Transcript profiling of the hypomethylated hog1 mutant of Arabidopsis

Transcript profiling of the hypomethylated hog1 mutant of Arabidopsis Transcript profiling was used to look for genes that differ in expression between the SAH hydrolase deficient and hypomethylated hog1-1 mutant and the parental (HOG1) line. This analysis identified a subset of gene transcripts that were up-regulated in hog1-1 plants. The majority of these transcripts were from genes located in the pericentromeric heterochromatin. About a third of the genes are annotated as transposons or having transposon homology. Subsequent experiments using Northern blots, RT-PCR and real-time RT-PCR confirmed the up-regulation of 19 of the genes and identified a set of molecular probes for genes that are up-regulated in the hog1-1 background. Six (of six genes tested) of the hog1-1 up-regulated genes are also up-regulated in the hypomethylated ddm1 mutant, three in the hypomethylated met1 mutant and three in the dcl3 mutant. The results suggest that the hypomethylation in the mutant lines may have a causal role in the up-regulation of these transcripts. Plant Molecular Biology Springer Journals

Transcript profiling of the hypomethylated hog1 mutant of Arabidopsis

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Springer Netherlands
Copyright © 2007 by Springer Science+Business Media B.V.
Life Sciences; Plant Pathology; Biochemistry, general; Plant Sciences
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