Southern blight disease of tomato control by 1-aminocyclopropane-1-carboxylate (ACC) deaminase producing Paenibacillus lentimorbus B-30488

Plant Signaling & Behavior
Ritu DixitChandra Shekhar Nautiyal

Abstract

Tomato cultivation is highly susceptible for soil born diseases and among them southern blight disease caused by Scelerotium rolfsii is very common. For its management use of chemical fungicides is not very successful as their spores are able to survive for many years in the soil. As an alternative eco-friendly approach to control the disease antagonistic microbes are being characterized.Among them plant growth promoting rhizobacteria Paenibacillus lentimorbus B-30488 (B-30488) with antagonistic properties, multiple PGP attributes stress tolerance and ACC deaminase enzyme activity is characterized to decipher its mode of action against S. rolfsii under in vitro and in vivo conditions. In vitro results obtained from this study clearly demonstrate that B-30488 has ability to show antagonistic properties under different abiotic stresses against S. rolfsii. Similar results were also obtained from in vivo experiments where B-30488 inoculation has efficiently controlled the disease caused by S. rolfsii and improve the plant growth. Deleterious enhanced ethylene level in S. rolfsii infected plants was also ameliorated by inoculation of ACC deaminase producing B-30488. The ACC accumulation, ACO and ACS activities were also modulated in...Continue Reading

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