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Title: Plant Defence Activators Inducing Systemic Resistance in <i>Zingiber officinale </i>Rose. against <i>Pythium aphanidermatum </i>(Edson) Fitz.
Authors: Karmakar, N C
Ghosh, Rajyasri
Purkayastha, R P
Keywords: Ginger
<i>Pythium aphanidermatum</i>
Rhizome rot
Defence activators
Systemic resistance
Issue Date: Oct-2003
Publisher: NISCAIR-CSIR, India
Abstract: Selected plant defence activators were employed to induce systemic resistance in a susceptible cultivar of ginger against <i>Pythium aphanidermatum </i>(Edson) Fitz., a severe rhizome rot causing pathogen. Among the 6 cultivars of ginger tested, Varada was most susceptible, followed by Suprabha and Maran. Prior to sowing, soaking of rhizome seeds for 1 hr in 5 m<i>M</i> salicylic acid (SA), DL-<img src='/image/spc_char/beta.gif' border=0>-aminobutyric acid (BABA) or 2,1,3-benzothiadiazole (BTH), significantly reduced the disease. Systemic protection against disease was evident even after 8 weeks of treatment. Analysis of leaf proteins of non-inoculated, inoculated and activator-treated both non-inoculated and inoculated plants (cv. Suprabha) by SDS-PAGE (Sodium dodecyl sulphate-polyacrylamide gel electrophoresis) and Image Master VDS-ID gel analysis version 3.0 showed 18 protein bands including 3-5 defence related proteins having molecular masses 67, 56, 32, 20 and 14 kDa. These defence proteins increased in activator-treated inoculated plants and enhanced the resistance against <i>P. aphanidermatum. In vitro </i>growth response of <i>P. aphanidermatum </i>to different conc. of SA,BABAand BTH was tested. SAand BABA,respectively were the most and least inhibitory to the fungus.
Description: 591-595
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.02(4) [October 2003]

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