Species-specific responses of spectral reflectance and the photosynthetic characteristics in two selected Antarctic mosses to thallus desiccation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00125141" target="_blank" >RIV/00216224:14310/22:00125141 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s11738-021-03339-6" target="_blank" >https://link.springer.com/article/10.1007/s11738-021-03339-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11738-021-03339-6" target="_blank" >10.1007/s11738-021-03339-6</a>
Alternative languages
Result language
angličtina
Original language name
Species-specific responses of spectral reflectance and the photosynthetic characteristics in two selected Antarctic mosses to thallus desiccation
Original language description
Mosses are considered highly resistant against desiccation because they maintain photosynthetic activity even when severely dehydrated. In our study, we investigated changes in the photochemical processes of photosynthesis, as well as the spectral reflectance parameters during controlled rehydration and desiccation in two Antarctic species, i.e. Brachythecium austro-glareosum and Bryum pseudotriquetrum. Changes in primary photochemical processes were evaluated by chlorophyll fluorescence, i.e. slow Kautsky kinetics supplemented with saturation light pulses. In desiccating thalli, an effective quantum yield of photosynthetic processes in PS II (phi(PSII)) remained unchanged within low to moderate desiccation, i.e. with a relative water content (RWC) decrease from fully wet (100%) to semidry (30%). Below 20% RWC, phi(PSII) showed a species-specific decline, as well as steady-state fluorescence (F-S). A half-decrease in phi(PSII) was reached at an RWC of 12.6% (B. austro-glareosum) and 9.8% (B. pseudotriquetrum). Rapid light-response curves showed a strong limitation of photosynthetic electron transport (ETR) at an RWC below 20% in both species. The phi(PSII) and ETR data suggested that both species were desiccation-tolerant and well adapted to harsh Antarctic environments. However, B. pseudotriquetrum was more resistant in a state of severe dehydration (RWC below 20%) than B. austro-glareosum. Spectral reflectance indices responded to desiccation either (a) similarly in the two species (normalised difference vegetation index [NDVI]), (b) with similar trends but different values (modified chlorophyll absorption in reflectance index [MCARI] and greenness index [GI]) and (c) species-specifically (photochemical reflectance index [PRI]).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany
Result continuities
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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Physiologiae Plantarum
ISSN
0137-5881
e-ISSN
1861-1664
Volume of the periodical
44
Issue of the periodical within the volume
1
Country of publishing house
DE - GERMANY
Number of pages
19
Pages from-to
1-19
UT code for WoS article
000723990000001
EID of the result in the Scopus database
2-s2.0-85120155733