Salt-specific regulation of the cytosolic O-acetylserine(thiol)lyase gene from Arabidopsis thaliana is dependent on abscisic acid.
作者： Consuelo Barroso , Luis C. Romero , Francisco J. Cejudo , José M. Vega , Cecilia Gotor
关键词: O-Acetylserine 、 Biochemistry 、 Biology 、 Cysteine 、 Lyase Gene 、 Glutathione 、 Arabidopsis 、 Lyase 、 Arabidopsis thaliana 、 Abscisic acid
摘要: The expression of Atcys-3A gene coding for cytosolic O-acetylserine(thiol)lyase, a key enzyme in cysteine biosynthesis, from Arabidopsis thaliana is significantly induced by exposure to salt and heavy-metal stresses. Addition NaCl mature plants rapid accumulation the mRNA throughout leaf lamina roots, later on stems, being mainly restricted vascular tissues. salt-specific regulation was also mediated abscisic acid (ABA) since: (1) exogenous addition ABA culture medium mimicked salt-induced plant response raising level transcript, (2) mutants aba-1 abi2-1 were not able respond NaCl. Our results suggest that high rate biosynthesis required under stress necessary protection or adaptation mechanism. This hypothesis supported observation intracellular levels glutathione increased up 3-fold after treatment.
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