Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F24%3A00599757" target="_blank" >RIV/86652079:_____/24:00599757 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/24:00137937

Výsledek na webu

<a href="https://journals.muni.cz/CPR/article/view/39280" target="_blank" >https://journals.muni.cz/CPR/article/view/39280</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5817/CPR2024-1-1" target="_blank" >10.5817/CPR2024-1-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

Popis výsledku v původním jazyce

We investigated the relationship between relative water content (RWC) of Antarctic moss Chorisodontium aciphyllum and several chlorophyll fluorescence parameters evaluating primary photochemical processes of photosynthesis. During the gradual dehydration of Ch. aciphyllum from fully wet (RWC=100%) to dry (RWC=0%) state, progression of NPQ (non-photochemical quenching) induction curves were recorded, the maximum NPQ (NPQ(max)) attained at the end of illumination period (10 min.), and NPQ relaxation in dark were all analysed. Induction curves of photosynthetic electron transport rate (ETR) were also evaluated, as well as two parameters, ETRmax and initial slop, were derived from the curve: (1) ETRmax, (2) initial slope (alpha parameter). The two parameters were related to the degree of desiccation (RWC decdlining from 100 to 0%). It was found that NPQ induction curves and the parameters derived from them were sensitive to dehydration and may be used as markers for dehydration-induced changes in photo- system II functioning of desiccating Ch. aciphyllum. The activation of non-photochemical quenching during desiccatin and the underlying mechanisms are discussed.

Název v anglickém jazyce

Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

Popis výsledku anglicky

We investigated the relationship between relative water content (RWC) of Antarctic moss Chorisodontium aciphyllum and several chlorophyll fluorescence parameters evaluating primary photochemical processes of photosynthesis. During the gradual dehydration of Ch. aciphyllum from fully wet (RWC=100%) to dry (RWC=0%) state, progression of NPQ (non-photochemical quenching) induction curves were recorded, the maximum NPQ (NPQ(max)) attained at the end of illumination period (10 min.), and NPQ relaxation in dark were all analysed. Induction curves of photosynthetic electron transport rate (ETR) were also evaluated, as well as two parameters, ETRmax and initial slop, were derived from the curve: (1) ETRmax, (2) initial slope (alpha parameter). The two parameters were related to the degree of desiccation (RWC decdlining from 100 to 0%). It was found that NPQ induction curves and the parameters derived from them were sensitive to dehydration and may be used as markers for dehydration-induced changes in photo- system II functioning of desiccating Ch. aciphyllum. The activation of non-photochemical quenching during desiccatin and the underlying mechanisms are discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA22-29315S" target="_blank" >GA22-29315S: ExtremeAdapt - nedestruktivní sledování biomolekulární odezvy pouštních extremofilů na polyextrémní prostředí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Czech Polar Reports

ISSN

1805-0689

e-ISSN

1805-0697

Svazek periodika

14

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

001325526900001

EID výsledku v databázi Scopus

2-s2.0-85206188826