The early dark-response in Arabidopsis thaliana revealed by cDNA microarray analysis

Plant Molecular Biology
Byung-Hoon Kim, Albrecht G von Arnim

Abstract

Despite intense research on light responses in plants, the consequences of a simple shift from light to darkness remain poorly characterized. We have examined the transcriptome of Arabidopsis thaliana seedling leaves upon a shift from constant light to darkness for between 1 and 8 h, while excluding most effects associated with circadian oscillation. Expression clustering and gene ontology analyses identified about 790 responsive genes implicated in diverse cellular processes. Compared to the better-studied long-term dark adaptation response, the early response to darkness is partially overlapping yet clearly distinct, encompassing early transient, early sustained, and late response clusters. The repressor of photomorphogenesis, COP1 (constitutive photomorphogenic 1), is not a chief regulator of the early response to darkness, in contrast to its well-established role during long-term dark adaptation and etiolation. Only part of the early dark response can be understood as the opposite of the response following a dark-to-light transition and as a response to sugar deprivation. Bioinformatic comparisons with published microarray datasets further suggest that abscisic acid (ABA) signaling plays a prominent role in the early respon...Continue Reading

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Citations

Jan 24, 2007·Plant Molecular Biology·Tatiana SuprunovaAbraham Korol
Aug 19, 2007·Plant & Cell Physiology·Yuzuki ManabeBrian Miki
Dec 25, 2007·The Plant Cell·Jan Bart RosselBarry J Pogson
Feb 27, 2008·Journal of Circadian Rhythms·Elsebeth KolmosSeth J Davis
Jul 31, 2012·Journal of Plant Physiology·Yun WangStephen Chivasa
Dec 17, 2008·The Plant Journal : for Cell and Molecular Biology·Byung-Hoon Kim, Albrecht G von Arnim
Jan 19, 2011·Plant, Cell & Environment·Krishna H Morker, Michael R Roberts
Sep 19, 2006·Current Opinion in Plant Biology·Séverine LorrainChristian Fankhauser

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