Chilling effects on primary photosynthetic processes in Medicago sativa: Acclimatory changes after short- and long-term exposure to low temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26296080%3A_____%2F20%3AN0000038" target="_blank" >RIV/26296080:_____/20:N0000038 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/20:00116389

Výsledek na webu

<a href="http://www.vupt.cz" target="_blank" >http://www.vupt.cz</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/s11756-020-00470-6" target="_blank" >10.2478/s11756-020-00470-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chilling effects on primary photosynthetic processes in Medicago sativa: Acclimatory changes after short- and long-term exposure to low temperatures

Popis výsledku v původním jazyce

Two cutivars (cv.) of alfalfa (Medicago sativa L.) were used to study the influence of chilling on chlorophyll fluorescence parameters related to the photosynthetic performance of photosystem II (PS II). Potted plants were exposed to two chilling treatments (10 and 5 °C) for 15 and 22 days, respectively. After the chilling, basic chlorophyll fluorescence parameters (FV/FM, ΦPSII, qN) and chlorophyll fluorescence signals emitted from light-harvesting complexes (F0 — backgroung chlorophyll fluorescence) weremeasured by slow Kautsky kinetics supplemented by quenching analysis. Short-term effect of 5 °C was evaluated by fast chlorophyll fluorescence transients (OJIPs). Chilling did not lead to any change in FV/FM and ΦPSII in both cultivars, indicating their chilling tolerance. Background chlorophyll fluorescence showed a chilling-induced increase in the cv. Zuzana but not the cv. Holyna. The F0 increase was attributed to functional detachment of light-harvesting complexes from core PS II. In both cultivars, chilling treatment led to a decrease in non-photochemical quenching (qN). This decrease was attributed to a long-term acclimation of plants to low temperatures and the adjustment of PS II processes and photosynthetic performance. The shape of OJIP curves and OJIP-derived chlorophyll fluorescence parameters were found to be temperature-dependent after a short-term exposition to 5 °C. Both alfalfa cultivars showed chilling tolerance; however, the results suggest that the cv. Holyna may be more chilling-tolerant than the cv. Zuzana.

Název v anglickém jazyce

Chilling effects on primary photosynthetic processes in Medicago sativa: Acclimatory changes after short- and long-term exposure to low temperatures

Popis výsledku anglicky

Two cutivars (cv.) of alfalfa (Medicago sativa L.) were used to study the influence of chilling on chlorophyll fluorescence parameters related to the photosynthetic performance of photosystem II (PS II). Potted plants were exposed to two chilling treatments (10 and 5 °C) for 15 and 22 days, respectively. After the chilling, basic chlorophyll fluorescence parameters (FV/FM, ΦPSII, qN) and chlorophyll fluorescence signals emitted from light-harvesting complexes (F0 — backgroung chlorophyll fluorescence) weremeasured by slow Kautsky kinetics supplemented by quenching analysis. Short-term effect of 5 °C was evaluated by fast chlorophyll fluorescence transients (OJIPs). Chilling did not lead to any change in FV/FM and ΦPSII in both cultivars, indicating their chilling tolerance. Background chlorophyll fluorescence showed a chilling-induced increase in the cv. Zuzana but not the cv. Holyna. The F0 increase was attributed to functional detachment of light-harvesting complexes from core PS II. In both cultivars, chilling treatment led to a decrease in non-photochemical quenching (qN). This decrease was attributed to a long-term acclimation of plants to low temperatures and the adjustment of PS II processes and photosynthetic performance. The shape of OJIP curves and OJIP-derived chlorophyll fluorescence parameters were found to be temperature-dependent after a short-term exposition to 5 °C. Both alfalfa cultivars showed chilling tolerance; however, the results suggest that the cv. Holyna may be more chilling-tolerant than the cv. Zuzana.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

<a href="/cs/project/EF16_013%2F0001708" target="_blank" >EF16_013/0001708: ECOPOLARIS - Změny ve struktuře a funkci součástí terestrických polárních ekosystémů (CzechPolar2)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Biologia

ISSN

0006-3088

e-ISSN

1336-9563

Svazek periodika

75

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

‏ 1105-1114

Kód UT WoS článku

000521859900001

EID výsledku v databázi Scopus

—