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Cold tolerance and plant growth promotion potential of Serratia marcescens strain SRM (MTCC 8708) isolated from flowers of summer squash (Cucurbita pepo)
- Selvakumar, G., Mohan, M., Kundu, S., Gupta, A.D., Joshi, P., Nazim, S., Gupta, H.S.
- Letters in applied microbiology 2008 v.46 no.2 pp. 171-175
- Cucurbita pepo, Serratia marcescens, Triticum aestivum, biomass, cold, cold tolerance, flowers, growth promotion, hydrogen cyanide, indole acetic acid, nutrient uptake, seedling growth, seedlings, siderophores, temperature, wheat, yellow vine disease, zucchini
- To determine the cold tolerance and plant growth promotion potential of Serratia marcescens strain SRM (MTCC 8708). Serratia marcescens strain SRM was isolated from the flowers of summer squash plants, showing no apparent symptoms of yellow vine disease. It was evaluated for growth and plant growth promotion attributes at 15 and 4°C. At 15°C, the isolate was able to solubilize 76·6 μg ml⁻¹ of P and produce Indole Acetic Acid, IAA (11·1 μg ml⁻¹). HCN and siderophore production were also detected at 15°C. The isolate retained all the plant growth promotion traits at 4°C. Seed bacterization with the isolate significantly enhanced plant biomass and nutrient uptake of wheat seedlings grown in cold temperatures. Serratia marcescens strain SRM is a promising cold-tolerant isolate that can significantly influence wheat seedling growth at cold temperatures. This strain can be employed as a bioinoculant in cold temperature conditions.