期刊
JOURNAL OF PLANKTON RESEARCH
卷 32, 期 12, 页码 1609-1617出版社
OXFORD UNIV PRESS
DOI: 10.1093/plankt/fbq104
关键词
phytoplankton; photosynthesis; ecophysiology
资金
- National French Institute for Scientific Research-CNRS
- French consortium CPER-Littoral
- German Research Foundation-DFG [LA 2368/2-1]
How do pelagic microalgae cope with light changes in marine ecosystems? Is photosynthesis enhanced or depressed by frequent light fluctuations and how? These long-lasting questions are still under debate. A great diversity of responses has been documented relative to the spatial and temporal scale of study, the groups and species, etc. The answers to these questions probably lie in the interplay between fast photoregulation and longer term photoacclimation whose framework (amplitude, kinetics) is defined by environmental genetic adaptation. One of the main photoregulatory processes is the light-dependent operation of the so-called xanthophyll cycle (XC). XC is activated when the incident light becomes excessive with respect to its optimum necessary for maximization of photosynthesis. The present paper aims at (i) describing a short state-of-the-art on the XC functioning in microalgae with an ecophysiological point of view, (ii) discussing the relevance of the in situ XC operation and its response to the underwater light climate, (iii) addressing a series of open questions for filling the gap between XC functional features and field studies with respect to its role in the photophysiology of microalgae and its potential use for characterizing the hydrodynamics of water bodies.
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