Počet záznamů: 1
The Xanthophyll Cycle in Green Algae (Chlorophyta): Its Role in the Phptosynthetic Apparatus
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SYSNO ASEP 0100434 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název The Xanthophyll Cycle in Green Algae (Chlorophyta): Its Role in the Phptosynthetic Apparatus Překlad názvu Xanthofylový cyklus v zelených řasách (Chlophyta): jeho úloha ve fotosyntetickém aparátu Tvůrce(i) Masojídek, Jiří (MBU-M) RID, ORCID
Kopecký, Jiří (MBU-M) ORCID
Koblížek, Michal (MBU-M) RID, ORCID
Torzillo, G. (IT)Zdroj.dok. Plant Biology. - : Wiley - ISSN 1435-8603
Roč. 6, - (2004), s. 342-349Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova microlgae ; fluorescence ; non-photochemical Vědní obor RIV EI - Biotechnologie a bionika CEP LN00A141 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Anotace Light dependent conversion of violaxanthin to zeaxanthin, so called xanthophyll cycle was shown to serve as a major, short-term light acclimation mechanism in higher plants. The role of xanthophylls in thermal dissipation of surplus excitation energy was deduced from the linear relationship between zeaxanthin formation and the magnitude of nonphotochemical quenching. Unlike in higher plants, the role of xanthophyll cycle in green algae (Chlorophyta) is ambiguous since its contribution to energy dissipation can significantly vary among species. Here, we have studied the role of the xanthophyll cycle in the adaptation of several species of green algae (Chlorella, Scenedesmus, Haematococcus, Chlorococcum, Spongiochloris) to high irradiance. The xanthophyll cycle has been found functional in all tested organisms; however its contribution to nonphotochemical quenching is not as significant as in higher plants. This conclusion is supported by three facts: (i) in green algae the content of zeaxanthin normalized per chlorophyll was significantly lower than that reported from higher plants, (ii) antheraxanthin + zeaxanthin content displayed different diel kinetics than NPQ and (iii) in green algae there was no such a linear relationship between NPQ and Ax+Zx as shown in higher plants. We assume that microalgae rely on other dissipation mechanism(s), which operate along with the xanthophyll cycle-dependent quenching. Pracoviště Mikrobiologický ústav Kontakt Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Rok sběru 2005
Počet záznamů: 1