Effects of different plant root exudates and their organic acid components on chemotaxis, biofilm formation and colonization by beneficial rhizosphere-associated bacterial strains

The components of rice and watermelon root exudates and their effects on pathogenic fungus and watermelon defense

“…22,24 Microbial communities are influenced by root exudates, which alter the nutrient status of the soil, adhere to microbes, promote biofilm formation, or serve as chemo-stimulants that enhance microbial growth. 3,[25][26][27] Bacterial communities in the rhizosphere were altered in Arabidopsis thaliana jasmonate pathway mutants (myc2 and med25), due to changes in the composition of root exudates. 26 The components present in root exudates depend on the plant species and cultivar, and on environmental conditions.…”

Swarming motility plays the major role in migration during tomato root colonization by Bacillus subtilis SWR01

“…The importance of chemotaxis in colonization was also reported for B. subtilis FB17 on Arabidopsis roots (Rudrappa et al, 2008) and B. subtilis N11 on cucumber and banana roots (Zhang et al, 2014). However, measuring the colonization response chemotaxis defective of the mutant DcheA in B. subtilis is not possible because cheA mutant is swarming defective besides loss of chemotaxis and the colonization reduced by swarming defective obscures that of the chemotaxis (Kearns and Losick, 2003;Kojima et al, 2007).…”

Factors other than root secreted malic acid that contributes towardBacillus subtilisFB17 colonization onArabidopsisroots

“…10,20 Plant root exudate and its composition is known to play an important role in plant-microbe interaction in the rhizosphere. 8,17,18,20 To investigate the cause of the profound colonization pattern of the FB17, the mutants of up-/ downregulated genes were co-inoculated with foliar infiltration of PstDC3000 and root inoculated with FB17. Post 72 h of treatment FB17 colonization was quantified.…”