1-Aminocyclopropane-1-Carboxylate: A Novel and Strong Chemoattractant for the Plant Beneficial Rhizobacterium Pseudomonas putida UW4

• DOI: 10.1094/mpmi-11-18-0317-r
• Publication Date: 2019-01-14T19:23:32Z
• Authors: Tao Li; Jun Zhang; Chaohui Shen; Huiru Li; Liyou Qiu
• Keywords: Pseudomonas putida; Agaricus bisporus

Plant growth–promoting rhizobacteria (PGPR) and fungi-bacterial biofilms are both important biofertilizer inoculants for sustainable agriculture. However, the strongest chemoattractant bacteria to colonize rhizosphere mycelia is not clear. Coincidentally, almost all PGPRs possess 1-aminocyclopropane-1-carboxylate (ACC) deaminase (AcdS) can utilize ACC as sole nitrogen source. Here, we found that was a novel, metabolic dependent methyl-accepting chemoreceptor–involved Pseudomonas putida UW4. The chemotactic response of UW4 significantly greater than amino acids organic identified in plant root fungal hyphal exudates. colonization counts acdS or cheR deletion mutants wheat on Agaricus bisporus were reduced one magnitude compared with those A. antisense oxidase high production increased bisporus, followed by complementary strain ethylene chemoreceptor gene–deletion mutant. strains + low decreased wild type. These results suggested should be PGPR contain AcdS.