期刊
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
卷 1797, 期 4, 页码 466-475出版社
ELSEVIER
DOI: 10.1016/j.bbabio.2010.01.001
关键词
Energy dissipation; Non-photochemical quenching; Photosynthesis; Xanthophyll cycle; Zeaxanthin
资金
- Deutsche Forschungsgemeinschaft (DFG) [SFB 663]
The induction and relaxation of non-photochemical quenching (NPQ) under steady-state conditions, i.e. during up to 90 min of illumination at saturating light intensities, was studied in Arabidopsis thaliana. Besides the well-characterized fast qE and the very slow qI component of NPQ, the analysis of the NPQ dynamics identified a zeaxanthin (Zx) dependent component which we term qZ. The formation (rise time 10-15 min) and relaxation (lifetime 10-15 min) of qZ correlated with the synthesis and epoxidation of Zx, respectively. Comparative analysis of different NPQ mutants from Arabidopsis showed that qZ was clearly not related to qE, qT or qI and thus represents a separate, Zx-dependent NPQ component. (C) 2010 Elsevier B.V. All rights reserved.
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