Plant Growth Promoting Rhizobacteria Effect on Antioxidant Status, Photosynthesis, Mineral Uptake and Growth of Lettuce under Soil Salinity
نویسندگان
چکیده
This study was carried out to investigate the effects of plant growth promoting rhizobacteria (PGPR) on the antioxidant status, photosynthesis, mineral content and growth of lettuce (Lactuca sativa L.) under different soil salinity conditions. Increasing salinity in the soil decreased plant growth, photosynthesis, stomatal conductance, chlorophyll content, and mineral uptake compared to soil without salinity. Inoculation with two PGPR strains, Serratia sp. and Rhizobium sp., into saline soils alleviated the salinity effects on the antioxidant enzymes ascorbate peroxidase (APX) and glutathione reductase (GR), along with those on photosynthesis, mineral content and growth. As a result, an increase in salinity in the soil caused a physiological response or disorder in lettuce plants. Treatment with PGPR strains could alleviate the effect of potentially toxic ions.
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