Impact of Plant Exudates on Soil Microbiomes

Maryani, Yekti; Rogomulyo, Rohlan

doi:10.1007/978-981-16-2922-8_11

Cited by 1 publication

(1 citation statement)

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“…This alteration impacts ISR and other stress resilience mechanisms (Gupta et al, 2021; Wen et al, 2021). Moreover, the decline in carbon conversion by photosynthesis can alter the chemical composition of the rhizoplane, which is inherently carbon‐rich, by limiting the exudation of sugars and amino acids (Jing et al, 2023; Maryani & Rogomulyo, 2021).…”

Section: Discussionmentioning

confidence: 99%

The underground world of plant disease: Rhizosphere dysbiosis reduces above‐ground plant resistance to bacterial leaf spot and alters plant transcriptome

Ketehouli,

Pasche,

Buttrós

et al. 2024

Environmental Microbiology

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Just as the human gut microbiome is colonized by a variety of microbes, so too is the rhizosphere of plants. An imbalance in this microbial community, known as dysbiosis, can have a negative impact on plant health. This study sought to explore the effect of rhizosphere dysbiosis on the health of tomato plants (Solanum lycopersicum L.), using them and the foliar bacterial spot pathogen Xanthomonas perforans as model organisms. The rhizospheres of 3‐week‐old tomato plants were treated with either streptomycin or water as a control, and then spray‐inoculated with X. perforans after 24 h. Half of the plants that were treated with both streptomycin and X. perforans received soil microbiome transplants from uninfected plant donors 48 h after the streptomycin was applied. The plants treated with streptomycin showed a 26% increase in disease severity compared to those that did not receive the antibiotic. However, the plants that received the soil microbiome transplant exhibited an intermediate level of disease severity. The antibiotic‐treated plants demonstrated a reduced abundance of rhizobacterial taxa such as Cyanobacteria from the genus Cylindrospermum. They also showed a down‐regulation of genes related to plant primary and secondary metabolism, and an up‐regulation of plant defence genes associated with induced systemic resistance. This study highlights the vital role that beneficial rhizosphere microbes play in disease resistance, even against foliar pathogens.

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Section: Discussionmentioning

confidence: 99%