sustainable agricultural crop production. However, genotypic variations in the plant host may result in variability of the beneficial effects from these plant-microbe interactions. This study examined growth promotion effects of commercial vegetable crop cultivars of tomato, cucumber and broccoli following application with five rhizosphere bacteria. Biochemical assays revealed that the bacterial strains used possess several nutrient acquisition traits that benefit plants, including nitrogen fixation, phosphate solubilization, biofilm formation, and indole-3-acetic acid (IAA) production. However, different host cultivars displayed genotype-specific responses from the inoculations, resulting in significant (p < 0.05) plant growth promotion in some cultivars but insignificant (p > 0.05) or no growth promotion in others. Gene expression profiling in tomato cultivars revealed that these cultivar-specific phenotypes are reflected in differential expressions of defense and nutrient acquisition genes, suggesting that plants can be categorized into "microbe-friendly" cultivars (with little or no defense responses against beneficial microbes) and "microbe-hostile" cultivars (with strong defense responses). These results validate the notion that "microbe-friendly" (positive interaction with rhizosphere microbes) should be considered an important trait in breeding programs when developing new cultivars which could result in improved crop yields.

Details

Title: Microbe-Friendly Plants Enable Beneficial Interactions with Soil Rhizosphere Bacteria by Lowering Their Defense Responses
Authors: Alexander Arkhipov - The University of Queensland
Ziyu Shao - The University of Queensland
Sean R. Muirhead - The University of Queensland
Muchineripi S. Harry - The University of Queensland
Maria Batool - The University of Queensland
Hooman Mirzaee - The University of Queensland
Lilia C. Carvalhais - The University of Queensland
Peer M. Schenk (Corresponding Author) - University of the Sunshine Coast, Queensland, Centre for Bioinnovation
Publication details: Plants, Vol.13(21), pp.1-24
Publisher: MDPI AG
Date published: 2024
DOI: 10.3390/plants13213065
ISSN: 2223-7747
PMID: 39519980; PMC11548416
Copyright note: © 2024 by the authors. This article is an open access article distributed under the terms and conditions of the Creative CommonsAttribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Data Availability: The data presented in this study are available in this article.
Organisation Unit: Centre for Bioinnovation
Language: English
Record Identifier: 991088098702621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Plant Sciences

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