Abstract :
AINIHAYATI Abdul Rahim1,a,* and NIK FATIN QHARANIE Nik Mohd Kamaruzzaman1,b
1Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan, 17600 Jeli Kelantan
aainihayati@umk.edumy, bfatinqharanie@yahoo.com
Abstract. Plant growth-promoting rhizobacteria (PGPR) are well-documented for their ability to enhance crop productivity through mechanisms such as nutrient solubilization, nitrogen fixation, and phytohormone production. Additionally, PGPR contributes to improved seedling vigor and stress tolerance, making them vital for sustainable agricultural practices. In this study, rhizobacteria were selectively isolated using specific media designed to target nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and methylotrophic bacteria. The isolation process successfully yielded targeted strains with the desired functional capabilities. The isolates were subjected to comprehensive screening for plant growth-promoting activities, including phosphate solubilization assays, phytase activity evaluation, phytohormone production, and growth capacity in nitrogen-free media. All isolates demonstrated promising capabilities across these parameters, highlighting their potential to enhance nutrient availability and promote plant growth. To validate their efficacy, seed vigor index (SVI) tests were conducted, which confirmed the positive influence of these rhizobacterial isolates on plant development. These findings suggest that the selected rhizobacteria possess significant potential as biofertilizers, offering an eco-friendly solution to improve crop productivity and promote sustainable agriculture.
Keywords: Rhizobacteria, plant growth-promoting, phosphate solubilizing bacteria, nitrogen-fixing bacteria, methylotrophic bacteria, biofertilizer |
