Amino Acids From Root Exudates Induce Bacillus Spore Germination to Enhance Root Colonisation and Plant Growth Promotion.

Strains of Bacillus species, plant growth-promoting rhizobacteria, have been commercialised as biofertilisers; they are ideal for this because these species form spores that can be stored stably for a long time. However, for these spores to exert their full beneficial effects, they must germinate. The specific germination signals in the rhizosphere, particularly those from plant root exudates, remain largely unknown.

The effect of combination of root exudates substances on stimulation of Bacillus spores' germination.

Root exudates play a crucial role in the rhizosphere by influencing the growth and activity of plant growth-promoting rhizobacteria (PGPR), such as Bacillus velezensis. Previous studies have shown that most Bacillus spores can germinate in the rhizosphere while remain dormant in the soil. Understanding the relationship between specific components of root exudates and spore germination could provide valuable insights into how plants alter the ratio of spores in the rhizosphere through root exudates.

Bridging the Gap: Biofilm-mediated establishment of on mycelia.

Bacterial-fungal interactions (BFIs) are important in ecosystem dynamics, especially within the soil rhizosphere. The bacterium SQR9 and the fungus NJAU 4742 have gathered considerable attention due to their roles in promoting plant growth and protecting their host against pathogens. In this study, we utilized these two model microorganisms to investigate BFIs.

Bacillus velezensis stimulates resident rhizosphere Pseudomonas stutzeri for plant health through metabolic interactions.

Trophic interactions play a central role in driving microbial community assembly and function. In gut or soil ecosystems, successful inoculants are always facilitated by efficient colonization; however, the metabolite exchanges between inoculants and resident bacteria are rarely studied, particularly in the rhizosphere. Here, we used bioinformatic, genetic, transcriptomic, and metabonomic analyses to uncover syntrophic cooperation between inoculant (Bacillus velezensis SQR9) and plant-beneficial indigenous Pseudomonas stutzeri in the cucumber rhizosphere.

Isolation and characterization of antagonistic Paenibacillus polymyxa HX-140 and its biocontrol potential against Fusarium wilt of cucumber seedlings.

Objective: The aim of this study is to evaluate the efficacy of the strain Paenibacillus polymyxa HX-140, isolated from the rhizosphere soil of rape, to control Fusarium wilt of cucumber seedlings caused by Fusarium oxysporum f. sp. cucumerinum.