Isolation, Identification and Evaluation of the Plant Growth Promoting Activities of Endophytic Stenotrophomonas maltophilia to Stimulate Growth of Clover Plants under Salt Stress

Two endophytic bacterial isolates were obtained from root nodules of clover plants grown in salt affected clay soil Egypt. The closely linked to Stenotrophomonas maltophilia strains IPR-Pv696 and 262XG2 based on the sequencing phylogenetic analysis 16S rRNA genes, deposited GenBank with accession numbers OM980221.1 (AM1) OM980223.1 (AM2) respectively. evaluated for their potential promote plant growth. results revealed that two S. (IPR-Pv696 262XG2) respectively exhibited production indole-3- acetic acid (30.26 & 31.15 µg/ml), exopolysaccharides (13.57 13.68 g/l), nitrogen fixation activity they solubilize phosphate (278 208 mg/l) potassium (33.5 32.9 µg/ml). In a field trial, these increased growth, chlorophyll, carbohydrates content nutrients uptake while lowering proline levels. Hence this highlights its application be exploited as biofertilizer by leading sustainable agriculture. This could promising inoculant many other crops.