Control of the maximal chlorophyll fluorescence yield by the Q(B) binding site

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F18%3A00489336" target="_blank" >RIV/61388971:_____/18:00489336 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11099-018-0768-x" target="_blank" >http://dx.doi.org/10.1007/s11099-018-0768-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11099-018-0768-x" target="_blank" >10.1007/s11099-018-0768-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Control of the maximal chlorophyll fluorescence yield by the Q(B) binding site

Popis výsledku v původním jazyce

Differences in maximal yields of chlorophyll variable fluorescence (F-m) induced by single turnover (ST) and multiple turnover (MT) excitation are as great as 40%. Using mutants of Chlamydomonas reinhardtii we investigated potential mechanisms controlling F-m above and beyond the Q(A) redox level. F-m was low when the Q(B) binding site was occupied by PQ and high when the Q(B) binding site was empty or occupied by a PSII herbicide. Furthermore, in mutants with impaired rates of plastoquinol reoxidation, F-m was reached rapidly during MT excitation. In PSII particles with no mobile PQ pool, F-m was virtually identical to that obtained in the presence of PSII herbicides. We have developed a model to account for the variations in maximal fluorescence yields based on the occupancy of the Q(B) binding site. The model predicts that the variations in maximal fluorescence yields are caused by the capacity of secondary electron acceptors to reoxidize Q(A)(-).

Název v anglickém jazyce

Control of the maximal chlorophyll fluorescence yield by the Q(B) binding site

Popis výsledku anglicky

Differences in maximal yields of chlorophyll variable fluorescence (F-m) induced by single turnover (ST) and multiple turnover (MT) excitation are as great as 40%. Using mutants of Chlamydomonas reinhardtii we investigated potential mechanisms controlling F-m above and beyond the Q(A) redox level. F-m was low when the Q(B) binding site was occupied by PQ and high when the Q(B) binding site was empty or occupied by a PSII herbicide. Furthermore, in mutants with impaired rates of plastoquinol reoxidation, F-m was reached rapidly during MT excitation. In PSII particles with no mobile PQ pool, F-m was virtually identical to that obtained in the presence of PSII herbicides. We have developed a model to account for the variations in maximal fluorescence yields based on the occupancy of the Q(B) binding site. The model predicts that the variations in maximal fluorescence yields are caused by the capacity of secondary electron acceptors to reoxidize Q(A)(-).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

<a href="/cs/project/LO1416" target="_blank" >LO1416: Algatech plus</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Photosynthetica

ISSN

0300-3604

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

150-162

Kód UT WoS článku

000430309200013

EID výsledku v databázi Scopus

2-s2.0-85040336704