Alleviating Soil Acidification Could Increase Disease Suppression of Bacterial Wilt by Recruiting Potentially Beneficial Rhizobacteria

Abstract

The rhizosphere microbiota and soil acidification have been shown to have impacts on bacterial wilt. However, the influence of different acidification levels on the rhizosphere communities and bacterial wilt has not been fully studied.

Effects of Salinity on Assembly Characteristics and Function of Microbial Communities in the Phyllosphere and Rhizosphere of Salt-Tolerant Avicennia marina Mangrove Species

“…Their coculture with salt-stressed rice could effectively alleviate salt stress and promote the growth of rice. Bacillus is a relatively common plant growth-promoting rhizobacterium (PGPR) ( 42 , 43 ), and Kushneria is also a growth-promoting bacterium ( 44 ). Interestingly, we found that Bacillus was the dominant species only in the rhizosphere environment and hardly existed in the phyllosphere, while Kushneria was the dominant species only in the phyllosphere (see Fig.…”

Cooperative Action of Fulvic Acid and Bacillus paralicheniformis Ferment in Regulating Soil Microbiota and Improving Soil Fertility and Plant Resistance to Bacterial Wilt Disease

“…The keystone microorganism OTU74 belonging to Acidobacteriota was positively correlated to disease severity index, and acidophilic Acidobacteria might easily live and grow in the acidic soil. Zhang et al ( 46 ) reported that bacterial wilt was accompanied by soil acidification, and the abundance of R. solanacearum increased when the pH of soil reduced. It was speculated that Acidobacteria might act as a helper of pathogen R. solanacearum .…”

Foliar Pathogen Infection Manipulates Soil Health through Root Exudate-Modified Rhizosphere Microbiome

“…Plant growth can lead to the accumulation of soilborne pathogens in rhizosphere soil, thus building negative feedback loops between the soil and plants. When challenged by pathogen infection, plants can recruit beneficial microbes to help themselves ( 20 – 27 ). In this study, we found that belowground plant parts modified the rhizosphere soil microbial community and function by changing plant metabolism and secretion when aboveground leaves were infected by pathogens, eventually changing the plant-soil feedback from negative to positive.…”

“…Apart from internal immunological strategies that involve physiological and genetic modifications at the cellular level, plants could employ external strategies that rely on the recruitment of beneficial organisms ( 19 ). A series of studies demonstrated that plants under the stress of long-term soilborne pathogen infection could enrich antagonistic microflora to form disease-suppressive soil to reduce the severity of soilborne disease ( 20 – 23 ). When Arabidopsis thaliana was challenged with foliar pathogens (such as Pseudomonas syringae pv.…”