CHARACTERIZATION OF PLANT GROWTH-PROMOTING MECHANISMS OF RHIZOBACTERIA FROM THE RHIZOSPHERE OF......

Tafilalet is one of Morocco's greatest oases, although it is endangered by climatic and environmental stressors such as drought, soil degradation, and plant diseases, particularly Fusarium wilt of date palm, which is caused by Fusarium oxysporum f.sp albedinis (Foa). The lack of organic matter, nutrient concentrations, and biological activity in the soil has resulted in a significant reduction in date palm growth. Excessive use of chemical fertilisers, which are detrimental to human health and the environment, is frequently used to boost date palm productivity. The goal of this study was to find plant growth-promoting rhizobacteria (PGPRs) that might also operate as biocontrol agents against Foa. In Tafilalet oases, Rhizobacteria associated with date palm and spontaneous plants were identified and functionally described. Several plant growth-promoting and biocontrol features, such as nutrient solubilization and the generation of secondary metabolites and enzymes, were examined. The results revealed that 97% of strains were successful in N-fixation, 36% in ammonia generation, and 90% in P-solubilization. At 30 and 32 strains, respectively, siderophores and Indol 3-acetic acid synthesis were found. Furthermore, 78 percent of the strains reduced Foa growth, with 42 percent entirely inhibiting mycelia growth on PDA media. Cellulase, protease, amylase, chitinase, and other secondary metabolites such as hydrogen cyanide were produced by several strains. Consortia of efficient PGPRs could be identified and employed as efficient microorganisms for future greenhouse and field research based on these findings.

Please see the link :- https://www.ikprress.org/index.php/JOGAE/article/view/7258