JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status

Search the Journal web-site through Google:

        Abstract - Issue Apr 2006, 27 (2)                                                                                                             Back


Respiration and activity of respiratory enzymes in okra (Abelmoschus esculentus) under seasonal environmental conditions of West Bengal, India


Supatra Sen and S. Mukherji

Plant Physiology Laboratory, Department of Botany, University of Calcutta, Kolkata-700 019, India


(Received: 27 August, 2004 ; Accepted: 10 March, 2005)



Abstract: Abelmoschus esculentus var. Parbani Kranti (okra) was studied in summer, rainy and winter seasons in pot culture and 28 and 58 day old leaves were collected to study the seasonal environmental empact on their respiratory metabolism. The rate of respiration along with the activity of three respiratory enzymes viz. fructose 1,6- bisphosphate aldolase, succinate dehydrogenase, glucose-6-phosphate dehydrogenase was highest in the summer season. Rainy and winter seasons showed comparatively low respiration rate and enzyme activity. Respiration rate and activity of the three above enzymes were also higher in the younger leaf samples, 28 days after sowing (DAS) as compared to the older leaf samples, 58 DAS in all the three seasons in the order of summer> rainy> winter. Since respiratory metabolism is an index of energy demand, summer is therefore a season of higher physiological activity as compared to rainy and winter. The present study indicates the alteration in respiratory activity in different seasons and developmental stages in okra, basides giving an idea of the energy demand under these changing environmental conditions, which can in turn, by correlated with the physiological behaviour of the plant.


Key words: Respiration, Respiratory enzymes, Okra plant, Seasonal variation, Abelmoschus esculentus



Copyright 2006 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).