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Do PFT1 and HY5 interact in regulation of sulfate assimilation by light in Arabidopsis?
Author(s) -
Koprivova Anna,
Calderwood Alexander,
Lee Bok-Rye,
Kopriva Stanislav
Publication year - 2014
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2014.02.031
Subject(s) - phytochrome , arabidopsis , assimilation (phonology) , biochemistry , enzyme , nitrate reductase , nitrogen assimilation , microbiology and biotechnology , transcription factor , chemistry , mutant , reductase , biology , botany , gene , red light , linguistics , philosophy
Sulfate assimilation pathway is highly responsive to changes in environment, but the mechanisms of such regulation are only slowly beginning to unravel. Here we show evidence that PHYTOCHROME AND FLOWERING TIME 1 (PFT1) may be another component of the sulfate assimilation regulatory circuit. Transcriptional regulation by light of the key enzyme of sulfate assimilation, adenosine 5′phosphosulfate (APS) reductase, is disturbed in pft1‐2 mutants. PFT1, however, affects also APS reductase enzyme activity, flux through the sulfate assimilation pathway and accumulation of glutathione. In addition, our data suggest a possible interplay of PFT1 with another transcription factor, HY5, in regulation of APS reductase by light.