PGPB Improve Photosynthetic Activity and Tolerance to Oxidative Stress in Brassica napus Grown on Salinized Soils

Soil salinization, one of the most common causes soil degradation, negatively affects plant growth, reproduction, and yield in plants. Saline conditions elicit some physiological changes to cope with imposed osmotic oxidative stresses. Inoculation plants bacterial species that stimulate their i.e., growth-promoting bacteria (PGPB), may help counteract saline stress, thus improving plant’s fitness. This manuscript reports effects inoculation a salt-sensitive cultivar Brassica napus (canola) five different PGPB (separately), Azospirillum brasilense, Arthrobacter globiformis, Burkholderia ambifaria, Herbaspirillum seropedicae, Pseudomonas sp. on salt stress responses. The seeds were sown (8 dS/m) inoculated suspensions. Seedlings grown phenological stage rosetta, when morphological features determined. In presence above-mentioned PGPB, exposed canola grew better than non-inoculated controls. water loss was reduced under conditions, due low level membrane damage enhanced synthesis osmolyte proline, latter depending strain inoculated. reduction also increased antioxidant activity (i.e., higher amount phenolic compounds, superoxide dismutase, ascorbate peroxidase activities) salt-stressed napus. Furthermore, did not show detrimental photosynthetic apparatus, efficiency PSII energy dissipation by heat for photosynthesis detected. improvement response provided paves way further use as inoculants soils.