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Respiratory acclimation in Arabidopsis thaliana leaves at low temperature.
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).ORCID iD: 0000-0001-5900-7395
2004 (English)In: Journal of Plant Physiology, ISSN 0176-1617, Vol. 161, no 5, 573-9 p.Article in journal (Refereed) Published
Abstract [en]

Acclimation of 25 °C-grown Arabidopsis thaliana at 5 °C resulted in a marked increase of leaf respiration in darkness (Rd) measured at 5 °C. Rd was particularly high in leaves developed at 5 °C. Leaf respiration (non-photorespiratory intracellular decarboxylation) in the light (Rl) also increased during cold acclimation, but less so than did Rd. The ratio Rd/Pt (Pt - true photosynthesis) was higher in more acclimated or cold-developed leaves, while the ratio Rl/Pt remained unchanged. In cold-acclimated leaves, Rl did not correlate with 3-phosphoglycerate and pyruvate nor with hexose phosphate pools in the cytosol. Rl in A. thaliana leaves was probably not limited by the substrate during cold acclimation. Under the conditions tested, Rd was more sensitive to low temperature stress than Rl.

Place, publisher, year, edition, pages
2004. Vol. 161, no 5, 573-9 p.
Keyword [en]
Acclimatization, Arabidopsis/*physiology, Cold, Darkness, Glyceric Acids/analysis, Light, Phosphoric Monoester Hydrolases/analysis, Photosynthesis, Plant Leaves/chemistry/metabolism/*physiology, Pyruvic Acid/analysis, Temperature
URN: urn:nbn:se:umu:diva-15785DOI: doi:10.1078/0176-1617-01054PubMedID: 15202714OAI: diva2:155457
Available from: 2007-07-31 Created: 2007-07-31 Last updated: 2015-04-29Bibliographically approved

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Gardeström, Per
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Department of Plant PhysiologyUmeå Plant Science Centre (UPSC)

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