Mitigating the Chromium Toxicity in Zea mays L. using Cr-resistant PGPR
Abstract
Heavy metal contamination, particularly with chromium (Cr) poses a serious threat to sustainable agriculture by impairing plant growth and productivity.The current study investigates the potential of plant growth promoting rhizobacteria (PGPR) to alleviate chromium induced stress using Zea mays under laboratory conditions.Seeds were inoculated using Pseudomonas spp.(AH3 and AH2) and Pseudomonas qingdaonensis (AR5) and were sown in pots under chromium stress.Morphological parameters like shoot and root length, number of leaves, fresh weight, as well as biochemical parameters like chlorophyll and protein content, were recorded under stressed and nonstressed plants.The results demonstrated that chromium toxicity significantly reduced plant growth.However, bacterial inoculation, under stressed conditions, enhanced plant growth as well as biochemical parameters.Hence, PGPR can be effectively employed as a sustainable bio-remediation strategy to restore heavy metalcontaminated soils and enhance crop productivity under tress conditions.