The Enzymatic Effect of Bio-agents on the Enzymatic Activity of Brinjal Infected with Root-knot Nematode (Meloidogyne javanica)
Kavita Choudhary *
Division of Nematology, Rajasthan Agriculture Research Institute, Durgapura, Jaipur, SKNAU, Jobner, Rajasthan – 303329, India.
S.P. Bishnoi
Division of Nematology, Rajasthan Agriculture Research Institute, Durgapura, Jaipur, SKNAU, Jobner, Rajasthan – 303329, India.
Raju Dhayal
Division of Nematology, Rajasthan Agriculture Research Institute, Durgapura, Jaipur, SKNAU, Jobner, Rajasthan – 303329, India.
B.S. Chandrawat
Department of Nematology, SKN College of Agriculture, SKNAU, Jobner – 303329, India.
G.K. Mittal
Department of Biochemistry, SKN College of Agriculture, SKNAU, Jobner – 303329, India.
*Author to whom correspondence should be addressed.
Abstract
Effect of culture filtrate (20 per cent concentrate) of bioagents (viz., Trichoderma viride, Trichoderma harzianum, Purpureocillium lilacinum, Pochonia chlamydosporia and Pseudomonas fluorescens) were tested on root-knot nematode (M. javanica). The accumulation of PPO and PAL and Phenol in brinjal roots infected with root-knot nematode (M. javanica) were also evaluated. The results showed that application of bio-agents increased the level of PPO, PAL and phenol in brinjal roots. Among all the treatments, application of T. viride @ 3 gm/kg soil is best treatment enhancing PPO, PAL and phenol activity, improve plant growth characters as well as in reducing nematode population over other treatment.
Keywords: Brinjal, root-knot nematode, Meloidogyne spp., enzyme activity, bio-agents