Journal of Basic Microbiology, Год журнала: 2025, Номер unknown
Опубликована: Май 30, 2025
ABSTRACT Drought‐tolerant multifunctional soil bacteria can increase drought tolerance mechanisms in plants. Here, rhizobacteria CRB‐4 and SPGPR‐11 were isolated their single co‐inoculation effect was evaluated drought‐stressed tomato Isolates selected based on preliminary polyethylene glycol (PEG) screening, plant growth‐promoting properties. Increasing water stress adversely affected growth physiological attributes of plant. However, (PGPB), particularly combined inoculation, alleviated stress. For instance, CRB‐4, significantly increased root biomass (33.3, 37.5% 45.4%), total chlorophyll (17.5, 15.6% 19.2%) carotenoid content (20, 30.4% 48.3%) 3%‐PEG‐stressed tomatoes. Similarly, 3%‐PEG‐treated plants with PGP isolates resulted a significant Fv/Fm (50%), Fv'/Fm' (29.4%), PS‐II (44.4%), Pq (40%), NPQ effective electron transfer rate (37.5%). Furthermore, under 5%‐PEG stress, SPGPR‐11, enhanced resilience by improving leaf gas exchange attributes. Combined inoculation gs (19%), C i (31.2%), transpiration (41%), vapor deficit (38.7%), iWUE (33.7%), photosynthetic (33.3%) 5%‐PEG‐stressed Among the treatments, co‐inoculations antioxidant defense responses Concurrently, qRT‐PCR analysis revealed upregulation ROS scavenging genes, SOD , CAT APX GR POD 6.53, 14.08, 11.72, 10.12, 5.95‐fold, respectively, co‐inoculated bacterial strains. This study concludes that alone or combination, offer an effective, eco‐friendly solution for
Язык: Английский