Comparative research of photosynthetic processes in selected poikilohydric organisms from Mediterranean and CentralEuropean alpine habitats

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00106430" target="_blank" >RIV/00216224:14310/18:00106430 - isvavai.cz</a>

Alternative codes found

RIV/00094862:_____/19:N0000153

Result on the web

<a href="http://www.sci.muni.cz/CPR/16cislo/Giudici_web.pdf" target="_blank" >http://www.sci.muni.cz/CPR/16cislo/Giudici_web.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5817/CPR2018-2-24" target="_blank" >10.5817/CPR2018-2-24</a>

Result language

angličtina

Original language name

Comparative research of photosynthetic processes in selected poikilohydric organisms from Mediterranean and CentralEuropean alpine habitats

Original language description

Dehydration-induced decrease in photosynthetic activity was investigated in five poikilohydric autotrophs using chlorophyll fluorescence parameters recorded during controlled desiccation. For the study, two representatives of mosses from alpine zone (Rhizomnium punctatum, Rhytidiadelphus squarrosus) of the Jeseníky Mts. (Czech Republic) were used. Other two experimental species were mediterranean habitats liverwort (Pellia endiviifolia) and moss (Palustriella commutata), collected from under Woodwardia radicans canopy in the Nature Reserve Valle delle Ferriere (Italy). The last species was a liverwort (Marchantia polymorpha) collected from lowland site (Brno, Moravia, Czech Republic). We investigated the relationship between relative water content (RWC) and several chlorophyll fluorescence parameters evaluating primary photochemical processes of photosynthesis, such as effective quantum yield of photosynthetic processes in photosystem II (YieldPSII), and non-photochemical quenching (qN). With desiccation from fully wet (RWC = 100%) to dry state (RWC = 0%), YieldPSII exhibited a rapid (R. punctatum) and slow decline of YieldPSII (R. squarrosus, P. endiviifolia, M. polymorpha, and P. commutata). Shapes of dehydration-response curves were species-specific. RWC0.5, i.e. the RWC at which the sample showed half of maximum YieldPSII, reflected the species-specificity. It reached 65% in desiccation sensitive (R. punctatum), 53% and 43% in semi-tolerant (P. commutata and R. squarrosus), 24% and 18% in desiccation-tolerant species (P. endiviifolia and M. polymorpha). In all experimental species, non-photochemical quenching (qN) of absorbed light energy showed high values at RWC = 100% and a slight increase with desiccation. Steady state chlorophyll fluorescence (FS) remained high during desiccation and was not correlated with YieldPSII.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10600 - Biological sciences

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Czech Polar Reports

ISSN

1805-0689

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

13

Pages from-to

286-298

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85062649784