Influence of metham sodium on suppression of collar rot disease of peanut, in vitro antibiosis, siderophore production and root colonization by a fluorescent pseudomonad strain FPO4.
A hydroxamate type siderophore producing fluorescent Pseudomonas strain, isolated from the rhizoplane of paddy root showing plant growth promoting activity, exhibited a decreased in vitro antibiosis, production of siderophore and suppression of collar rot in presence of metham sodium. Use of herbicide had a detrimental effect on the plant growth promoting activity of this organism. The multiple drug resistant mutant strain derived from this rhizobacteria colonized the roots, but the herbicide application had a negative effect on their population. HPLC analysis of the siderophore showed five peaks of which the peak number three confirmed the antifungal activity.
Dileep
C
C
Crop Improvement Division, Central Plantation Crops Research Institute (ICAR), Kayamkulam 690 533, India.
Kumar
B S
BS
D000900:Anti-Bacterial Agents / Q000096:biosynthesis; D000935:Antifungal Agents / Q000494:pharmacology; D010367:Arachis / Q000187:drug effects* / Q000382:microbiology; D001234:Aspergillus niger / Q000187:drug effects; D010935:Plant Diseases / Q000382:microbiology; D018517:Plant Roots / Q000382:microbiology; D011549:Pseudomonas / Q000254:growth & development; D017262:Siderophores / Q000096:biosynthesis; D013859:Thiocarbamates / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D017262:Siderophores; D013859:Thiocarbamates; C008435:methyldithiocarbamate