Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 108682, 7 pages
Research Article

Effect of Allelochemicals from Leaf Leachates of Gmelina arborea on Inhibition of Some Essential Seed Germination Enzymes in Green Gram, Red Gram, Black Gram, and Chickpea

1Department of Biotechnology, PSG College of Arts and Science, Coimbatore, Tamil Nadu 641014, India
2Department of Chemical Engineering, Annamalai University, Annamalai Nagar, Tamil Nadu 608002, India
3Department of Microbiology, PSG College of Arts and Science, Coimbatore, Tamil Nadu 641014, India

Received 6 March 2014; Accepted 21 June 2014; Published 1 September 2014

Academic Editor: Giuseppe Maurizio Campo

Copyright © 2014 Ramakrishnan Madhan Shankar 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.


The present work focused on identification of allelochemicals from the leaf leachates of Gmelina arborea and analyzing its influence on the germination of red gram, green gram, black gram, and chickpea in terms of the levels of some important germination enzymes like acid phosphatase, catalase, peroxidase, and amylase. The study showed that allelopathic effects were more predominant in chickpea with 80% followed by red gram, green gram, and black gram where the inhibition ranged between 26% and 75%. The vigor index in the seed lots is also considerably reduced. Total chlorophyll content was also reduced by allelopathic effect in all treated seeds ranging between 0.7 and 7.5 μg/g dry weight. The effect of allelochemicals drastically reduced the relative water content in red gram followed by the other seed lots. The total protein content varied considerably in the control and the treated seed lots. Allelochemicals inhibited the expression and activity of the enzymes required for efficient germination. The present study also threw limelight on the effective use of this tree, wherein planting this tree amidst pulse related herb plantations could affect the growth of the economically viable plants, but this tree can very well adapt to diversified soil conditions and rainfall zones.