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High light acclimation of Chromera velia points to photoprotective NPQ

SYSNO ASEP	0488826
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	High light acclimation of Chromera velia points to photoprotective NPQ
Author(s)	Belgio, Erica (MBU-M) Trsková, Eliška (MBU-M) Kotabová, Eva (MBU-M)_{RID, ORCID} Ewe, Daniela (MBU-M)_ORCID Prášil, Ondřej (MBU-M)_{RID, ORCID} Kaňa, Radek (MBU-M)_{RID, ORCID}
Source Title	Photosynthesis Research. - : Springer - ISSN 0166-8595 Roč. 135, 1-3 SI (2018), s. 263-274
Number of pages	12 s.
Language	eng - English
Country	NL - Netherlands
Keywords	Nonphotochemical quenching ; Photoinhibition ; Chromera velia alga
Subject RIV	EE - Microbiology, Virology
OECD category	Microbiology
R&D Projects	LO1416 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA16-10088S GA ČR - Czech Science Foundation (CSF)
	GJ17-02363Y GA ČR - Czech Science Foundation (CSF)
Institutional support	MBU-M - RVO:61388971
UT WOS	000423338500025
EID SCOPUS	85017426159
DOI	10.1007/s11120-017-0385-8
Annotation	It has previously been shown that the long-term treatment of Arabidopsis thaliana with the chloroplast inhibitor lincomycin leads to photosynthetic membranes enriched in antennas, strongly reduced in photosystem II reaction centers (PSII) and with enhanced nonphotochemical quenching (NPQ) (Belgio et al. Biophys J 102:2761-2771, 2012). Here, a similar physiological response was found in the microalga Chromera velia grown under high light (HL). In comparison to cells acclimated to low light, HL cells displayed a severe re-organization of the photosynthetic membrane characterized by (1) a reduction of PSII but similar antenna content, (2) partial uncoupling of antennas from PSII, (3) enhanced NPQ. The decrease in the number of PSII represents a rather unusual acclimation response compared to other phototrophs, where a smaller PSII antenna size is more commonly found under high light. Despite the diminished PSII content, no net damage could be detected on the basis of the Photosynthesis versus irradiance curve and electron transport rates pointing at the excess capacity of PSII. We therefore concluded that the photoinhibition is minimized under high light by a lower PSII content and that cells are protected by NPQ in the antennas.
Workplace	Institute of Microbiology
Contact	Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231
Year of Publishing	2019

Number of the records: 1