Response of short-term heat shock on photosynthetic activity of soil crust cyanobacteria

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901249" target="_blank" >RIV/60076658:12310/20:43901249 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/20:00525223

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s00709-019-01418-7" target="_blank" >https://link.springer.com/article/10.1007/s00709-019-01418-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00709-019-01418-7" target="_blank" >10.1007/s00709-019-01418-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Response of short-term heat shock on photosynthetic activity of soil crust cyanobacteria

Popis výsledku v původním jazyce

Short-term heat exposure in tropical regions can generate severe stress in the photosynthetic activity of soil crust cyanobacteria. We investigated the responses of two filamentous cyanobacteria, Scytonema tolypothrichoides and Tolypothrix bouteillei, to 1hr exposure at 35, 45, and 55 degrees C using variable chlorophyll fluorescence. Protocols for maximum quantum yield (F-V/F-M) and dark recovery of chlorophyll a fluorescence (OJIP) transient were applied. Heat exposure caused damage to the donor side of PSII, indicated by a decrease in F-V/F-M and a rapid increase in F-0. After heat stress, photochemical energy utilization (phi(Po), phi(ETo), and phi(RE1o)) declined and energy dissipation (phi(DIo)) increased. At 45 degrees C, the photosynthetic apparatus was reversibly damaged, since full recovery was observed after 7 days of relaxation. S. tolypothrichoides was more resistant to heat stress than T. bouteillei, confirming better adaptation to higher temperatures as observed in growth experiments.

Název v anglickém jazyce

Response of short-term heat shock on photosynthetic activity of soil crust cyanobacteria

Popis výsledku anglicky

Short-term heat exposure in tropical regions can generate severe stress in the photosynthetic activity of soil crust cyanobacteria. We investigated the responses of two filamentous cyanobacteria, Scytonema tolypothrichoides and Tolypothrix bouteillei, to 1hr exposure at 35, 45, and 55 degrees C using variable chlorophyll fluorescence. Protocols for maximum quantum yield (F-V/F-M) and dark recovery of chlorophyll a fluorescence (OJIP) transient were applied. Heat exposure caused damage to the donor side of PSII, indicated by a decrease in F-V/F-M and a rapid increase in F-0. After heat stress, photochemical energy utilization (phi(Po), phi(ETo), and phi(RE1o)) declined and energy dissipation (phi(DIo)) increased. At 45 degrees C, the photosynthetic apparatus was reversibly damaged, since full recovery was observed after 7 days of relaxation. S. tolypothrichoides was more resistant to heat stress than T. bouteillei, confirming better adaptation to higher temperatures as observed in growth experiments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

<a href="/cs/project/LM2015078" target="_blank" >LM2015078: Česká polární výzkumná infrastruktura</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Protoplasma

ISSN

0033-183X

e-ISSN

—

Svazek periodika

257

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

13

Strana od-do

61-73

Kód UT WoS článku

000511940500006

EID výsledku v databázi Scopus

2-s2.0-85069929756