Abstract

Mulberry (Morus indica L.), is an astounding multipurpose woody, deciduous crop grown all over the world. Due to pathogens that cause root rot diseases in mulberry have a major impact on intensive crop cultivation and commercial cocoon production. Notably, it has been found that these pathogens affect healthy mulberry plantations regardless of their age, variety that grown in wide-ranging soil and agro-climatic conditions. To manage the pathogens, two potent melanogenic actinobacteria Actinoalloteichus cyanogriseus isolated from mulberry rhizosphere with few extremophilic characteristics were identified in the previous study. Their antagonism towards these pathogens exhibited through a variety of phenomena. The chemical fingerprints of bioactive isolates revealed the presence of more than 30 compounds for each. Advantageously, smaller molecules were found to be the majority of them. Important bioactive inhibitory compounds including, 2,4-DTBP, binapacryl, decanoic acid groups, 1-hydroxy-6-methylphenazine, etc. were identified through GC-MS. In addition to evidence of antifungal metabolites there were also found traces of anti-bacterial, allelopathic compounds with other antioxidants and flavonoid compounds. The current work thus sheds light on the antifungal potency of melanogenic isolates, which has been unexplored/ poorly analyzed.

Saratha, M., Angappan, K., 2024. Arms race of melanogenic actinobacteria Actinoalloteichus cyanogriseus against mulberry root rot pathogens. Research Biotica 6(2), 38-45. DOI: 10.54083/ResBio/6.2.2024/38-45.