Document Detail


Differential effects of cold acclimation and abscisic acid on free amino acid composition in wheat.
MedLine Citation:
PMID:  21421348     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The effect of cold acclimation and abscisic acid (ABA) treatment on the free amino acid composition was compared in Chinese Spring chromosome 5A substitution lines with different levels of freezing tolerance. The total amino acid content gradually increased during the 3-week cold acclimation period, while the effect of ABA became visible only after 7 d. The ratio of members of the glutamate family increased during cold acclimation and the ratio of amino acids belonging to the aspartate family decreased. Opposite changes were observed after treatment with ABA. Consistently with these results, ABA only induced a major increase in the Asn content, while the Asp, Glu, Gln and Pro levels were greatly induced by cold. A corresponding alteration at the gene expression level was only found for Pro and Glu. With the exception of Pro, cold- or ABA-induced changes in the amino acid levelsor Pro, did not correlate with the freezing tolerance of the three genotypes examined and were not affected by chromosome 5A. Since cold acclimation induced the accumulation of most of the amino acids, while ABA had a significant effect only on Asn, the cold-induced changes in free amino acid levels were probably not mediated by ABA.
Authors:
Zita Kovács; Livia Simon-Sarkadi; Csongor Sovány; Klára Kirsch; Gábor Galiba; Gábor Kocsy
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Publication Detail:
Type:  Journal Article     Date:  2010-08-26
Journal Detail:
Title:  Plant science (Shannon, Ireland)     Volume:  180     ISSN:  0168-9452     ISO Abbreviation:  Plant Sci.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-03-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882015     Medline TA:  Plant Sci     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  61-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary.
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