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Gene expression responses of paper birch (Betula papyrifera) to elevated CO2 and O3 during leaf maturation and senescence.
- Source :
-
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2010 Apr; Vol. 158 (4), pp. 959-68. Date of Electronic Publication: 2009 Nov 03. - Publication Year :
- 2010
-
Abstract
- Gene expression responses of paper birch (Betula papyrifera) leaves to elevated concentrations of CO(2) and O(3) were studied with microarray analyses from three time points during the summer of 2004 at Aspen FACE. Microarray data were analyzed with clustering techniques, self-organizing maps, K-means clustering and Sammon's mappings, to detect similar gene expression patterns within sampling times and treatments. Most of the alterations in gene expression were caused by O(3), alone or in combination with CO(2). O(3) induced defensive reactions to oxidative stress and earlier leaf senescence, seen as decreased expression of photosynthesis- and carbon fixation-related genes, and increased expression of senescence-associated genes. The effects of elevated CO(2) reflected surplus of carbon that was directed to synthesis of secondary compounds. The combined CO(2)+O(3) treatment resulted in differential gene expression than with individual gas treatments or in changes similar to O(3) treatment, indicating that CO(2) cannot totally alleviate the harmful effects of O(3).<br /> (2009 Elsevier Ltd. All rights reserved.)
- Subjects :
- Betula drug effects
Betula growth & development
Gene Expression Regulation, Plant drug effects
Oligonucleotide Array Sequence Analysis
Plant Leaves drug effects
Plant Leaves growth & development
Air Pollutants toxicity
Betula genetics
Carbon Dioxide metabolism
Gene Expression drug effects
Ozone toxicity
Plant Leaves genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1873-6424
- Volume :
- 158
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Environmental pollution (Barking, Essex : 1987)
- Publication Type :
- Academic Journal
- Accession number :
- 19889492
- Full Text :
- https://doi.org/10.1016/j.envpol.2009.10.008