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Acclimation of Arabidopsis thaliana to the light environment: the existence of separate low light and high light responses
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: 0000-0002-7906-6891
2001 (English)In: Planta, ISSN 0032-0935, E-ISSN 1432-2048, Vol. 213, no 5, 794-801 p.Article in journal (Refereed) Published
Abstract [en]

The capacity for photosynthetic acclimation in Arabidopsis thaliana (L.) Heynh. cv. Landsberg erecta was assessed during growth over a broad range of irradiance. Discontinuities in the response to growth irradiance were revealed for the light- and CO2-saturated rate of photosynthesis (P-max) and the ratio of chlorophyll a to chlorophyll b (Chl a/b). Three separate phases in the response of P-max and Chl a/b to growth light were evident, with increases at low and high irradiance ranges and a plateau at intermediate irradiance. By measuring all chlorophyll-containing components of the thylakoid membrane that contribute to Chl alb we reveal that distinct strategies for growth at low and high irradiance underlie the discontinuous response. These strategies include, in addition to changes in the major light-harvesting complexes of photosystem II (LHCII) , large shifts in the amounts of both reaction centres as well as significant changes in the levels of minor LHCII and LHCI components.

Place, publisher, year, edition, pages
2001. Vol. 213, no 5, 794-801 p.
Keyword [en]
Arabidopsis (light acclimation), chlorophyll, light acclimation, light-harvesting, photosynthesis, photosystem
Identifiers
URN: urn:nbn:se:umu:diva-44599ISI: 000171254700016OAI: oai:DiVA.org:umu-44599DiVA: diva2:434848
Available from: 2011-08-16 Created: 2011-06-09 Last updated: 2017-12-08

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