Table of Contents
Advances in Botany
Volume 2015, Article ID 150474, 11 pages
http://dx.doi.org/10.1155/2015/150474
Research Article

Radiation Processed Carrageenan Improves Plant Growth, Physiological Activities, and Alkaloids Production in Catharanthus roseus L.

1Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh 202 002, India
2College of Arts and Applied Sciences, Dhofar University, 2509 Salalah, Oman
3Botany Section, Women’s College, Aligarh Muslim University, Aligarh 202 002, India
4Radiation Technology Development Division, Bhabha Atomic Research Centre, Mumbai 400085, India

Received 24 July 2014; Accepted 9 December 2014

Academic Editor: Anis Limami

Copyright © 2015 M. Naeem et al. 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.

Abstract

Catharanthus roseus (L.) G. Don (Apocynaceae) is a medicinal plant that produces indole alkaloids used in cancer chemotherapy. Commercially important antineoplastic alkaloids, namely, vinblastine and vincristine, are mainly present in the leaves of C. roseus. Gamma-rays irradiated carrageenan (ICR) has been proven as plant growth promoting substance for a number of medicinal and agricultural plants. Considering the importance of ICR as a promoter of plant growth and alkaloids production in C. roseus, a pot experiment was carried out to explore the effect of ICR on the plant growth, physiological activities, and production of anticancer alkaloids in C. roseus at 120 and 150 days after planting (DAP). Foliar application of ICR (at 0, 20, 40, 60, 80, and 100 mg L−1) significantly improved the performance of C. roseus. 80 mg L−1 of ICR enhanced the leaf yield by 29.2 and 35.4% and the herbage yield by 32.5 and 37.4% at 120 and 150 DAP, respectively, over the control. The spray of ICR at 80 mg L−1 increased the yield of vinblastine by 64.3 and 65.0% and of vincristine by 75.5 and 77.0% at 120 and 150 DAP, respectively, as compared to the control.