Biología y Biomedicina >
Instituto de Biología Molecular y Celular de Plantas (IBMCP) >
(IBMCP) Artículos >
Closed Access item Low temperature regulates Arabidopsis Lhcb gene expression in a light-independent manner
|Authors:||Capel Salinas, Juan|
Jarillo, José A.
Madueño Albi, Francisco
Jorquera, María J.
Martínez-Zapater, José M.
|Publisher:||John Wiley & Sons|
|Citation:||The Plant Journal 13(3): 411–418, (1998)|
|Abstract:||Low temperature treatment of dark-grown seedlings of Arabidopsis thaliana results in a rapid increase in the amount of mRNAs encoding for the major polypeptides of the light-harvesting complex of photosystem II (Lhcb1 genes). This increase is transient and seems to be due mainly to the accumulation of Lhcb1*3 transcripts, indicating that low temperature differentially regulates the expression of the Arabidopsis Lhcb1 gene family in the dark. A 1.34 kb fragment of the Lhcb1*3 promoter is sufficient to confer low temperature regulation to a reporter gene in transgenic Arabidopsis etiolated seedlings, suggesting that the regulation is occurring at the transcriptional level. The cold-induced accumulation of Lhcb1*3 mRNA is not part of a general response to stressful conditions since no accumulation is detected in response to water stress, anaerobiosis or salt stress. The amount of Lhcb1*3 mRNA decrease in response to exogenous abscisic acid (ABA) suggesting that this phytohormone acts as a negative regulator. Moreover, the accumulation of Lhcb1*3 mRNAs in cold-treated ABA deficient etiolated seedlings is higher than that of wild-type and ABA insensitive etiolated seedlings, indicating that low temperature regulation of Lhcb1*3 is not mediated by ABA.|
|Publisher version (URL):||http://dx.doi.org/10.1046/j.1365-313X.1998.00039.x|
|E-ISSNmetadata.dc.identifier.doi = DOI:||1365-313X|
|Appears in Collections:||(IBMCP) Artículos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.