Pseudomonas fluorescens mediated systemic resistance in black pepper (Piper nigrum L.) is driven through an elevated synthesis of defence enzymes

Paul, Diby and Sarma, Y.R. (2005) Pseudomonas fluorescens mediated systemic resistance in black pepper (Piper nigrum L.) is driven through an elevated synthesis of defence enzymes. Archives of Phytopanthology and Plant Protection, 38 (2). pp. 139-149. ISSN 0323-5408

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Abstract

Efficient strains of Pseudomonas fluorescens identified were evaluated for their efficacy in inducing defence enzymes in black pepper. Increased levels of Peroxidase (PO), Catalase, Phenylalanine Ammonia Lyase (PAL) and Poly Phenol Oxidase (PPO) were induced in leaves apart from the roots of treated plants indicating the systemic protection offered to black pepper by the strains exploring the prevention of even foliar infection by the pathogen, Phytophthora capsici. The increase in production of defence enzymes upon challenge were higher in the non-bacterized plants compared to the bacterized plants, indicating the lesser requirement of defence enzymes in the bacterized plants upon encounter with the pathogen. Also found was a relatively higher quantity of lignification (30–100%) over control) in the bacterized roots compared to the plants untreated which resulted in significant root rot suppression.

EPrint Type:Article
Additional Information:Pre-Print draft provided here.
Uncontrolled Keywords:Pseudomonas fluorescens, Phytophthora capsici, PAL, PO, PPO, catalase
Subjects:Biochemical Phenomena, Metabolism, and Nutrition > Biochemical Phenomena
Enzymes and Coenzymes > Enzymes
Bacteria > Gram-Negative Bacteria
ID Code:130
Deposited By:Dr Diby Paul
Deposited On:29 June 2005

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