Photoprotective mechanisms activated in Antarctic moss
Chorisodontium aciphyllum during desiccation

J 2024

Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

MISHRA, Kumud Bandhu; Miroslav ROSPUTINSKÝ; Matúš GRIEŠ a Anton PUHOVKIN

Základní údaje

Originální název

Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

Autoři

MISHRA, Kumud Bandhu; Miroslav ROSPUTINSKÝ; Matúš GRIEŠ a Anton PUHOVKIN

Vydání

Czech Polar Reports, Brno, Masaryk University, 2024, 1805-0689

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10611 Plant sciences, botany

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 0.800

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/24:00137937

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

non-photochemical quenching; NPQ induction; Antarctica; Galindez Island; Argentine Islands

Štítky

14314010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 12. 2024 11:05, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

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.

Návaznosti

90248, velká výzkumná infrastruktura

Název: CzeCOS IV

Citovat

MISHRA, Kumud Bandhu; Miroslav ROSPUTINSKÝ; Matúš GRIEŠ a Anton PUHOVKIN. Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation. Czech Polar Reports. Brno: Masaryk University, 2024, roč. 14, č. 1, s. 1-9. ISSN 1805-0689. Dostupné z: https://doi.org/10.5817/CPR2024-1-1.

@article{2459103,
   author = {Mishra, Kumud Bandhu and Rosputinský, Miroslav and Grieš, Matúš and Puhovkin, Anton},
   article_location = {Brno},
   article_number = {1},
   doi = {https://doi.org/10.5817/CPR2024-1-1},
   keywords = {non-photochemical quenching; NPQ induction; Antarctica; Galindez Island; Argentine Islands},
   language = {eng},
   issn = {1805-0689},
   journal = {Czech Polar Reports},
   title = {Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation},
   url = {https://journals.muni.cz/CPR/article/view/39280},
   volume = {14},
   year = {2024}
}

TY  - JOUR
ID  - 2459103
AU  - Mishra, Kumud Bandhu - Rosputinský, Miroslav - Grieš, Matúš - Puhovkin, Anton
PY  - 2024
TI  - Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation
JF  - Czech Polar Reports
VL  - 14
IS  - 1
SP  - 1-9
EP  - 1-9
PB  - Masaryk University
SN  - 18050689
KW  - non-photochemical quenching
KW  - NPQ induction
KW  - Antarctica
KW  - Galindez Island
KW  - Argentine Islands
UR  - https://journals.muni.cz/CPR/article/view/39280
N2  - 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.
ER  -

MISHRA, Kumud Bandhu; Miroslav ROSPUTINSKÝ; Matúš GRIEŠ a Anton PUHOVKIN. Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation. \textit{Czech Polar Reports}. Brno: Masaryk University, 2024, roč.~14, č.~1, s.~1-9. ISSN~1805-0689. Dostupné z: https://doi.org/10.5817/CPR2024-1-1.

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