Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation

Result code in 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>
Alternative codes found
RIV/00216224:14310/24:00137937
Result on the web
<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>

Result language
angličtina
Original language name
Photoprotective mechanisms activated in Antarctic moss Chorisodontium aciphyllum during desiccation
Original language description
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.
Czech name
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Czech description
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Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)

Project
<a href="/en/project/GA22-29315S" target="_blank" >GA22-29315S: ExtremeAdapt – nondestructive monitoring of biomolecular response of desert extremophiles to the polyextreme environment</a>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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