High light acclimation of Chromera velia points to photoprotective NPQ

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897836" target="_blank" >RIV/60076658:12310/18:43897836 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388971:_____/18:00488826

Výsledek na webu

<a href="https://link.springer.com/content/pdf/10.1007%2Fs11120-017-0385-8.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs11120-017-0385-8.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11120-017-0385-8" target="_blank" >10.1007/s11120-017-0385-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High light acclimation of Chromera velia points to photoprotective NPQ

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

High light acclimation of Chromera velia points to photoprotective NPQ

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Photosynthesis Research

ISSN

0166-8595

e-ISSN

—

Svazek periodika

135

Číslo periodika v rámci svazku

1-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

263-274

Kód UT WoS článku

000423338500025

EID výsledku v databázi Scopus

2-s2.0-85017426159