Plant Species, Host Age and Host Genotype Effects on Meloidogyne incognita Biocontrol by Pseudomonas fluorescens Strain CHA0 and its Genetically‐Modified Derivatives

• DOI: 10.1046/j.1439-0434.2003.00716.x
• Publication Date: 2010-10-20T15:26:38Z
• Authors: I. A. Siddiqui; S. S. Shaukat
• Keywords: Pseudomonas fluorescens; Root-knot nematode

Abstract Pseudomonas fluorescens strain CHA0 and its antibiotic overproducing derivative CHA0/pME3424 repeatedly reduced Meloidogyne incognita galling on tomato, brinjal, mungbean soya bean roots but not in chilli. An antibiotic‐deficient derivative, CHA89, did reduce nematode invasion any of the plant species tested. When were compared, bacterial inoculants afforded better protection to against root‐knot nematodes than brinjal Antibiotic markedly fresh shoot weights chilli while CHA89 enhanced mungbean. While strains had no significant impact root species, consistently In none an influence protein contents leaves. Regardless three differ their rhizosphere colonization pattern. However, was highest lowest rhizosphere. A slight host genotype effect biocontrol performance also detected at cultivar level. five cultivars bacteria exhibited best suppression cv. Ajmeri. substantially Centuray 84 NARC‐I Ajmeri, William‐82 NARC‐II. Wild type cultivars. Strain Century 84, NARC‐II increased weights. Bacterial variety Plant age a nematodes. The all more prominent during early growth stage (7 days after inoculation). strong negative correlation between observed.