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Antioxidant enzymes activity and physiological response of tomato (Lycopersicon esculentum M.) genotypes under mild temperature stress

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Title Antioxidant enzymes activity and physiological response of tomato (Lycopersicon esculentum M.) genotypes under mild temperature stress
 
Creator R. H. Laxman , N. K. S. Rao, Geeta Biradar , V. S. J. Sunoj, K. S. Shivashankara, C. B. Pavithra, K. H. Dhanyalakshmi, K. M. Manasa, R. M. Bhatt, A. T. Sadashiva, M. G. Christopher
 
Subject Climate change, Tomato, Temperature gradient tunnel , Scavenging enzyme activity, Physiological traits
 
Description Not Available
Tomato being sensitive to high temperature experiences mild to high temperature stresses under climate change conditions. To understand the response of tomato genotypes to mild temperature stress, a study was
conducted in temperature gradient tunnel facility. The results revealed that across the genotypes studied, specific activity of antioxidant enzymes viz., superoxide dismutase (SOD), peroxidase (POX) and glutathione reductase (GR) increased significantly. Among the genotypes, increase in SOD activity was highest in cv. Arka Vikas, followed by IIHR 2195 and least in Abhinava. The GR activity was highest in Abhinava, followed by IIHR 2195 and least in cv. Arka Vikas. The mild temperature stress caused reduction in catalase (CAT) activity. The decrease in CAT activity and concomitant increase in POX activity was observed in cv. Arka Vikas. Low leaf water potential (Wleaf) and higher electrolyte leakage indicated that the membrane integrity was affected across the tomato genotypes even under mild temperature stress. Among the genotypes studied, cv. Arka Vikas showed greater activity of SOD and POX, higher membrane stability and least
reduction in water potential under mild temperature stress.
ICAR under NICRA project
 
Date 2019-03-19T10:11:43Z
2019-03-19T10:11:43Z
2014-07-16
 
Type Article
 
Identifier Five
0019-5502
http://krishi.icar.gov.in/jspui/handle/123456789/17509
 
Language English
 
Relation Not Available;
 
Publisher Springer