Vol. 11, Issue 12 (2022)

Author(s):
Jinnamu Aresh, Prodyut Kumar Paul, Mutum Preema Devi, Ashok Chaudhury and Surajit Khalko

Abstract:
Recent study investigated the biological depletion of ethylene for delay ripening by using microbial isolates i.e., Pseudomonas sp. The experiment was carried out in a factorial completely randomization design with nine treatments and four replications at the Laboratory of the Department of Pomology and Postharvest Technology, UBKV, Pundibari. The matured unripe banana was treated with different combinations of Pseudomonas sp. isolated from vermicompost (S₁), orchard (S₂) and forest soil (S₃) and carrier media i.e., Peat soil + cotton (T₁), cotton (T₂) and peat soil (T₃) are T₁S₁, T₂S₁, T₃S₁, T₁S₂, T₂S₂, T₃S₂, T₁S₃, T₂S₃ and T₃S₃. Fruits treated with microbial isolates of forest soil having carrier media peat soil (T₃S₃) showed less ethylene evolution rate as compared to orchard and vermicompost, followed by T₂S₃ in the storage condition. The highest ethylene evolution rate was perceived in control followed by T1S1. Microbial isolates from forest soil and having carrier media as a peat soil showed the best result among the different treatments combinations in removing ethylene from the surroundings as evidenced by a slow rate of increase in TSS, least ethylene concentration or higher ethylene depletion, less yellowing of the peel and higher phenol content in the fruit. Therefore, using Pseudomonas sp. in storage facilities can reduce the ethylene concentration and can be used as a postharvest treatment tool for delayed ripening.