SOURCES OF RESISTANCE IN CHICKPEA (CICER ARIETINUM L.) LAND RACES AGAINST ASCOCHYTA RABIEI CAUSAL AGENT OF ASCOCHYTA BLIGHT DISEASE

摘要

The mycorrhizosphere is the region around a mycorrhizal fungus in which nutrients released from the hyphae increasesmicrobial population and its activities. In this study five mycorrhizospheric fluorescent Pseudomonas (MRFP) wereevaluated for biocontrol potential under field condition using mungbean (Vigna radiata) as test plant. MRFP-249significantly reduced Fusarium solani, Rhizoctonia solani and Macrophomina phaseolina. Whereas MRFP246 and MRFP247were also found effective against M. phaseolina. Mycorrhizospheric fluorescent Pseudomonas were also found effectiveagainst root knot nematode by reducing the galls on roots and nematode’s penetration in roots. Highest fresh shoot weightand plant height was produced by MRFP-248. Plants grown in soil treated with Pseudomonas showed higher number ofVAM spores around the mungbean roots than untreated control plants. The mycorrhizal symbiosis should not be consideredmerely as bipartite, plant-fungus interaction, but should instead include the associated microorganisms, particularlyfluorescent Pseudomonas.