Author(s):

KG Anitha

Abstract: The crops exposed to salinity face reduced crop growth and productivity due to intervention in the physiological activities like ion toxicity, nutrient deficiency and oxidative stress. Therefore, it is critical that the plant counteract the production of reactive oxygen species with mechanisms for neutralizing them. Antioxidant enzymes are essential components of the plant's antioxidant defence system. The antioxidant enzyme activity and role in scavenging oxidative stress of certain endophytic microbes may be useful as growth promoting microbial agent for enhancing the vigour and tolerance of agricultural and horticultural crops under salt stress. In the present study two experiments have been conducted to standardise the method of application (Foliar spray, Soil Application, Foliar spray +Soil application) and to find the impact of microbial consortium containing antioxidant producing bacterial endophytes on growth and antioxidant activity of bhendi (CoBh H1) under in vitro condition by implementing four treatments as Control, Biofertilizer + Biocontrol agents, AOE Consortium, Biofertilizer + Biocontrol agents + AOE Consortium. Among the various methods of application tried foliar spray performed better by recording higher Plant height (19.82 cm) and stem girth (1.8cm) on 60^th DAS and leaf Area of (32.18, 101.53, 77.37 ) on 30,45 and 60 DAS. In the second experiment, plants treated with AOX consortium recorded higher plant height (19.2 cm), stem girth (1.9cm), average leaf number (10.3) and catalase (145 U mg protein^-1) & peroxidase activity (21.6 U mg protein^-1) on 60 DAS which were statistically on par with Biofertilizers + biocontrol agents imposed plants.

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