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Early and delayed long-term transcriptional changes and short-term transient responses during cold acclimation in olive leaves.
- Source :
- DNA Research; Feb2015, Vol. 22 Issue 1, p1-11, 11p
- Publication Year :
- 2015
-
Abstract
- Low temperature severely affects plant growth and development. To overcome this constraint, several plant species from regions having a cool season have evolved an adaptive response, called cold acclimation. We have studied this response in olive tree (Olea europaea L.) cv. Picual. Biochemical stress markers and cold-stress symptoms were detected after the first 24 h as sagging leaves. After 5 days, the plants were found to have completely recovered. Control and cold-stressed plants were sequenced by Illumina HiSeq 1000 paired-end technique. We also assembled a new olive transcriptome comprising 157,799 unigenes and found 6,309 unigenes differentially expressed in response to cold. Three types of response that led to cold acclimation were found: short-term transient response, early long-term response, and late long-term response. These subsets of unigenes were related to different biological processes. Early responses involved many cold-stress-responsive genes coding for, among many other things, C-repeat binding factor transcription factors, fatty acid desaturases, wax synthesis, and oligosaccharide metabolism. After long-term exposure to cold, a large proportion of gene down-regulation was found, including photosynthesis and plant growth genes. Up-regulated genes after long-term cold exposure were related to organelle fusion, nucleus organization, and DNA integration, including retrotransposons. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 13402838
- Volume :
- 22
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- DNA Research
- Publication Type :
- Academic Journal
- Accession number :
- 101061421
- Full Text :
- https://doi.org/10.1093/dnares/dsu033