uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Improper excess light energy dissipation in Arabidopsis results in a metabolic reprogramming
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Ecological Botany.
2009 (English)In: BMC Plant Biology, ISSN 1471-2229, Vol. 9, 12- p.Article in journal (Refereed) Published
Abstract [en]

Background. Plant performance is affected by the level of expression of PsbS, a key photoprotective protein involved in the process of feedback de-excitation (FDE), or the qE component of non-photochemical quenching, NPQ. Results. In studies presented here, under constant laboratory conditions the metabolite profiles of leaves of wild-type Arabidopsis thaliana and plants lacking or overexpressing PsbS were very similar, but under natural conditions their differences in levels of PsbS expression were associated with major changes in metabolite profiles. Some carbohydrates and amino acids differed ten-fold in abundance between PsbS-lacking mutants and over-expressers, with wild-type plants having intermediate amounts, showing that a metabolic shift had occurred. The transcriptomes of the genotypes also varied under field conditions, and the genes induced in plants lacking PsbS were similar to those reportedly induced in plants exposed to ozone stress or treated with methyl jasmonate (MeJA). Genes involved in the biosynthesis of JA were up-regulated, and enzymes involved in this pathway accumulated. JA levels in the undamaged leaves of field-grown plants did not differ between wild-type and PsbS-lacking mutants, but they were higher in the mutants when they were exposed to herbivory. Conclusion. These findings suggest that lack of FDE results in increased photooxidative stress in the chloroplasts of Arabidopsis plants grown in the field, which elicits a response at the transcriptome level, causing a redirection of metabolism from growth towards defence that resembles a MeJA/JA response.

Place, publisher, year, edition, pages
2009. Vol. 9, 12- p.
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-120351DOI: 10.1186/1471-2229-9-12ISI: 000264250500001PubMedID: 19171025OAI: oai:DiVA.org:uu-120351DiVA: diva2:303189
Available from: 2010-03-11 Created: 2010-03-11 Last updated: 2013-11-15Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Ågren, Jon
By organisation
Ecological Botany
In the same journal
BMC Plant Biology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 532 hits
ReferencesLink to record
Permanent link

Direct link