Systemic Resistance in Tomato against Meloidogyne incognita Induced by Plant Growth Promoting Rhizobacterium, Pseudomonas fluorescens 255
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Author:K. Sankari Meena, E.I. Jonathan and P.G. Kavitha
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:98, Issue:jul-sep
DOI: https://doi.org/10.29321/MAJ.10.100290
Abstract
Resistance-related enzymatic activities due to selected strains of Pseudomonas fluorescens
were assayed by split root bioassay in tomato under glass house conditions. Application of
P. fluorescens as seedling root dip increased the level of peroxidase (PO), polyphenol oxidase
(PPO) and phenylalanine ammonia lyase (PAL) in tomato roots indicated the systemic
resistance induced by the bacterial formulations against root knot nematode, Meloidogyne
incognita. Among the four P.fluorescens isolates tested alone and in consortium with Bacillus
subtilis, Bbv 57, consortial application of P. fluorescens, Pf 128 with B. subtilis, Bbv 57 recorded
the highest enzymatic activity in tomato roots compared to other strains either alone or in
consortium. Results indicated that P. fluorescens was capable of inducing systemic resistance
against M. incognita in tomato by the accumulation of the defense enzymes like PO, PPO and
PAL.
Key words : Tomato, Plant Growth Promoting Rhizobacterium, Meloidogyne incognita, systemic resistance