Table of Contents
ISRN Biotechnology
Volume 2014, Article ID 305349, 5 pages
Research Article

Effect of Chitosan on Rhizome Rot Disease of Turmeric Caused by Pythium aphanidermatum

Department of Plant Science, Bharathidasan University, Tiruchirappalli, Tamilnadu 620 024, India

Received 17 December 2013; Accepted 13 February 2014; Published 6 March 2014

Academic Editors: S. Revah and H. Stamatis

Copyright © 2014 Sathiyanarayanan Anusuya and Muthukrishnan Sathiyabama. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Chitosan was evaluated for its potential to induce antifungal hydrolases in susceptible turmeric plant (Curcuma longa L.). Under field conditions, the application of chitosan (crab shell) to turmeric plants by foliar spray method induces defense enzymes such as chitinases and chitosanases. Such an increase in enzyme activity was enhanced by spraying chitosan (0.1% w/v) on leaves of turmeric plants at regular intervals. Gel electrophoresis revealed new chitinase and chitosanase isoforms in leaves of turmeric plants treated with chitosan. Treated turmeric plants showed increased resistance towards rhizome rot disease caused by Pythium aphanidermatum, whereas control plants expressed severe rhizome rot disease. Increased activity of defense enzymes in leaves of chitosan treated turmeric plants may play a role in restricting the development of disease symptoms. The eliciting properties of chitosan make chitosan a potential antifungal agent for the control of rhizome rot disease of turmeric.