Effect of plant growth promoting rhizobacteria containing ACC-deaminase on maize (Zea mays L.) growth under axenic conditions and on nodulation in mung bean (Vigna radiata L.).

摘要: Aims:  This study was conducted to test the hypothesis that bacterial strains possessing 1-aminocyclopropane-1-carboxylic acid (ACC)-deaminase activity may also promote growth of inoculated plants and could increase nodulation in legumes upon co-inoculation with rhizobia. Methods Results:  Several rhizobacteria were isolated from maize rhizosphere through enrichment on ACC as a sole N source. Purified isolates screened for promotion under axenic conditions vitro ACC-deaminase activity. A significant positive correlation observed between cells root elongation. None produced auxins. Bradyrhizobiumjaponicum less amount auxins but did not carry Results pot experiment revealed Bradyrhizobium plant promoting (PGPR) enhanced mung bean compared inoculation alone. Conclusions:  It is highly expected containing hydrolysed endogenous into ammonia α-ketobutyrate instead ethylene. Consequently, shoot well promoted. Significance Impact Study:  The trait be employed an efficient tool screen effective PGPR, which successfully used biofertilizers legumes.