title: Plant growth promoting capability and genetic diversity of bacteria isolated from mud volcano and lime cave of Andaman and Nicobar Islands.
abstract: Twenty four bacterial strains from four different regions of mud volcano and lime cave were isolated to estimate their diversity, plant growth promoting and biocontrol activities to use them as inoculant strains in the fields. An excellent antagonistic effect against four plant pathogens and plant growth promoting properties such as IAA production, HCN production, phosphate solubilization, siderophore production, starch hydrolysis and hydrolytic enzymes syntheses were identified in OM5 (Pantoea agglomerans) and EM9 (Exiguobacterium sp.) of 24 studied isolates. Seeds (Chili and tomato) inoculation with plant growth promoting strains resulted in increased percentage of seedling emergence, root length and plant weight. Results indicated that co-inoculation gave a more pronounced effects on seedling emergence, secondary root numbers, primary root length and stem length, while inoculation by alone isolate showed a lower effect. Our results suggest that the mixed inocula of OM5 and EM9 strains as biofertilizers could significantly increase the production of food crops in Andaman archipelago by means of sustainable and organic agricultural system.
authors.affiliation: Division of Field Crops Central Agricultural Research Institute Andaman and Nicobar Islands India Division of Field Crops, Central Agricultural Research Institute, Andaman and Nicobar Islands, India.
authors.forename: Gopu
authors.initials: G
authors.lastname: Venkadesaperumal
authors.affiliation: Division of Field Crops Central Agricultural Research Institute Andaman and Nicobar Islands India Division of Field Crops, Central Agricultural Research Institute, Andaman and Nicobar Islands, India.
authors.forename: Natrajan
authors.initials: N
authors.lastname: Amaresan
authors.affiliation: Division of Field Crops Central Agricultural Research Institute Andaman and Nicobar Islands India Division of Field Crops, Central Agricultural Research Institute, Andaman and Nicobar Islands, India.
authors.forename: Krishna
authors.initials: K
authors.lastname: Kumar
mesh_terms: D056449:Bacillales / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D018533:Biomass; D002212:Capsicum / Q000382:microbiology* / Q000502:physiology; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D004783:Environmental Microbiology; D007194:India; D062312:Islands; D018551:Solanum lycopersicum / Q000382:microbiology* / Q000502:physiology; D008969:Molecular Sequence Data; D020636:Pantoea / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D063245:Plant Development; D010937:Plant Growth Regulators / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D036226:Seedlings / Q000254:growth & development; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D010937:Plant Growth Regulators; D012336:RNA, Ribosomal, 16S
keywords: amplified ribosomal DNA restriction analysis (ADRDA); lime cave; mud volcano; phytopathogens; plant growth promotion