NDLI: Influence of abiotic stresses on the antioxidant enzyme activity of cereals

Content Provider	Springer Nature Link
Author	Varga, Balázs Janda, Tibor László, Emese Veisz, Ottó
Copyright Year	2011
Abstract	The unfavourable effects of climate change were studied in terms of changes in the stress tolerance of cereals. Changes in the antioxidant enzyme activities were analysed as a function of the weather in a 2-year field experiment in order to determine the effect of extreme temperatures and rainfall conditions on the enzyme activity. The enzyme responses of two winter wheat genotypes to drought stress, simulated by withholding water completely for 7 days, were analysed under phytotronic conditions in three phenophases. The plants were raised either at ambient CO$_{2}$ concentration or at a doubled level. The quantities of glutathione reductase (GR), glutathione-S-transferase (GST), catalase (CAT), guaiacol peroxidase (POD) and ascorbate peroxidase (APX) were determined from leaf samples. The peroxidases had the most intense activity during the winter and early spring periods, with guaiacol peroxidase being dominant until the end of the winter. CAT generally became more active in late spring and summer, the activity being correlated with the development of water deficiency. The activity of GR, GST, POD and CAT was found to increase during the dry period, while the role of GR and POD was extremely important for resistance to low temperature.
Starting Page	849
Ending Page	858
Page Count	10
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	34
Issue Number	3
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-11-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate change Drought stress Antioxidant activity Elevated CO$_{2}$ Small grain cereals Plant Physiology Plant Biochemistry Plant Pathology Plant Genetics & Genomics Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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