b-Amino Butyric Acid – Resistance Inducing Agent in Pearl Millet

Shailasree, S. and Melvin, P. (2015) b-Amino Butyric Acid – Resistance Inducing Agent in Pearl Millet. Journal of Plant Biochemistry & Physiology, 3 (2). pp. 1-3.

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Abstract

β-amino butyric acid (BABA), applied as inducer of resistance to the seeds of susceptible cultivar of pearl millet [Pennisetum glaucum (L) R Br] against downy mildew [Sclerospora graminicola (Sacc) Schroet]. Infection offered protection to the host operative through vegetative and reproductive growth. Biochemical studies identified a close association between BABA-treatment and accumulation of defence-related proteins like phenylalanine ammonia lyase, peroxidise and β-1,3-glucanase. Studies on phenotypic host defence identified modifications in host cell wall leading to papillae formation with hydroxyproline-rich glycoproteins (HRGPs) as its major constituent. The HRGPs were identified as extensions by use of MAC 265 monoclonal antibodies. PgMPK4 (mitogen-activated protein kinase) was identified as the crucial signal transduction module signalling of pathogen cues. This increased accumulation of PgMPK4 mRNA and kinase activity in BABA-treated samples and further kinase inhibitor treatments providing critical evidence of PgMPK4 involvement in the JA- and SA mediated expression of defence genes, it may be assumed that BABA-induced resistance could be a JA/SA mediated phenomenon.

Item Type: Article
Uncontrolled Keywords: BABA; Inducer of resistance; Pearl millet; Defence related enzymes; HRGPs; PgMPK
Author Affiliation: Institution of Excellence, Vijnana Bhavana, University of Mysore, Mysore-570 006, Karnataka, India
Subjects: Plant Protection
Divisions: Millet
Depositing User: Mr B Krishnamurthy
Date Deposited: 26 Nov 2015 08:12
Last Modified: 26 Nov 2015 08:12
Official URL: http://dx.doi.org/10.4172/2329-9029.1000144
URI: http://eprints.icrisat.ac.in/id/eprint/13990

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