A group from School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China, etc. has reported that n-hexadecanoic acid secreted by tomato roots most strongly promotes biofilm formation of Pseudomonas stutzeri.
Plant growth-promoting rhizobacteria (PGPR) have been widely used in agricultural applications because of their safety, biological control of diseases and insect pests, and ability to induce c abiotic tolerance. It is know that the colonization, chemotaxis, and biofilm formation by PGPR are induced by the root exudates and certain metabolites.
In this study, it was shown that inoculation with a certain concentration of Pseudomonas stutzeri NRCB010 significantly promoted tomato growth and induced significant changes in tomato root exudates. Among those root exudates, n-hexadecanoic acid induced the most remarkable growth, chemotactic response, biofilm formation, and rhizosphere colonization of Pseudomonas stutzeri.