Kumar, Neeraj and Vyas, D and Kumar , Sanjay (2007) Plants at high altitude exhibit higher component of alternative respiration. Journal of Plant Physiology, 164. pp. 31-38.

[img] PDF
Restricted to Registered users only

Download (179Kb)


Total respiration, capacities of cytochrome (CytR) and alternative respiration (AR) were studied in two varieties of barley (Horedum vulgare) and wheat (Triticum aestivum) each and one variety of pea (Pisum sativum) at low (Palampur; 1300 m) and high altitudes (Kibber; 4200 m). Similar studies were carried out in naturally growing Rumex nepalensis and Trifoilum repenses at Palampur, Palchan (2250 m) and Marhi (3250 m). All the plants species exhibited lower CytR but significantly higher AR capacity at high altitude (HA) (72–1117% higher) as compared to those at low altitude (LA). Glycolytic product, pyruvate and tricarboxylic acid cycle intermediate, citrate increased with increase in altitude. While the role of these metabolites in relation to HA biology is discussed, significantly higher AR at HA is proposed to be an adaptive mechanism against the metabolic perturbations wherein it might act to lower reactive oxygen species and also provides metabolic homeostasis to plants under the environment of HA.

Item Type: Article
Uncontrolled Keywords: Alternative respiration; Altitude; Cytochrome respiration; Respiration
Subjects: Plant Biotechnology
Depositing User: Dr. Aparna Maitra Pati
Date Deposited: 29 Dec 2011 10:30
Last Modified: 06 Feb 2012 05:56
URI: http://ihbt.csircentral.net/id/eprint/239

Actions (login required)

View Item View Item