GENERAL FEATURES OF PHOTOPROTECTION BY ENERGY DISSIPATION IN PLANKTONIC DIATOMS (BACILLARIOPHYCEAE) 1

By J. Lavaud, B. Rousseau, A. Etienne. 2004

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Planktonic diatoms (Bacillariophyceae) have to cope with large fluctuations of light intensity and periodic exposure to high light. After a shift to high light, photoprotective dissipation of excess energy characterized by the nonphotochemical quenching of fluorescence (NPQ) and the concomitant deepoxidation of diadinoxanthin to diatoxanthin (DT) were measured in four different planktonic marine diatoms (Bacillariophyceae): Skeletonema costatum (Greville) Cleve, Cylindrotheca fusiformis Reimann et Lewin, Thalassiosira weissflogii (Grunow) Fryxell et Hasle, and Ditylum brightwellii (West) Grunow in comparison to the model organism Phaeodactylum tricornutum Böhlin. Upon a sudden increase of light intensity, deepoxidation was rapid and de novo synthesis of DT also occurred. In all species, NPQ was linearly related to the amount of DT formed during high light. In this report, we focused on the role of DT in the dissipation of energy that takes place in the light‐harvesting complex. In S. costatum for the same amount of DT, less NPQ was formed than in P. tricornutum and as a consequence the photoprotection of PSII was less efficient. The general features of photoprotection by harmless dissipation of excess energy in planktonic diatoms described here partly explain why diatoms are well adapted to light intensity fluctuations.

Subfields: Biomaterials, Molecular Biology, Oceanography

View Paper: https://www.semanticscholar.org/paper/cb969d0a1224d914279568ba009d3e50208a6e13

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Citations in the corpus

Photoprotection capacity differs among diatoms: Possible consequences on the spatial distribution of diatoms related to fluctuations in the underwater light climate (2007, background): “The lower NPQ in S. costatum could be because of a different LHC antenna polypeptide composition and organization, because of fewer xanthophylls involved in the NPQ process, or because of both conditions (Lavaud et al. 2004; Ruban et al. 2004).”
Fast Regulation of Photosynthesis in Diatoms: Mechanisms, Evolution and Ecophysiology (2007, background): “Nevertheless, not all the additional DT, also arising from the de novo synthesis, molecules are involved in NPQ (Casper-Lindley and Bjorkman 1998; Lavaud et al. 2004; Schumann et al. 2007).”
Physiological versus behavioral photoprotection in intertidal epipelic and epipsammic benthic diatom communities (2011, methodology): “Using the same method, Perkins et al. (2010) have compared behavioral and physiological down regulation in an epipelic diatom community and concluded that vertical cell movement was the primary response to increasing light dose.”
Photophysiology in two major Southern Ocean phytoplankton taxa: Photoprotection in Phaeocystis antarctica and Fragilariopsis cylindrus (2009, background): “Although NPQ levels can be three to five times larger in diatoms than in higher plants (Ruban et al. 2004), the efficiency of xanthophyll cycle–mediated photoprotection can vary between species (Lavaud et al. 2004).”
Light response curve methodology and possible implications in the application of chlorophyll fluorescence to benthic diatoms (2006, background): “Rapid processes known to occur to a higher extent and with more 391 rapid induction kinetics in diatoms are the xanthophyll cycle (Jakob et al 2001; 392 Lavaud et al 2004), NPQ (Lavaud et al. 2002a; Ruban et al 2004, Serôdio et al. 393 2005b) and the PS II electron cycle (Lavaud et al 2002b).”
Pigments and photoacclimation processes (2011, background): “This diversity may affect the survival and the growth of species under high light and therefore their competitive ability, affecting the patterns of algal succession in phytoplankton community (Demers et al., 1991; Lavaud et al., 2004).”
Photosynthetic activity, photoprotection and photoinhibition in intertidal microphytobenthos as studied in situ using variable chlorophyll fluorescence (2008, background): “Diatoms are known to have the capacity to develop very high levels of non-photochemical quenching under high light stress (‘super-quenching’; Ruban et al., 2004; Lavaud et al., 2004), which has been shown to provide effective photoprotection against photoinhibition in estuarine species, both plankto”
Estimating phytoplankton primary production in Lake IJsselmeer (The Netherlands) using variable fluorescence (PAM-FRRF) and C-uptake techniques (2008, background): “…mechanism is present in most microalgae (Ibelings et al., 1994; Olaizola & Yamamoto, 1994; Ting & Owens, 1994; Flameling & Kromkamp, 1998; Lavaud et al., 2004), but is believed to be absent in cyanobacteria (Campbell et al., 1998), although recent evidence suggests the contrary…”
NUTRIENT LIMITATION AND HIGH IRRADIANCE ACCLIMATION REDUCE PAR AND UV‐INDUCED VIABILITY LOSS IN THE ANTARCTIC DIATOM CHAETOCEROS BREVIS (BACILLARIOPHYCEAE) 1 (2005, background): “This process constitutes a general feature of photoprotection in diatoms, comparable with the violaxanthinantheraxanthin-zeaxanthin cycle in higher plants (Olaizola et al. 1994, Lavaud et al. 2004).”
Vertical cell movement is a primary response of intertidal benthic biofilms to increasing light dose (2010, background): “The process utilises energisation of the thylakoid membrane by generation of a proton gradient, which induces de-epoxidation of diadinoxanthin (DD) to diatoxanthin (DT) known as the xanthophyll cycle (Lavaud et al. 2002a, 2004, Goss et al. 2006, Lavaud 2007).”