Silicon and Plant Growth-Promoting Rhizobacteria Pseudomonas psychrotolerans CS51 Mitigates Salt Stress in Zea mays L.

Salinity is a significant abiotic stress for crop plants and threat to global food security. Optimizing yield without adversely affecting the ecosystem necessary sustainable agriculture. Silicon plant growth-promoting bacteria were reported mitigating several biotic in plants. In our study, we identified salt-tolerant rhizobacterium Pseudomonas psychrotolerans CS51. This species produces plant-growth-promoting biochemicals like indole-3-acetic acid (33 ± 1.8 ng/mL) gibberellic (GA3; 38 1.3 GA4; 23 1.2 Luria-Bertani(LB) media, LB media spiked with 200 mM NaCl (indole-3-acetic acid(IAA); 17.6 0.4 ng/mL, GA3; 21 0.9 19 1.0 ng/mL). current aimed investigate effect of isolate CS51 exogenous silicon (3 mM) on maize under salinity (200 mM). Our results showed that sole application CS51, Si, combined + Si significantly enhanced biomass chlorophyll content normal stress. Phytohormonal increased abscisic (ABA; three folds) jasmonic (JA; 49.20%). However, markedly reduced ABA (1.5 JA (14.89%). Besides, co-application strengthened antioxidant system, such as flavonoid (97%) polyphenol (19.64%), lowered proline (57.69%) Similarly, inoculation (solely or combined) uptake (4 Na+ (42.30%) conclusion, finding suggests combining can be used against may commercialized biofertilizer.