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Acclimation of Arabidopsis thaliana to the light environment: the existence of separate low light and high light responses
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).ORCID-id: 0000-0002-7906-6891
2001 (Engelska)Ingår i: Planta, ISSN 0032-0935, E-ISSN 1432-2048, Vol. 213, nr 5, s. 794-801Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2001. Vol. 213, nr 5, s. 794-801
Nyckelord [en]
Arabidopsis (light acclimation), chlorophyll, light acclimation, light-harvesting, photosynthesis, photosystem
Identifikatorer
URN: urn:nbn:se:umu:diva-44599ISI: 000171254700016OAI: oai:DiVA.org:umu-44599DiVA, id: diva2:434848
Tillgänglig från: 2011-08-16 Skapad: 2011-06-09 Senast uppdaterad: 2018-06-08

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Jansson, Stefan

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