REAL

EFFECT OF HEAT STRESS ON THE PHYSIOLOGICAL PROCESSES OF WHEAT

Balla, Krisztina and Karsai, Ildikó and Bencze, Szilvia and Kiss, Tibor and Veisz, Ottó (2013) EFFECT OF HEAT STRESS ON THE PHYSIOLOGICAL PROCESSES OF WHEAT. Acta Agronomica Hungarica, 61 (1). pp. 1-12. ISSN 0238-0161

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Abstract

Stress tolerance is associated with the activation of antioxidant compounds and enzyme systems that are capable of neutralising the reactive oxygen species (ROS) continually produced in response to stress. The present experiment was designed to compare the heat tolerance of four winter wheat varieties in the shooting and grain-filling stages by investigating changes detected in antioxidant enzyme activity and yield components in response to heat stress. Heat treatment was found to cause a significant rise in the activity of the glutathione- S-transferase and catalase enzymes, while there was usually a less intense decline in the activity of guaiacol peroxidase. An analysis of yield data revealed that heat stress had a more pronounced effect during grain filling in this experiment than at the beginning of shooting, as shown by the greater reduction in thousand-kernel weight and yield.

Item Type: Article
Uncontrolled Keywords: Key words: shooting stage, grain-filling stage, high temperature stress, antioxidant enzyme activity
Subjects: S Agriculture / mezőgazdaság > S1 Agriculture (General) / mezőgazdaság általában
S Agriculture / mezőgazdaság > SB Plant culture / növénytermesztés
Depositing User: Krisztina Bányainé Benkő
Date Deposited: 12 Nov 2013 10:25
Last Modified: 31 Mar 2014 23:15
URI: http://real.mtak.hu/id/eprint/6866

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