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Plants at high altitude exhibit higher component of alternative respiration

IR@CSIR-IHBT

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Title Plants at high altitude exhibit higher component of
alternative respiration
 
Creator Kumar, Neeraj
Vyas, D
Kumar , Sanjay
 
Subject Plant Biotechnology
 
Description 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.
 
Date 2007
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://ihbt.csircentral.net/239/1/physio.pdf
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.
 
Relation http://ihbt.csircentral.net/239/