Acinetobacter sp. SG-5 inoculation alleviates cadmium toxicity in differentially Cd tolerant maize cultivars as deciphered by improved physio-biochemical attributes, antioxidants and nutrient physiology.

摘要: Abstract Cadmium is a phytotoxic metal which threatens the global food safety owing to its higher retention rates and non-biodegradable nature. Optimal study of microbe-assisted bioremediation potential way minimize adversities Cd on plants. Current was aimed isolate, identify characterize tolerant PGPBs from industrially contaminated soil evaluate plant-microbe synergy for growth augmentation remediation. The Acinetobacter sp. SG-5, identified through 16S rRNA gene sequence analysis, able tolerate 1000 mg/l applied stress ability in vitro indole-3-acetic acid production, phosphate solubilization, as well 1-aminocyclopropane-1-carboxylic deaminase activity. A Petri plate experiment designed investigate impact SG-5 toxicity (0, 6, 12, 18, 24, 30 μM) maize cultivars (3062-Cd tolerant, 31P41–Cd susceptible). Results revealed that non-inoculated plants were drastically affected with treatments growth, antioxidants mineral ions acquisition predominantly susceptible cultivar (31P41). PGPB inoculation positively influenced by enhanced anti-oxidative coupled optimum level nutrients (K, Ca, Mg, Zn). Analysis morpho-physio-biochemical traits after application substantial tolerance acquired cv. 31P41 than 3062 under regimes. Research outcomes may be important understanding responses likely provide efficient approaches reduce edible plant parts and/or bioremediation.