Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune
In this study, we investigated the relationship between relative water content (RWC) of N. commune colonies recorded during gradual dehydration and (i) normalized difference vegetation index (NDVI), (ii) photochemical reflectance index (PRI), and (iii) primary photochemical processes of photosynthes...
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ftmasarykis:oai:is.muni.cz:1354831 2023-10-25T01:29:50+02:00 Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune Barták Miloš Hazdrová Jana Skácelová Kateřina Hájek Josef 2016 9 https://is.muni.cz/publication/1354831 https://doi.org/10.5817/CPR2016-1-9 eng eng Masarykova univerzita https://is.muni.cz/publication/1354831 info:eu-repo/semantics/restrictedAccess Czech Polar Reports PRI NDVI Antarctic James Ross Island saturation effect colony Antarktida ostrovJames Rosse saturační efekt kolonie info:eu-repo/semantics/article J 2016 ftmasarykis https://doi.org/10.5817/CPR2016-1-9 2023-09-28T15:13:50Z In this study, we investigated the relationship between relative water content (RWC) of N. commune colonies recorded during gradual dehydration and (i) normalized difference vegetation index (NDVI), (ii) photochemical reflectance index (PRI), and (iii) primary photochemical processes of photosynthesis, effective quantum yield of photosynthetic processes (PhiPSII) in photosystem II particular. PRI increased from -0.05 to 0.02 with RWC decrease from 100% (full hydration) to 0% (dry state). NDVI showed somewhat curvilinear relationship with desiccation with minimum value of 0.25 found at 10% RWC. Negative effect of suprasaturation of N. commune colony with water on effective quantum yield (PhiPSII) was found at RWC range 80-100%. At the RWC range, PhiPSII reached only 50 % of maximum found at RWC of 30%. In general, desiccation-response curve of showed polyphasic character with three main phases (phase I – constant PhiPSII values, phase II – an increase with desiccation at RWC 80-30%, and phase III – sigmoidal decrease with desiccation at RWC 0-30%). Práce je zaměřena na analýzu spektrálních indexů PRI a NDVI, v souvislosti s dehydrací kolonie sinice Nostoc commune. Souběžně s indexy spektrální reflektance byly měřeny a analyzovávy fotosyntetické parametry fluorescence chlorofylu, zejména efektivní kvantový výtěžek fotosyntetických procesů ve fotosystému II (PS II) In this study, we investigated the relationship between relative water content (RWC) of N. commune colonies recorded during gradual dehydration and (i) normalized difference vegetation index (NDVI), (ii) photochemical reflectance index (PRI), and (iii) primary photochemical processes of photosynthesis, effective quantum yield of photosynthetic processes (PhiPSII) in photosystem II particular. PRI increased from -0.05 to 0.02 with RWC decrease from 100% (full hydration) to 0% (dry state). NDVI showed somewhat curvilinear relationship with desiccation with minimum value of 0.25 found at 10% RWC. Negative effect of suprasaturation of N. commune colony ... Article in Journal/Newspaper Antarc* Antarctic James Ross Island Ross Island Masaryk University: Open Services of Information System Antarctic Ross Island Rosse ENVELOPE(12.786,12.786,64.897,64.897) Czech Polar Reports 6 1 87 95 |
institution |
Open Polar |
collection |
Masaryk University: Open Services of Information System |
op_collection_id |
ftmasarykis |
language |
English |
topic |
PRI NDVI Antarctic James Ross Island saturation effect colony Antarktida ostrovJames Rosse saturační efekt kolonie |
spellingShingle |
PRI NDVI Antarctic James Ross Island saturation effect colony Antarktida ostrovJames Rosse saturační efekt kolonie Barták Miloš Hazdrová Jana Skácelová Kateřina Hájek Josef Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
topic_facet |
PRI NDVI Antarctic James Ross Island saturation effect colony Antarktida ostrovJames Rosse saturační efekt kolonie |
description |
In this study, we investigated the relationship between relative water content (RWC) of N. commune colonies recorded during gradual dehydration and (i) normalized difference vegetation index (NDVI), (ii) photochemical reflectance index (PRI), and (iii) primary photochemical processes of photosynthesis, effective quantum yield of photosynthetic processes (PhiPSII) in photosystem II particular. PRI increased from -0.05 to 0.02 with RWC decrease from 100% (full hydration) to 0% (dry state). NDVI showed somewhat curvilinear relationship with desiccation with minimum value of 0.25 found at 10% RWC. Negative effect of suprasaturation of N. commune colony with water on effective quantum yield (PhiPSII) was found at RWC range 80-100%. At the RWC range, PhiPSII reached only 50 % of maximum found at RWC of 30%. In general, desiccation-response curve of showed polyphasic character with three main phases (phase I – constant PhiPSII values, phase II – an increase with desiccation at RWC 80-30%, and phase III – sigmoidal decrease with desiccation at RWC 0-30%). Práce je zaměřena na analýzu spektrálních indexů PRI a NDVI, v souvislosti s dehydrací kolonie sinice Nostoc commune. Souběžně s indexy spektrální reflektance byly měřeny a analyzovávy fotosyntetické parametry fluorescence chlorofylu, zejména efektivní kvantový výtěžek fotosyntetických procesů ve fotosystému II (PS II) In this study, we investigated the relationship between relative water content (RWC) of N. commune colonies recorded during gradual dehydration and (i) normalized difference vegetation index (NDVI), (ii) photochemical reflectance index (PRI), and (iii) primary photochemical processes of photosynthesis, effective quantum yield of photosynthetic processes (PhiPSII) in photosystem II particular. PRI increased from -0.05 to 0.02 with RWC decrease from 100% (full hydration) to 0% (dry state). NDVI showed somewhat curvilinear relationship with desiccation with minimum value of 0.25 found at 10% RWC. Negative effect of suprasaturation of N. commune colony ... |
format |
Article in Journal/Newspaper |
author |
Barták Miloš Hazdrová Jana Skácelová Kateřina Hájek Josef |
author_facet |
Barták Miloš Hazdrová Jana Skácelová Kateřina Hájek Josef |
author_sort |
Barták Miloš |
title |
Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
title_short |
Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
title_full |
Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
title_fullStr |
Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
title_full_unstemmed |
Dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in Antarctic Nostoc commune |
title_sort |
dehydration-induced responses of primary photosynthetic processes and spectral reflectance indices in antarctic nostoc commune |
publisher |
Masarykova univerzita |
publishDate |
2016 |
url |
https://is.muni.cz/publication/1354831 https://doi.org/10.5817/CPR2016-1-9 |
long_lat |
ENVELOPE(12.786,12.786,64.897,64.897) |
geographic |
Antarctic Ross Island Rosse |
geographic_facet |
Antarctic Ross Island Rosse |
genre |
Antarc* Antarctic James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic James Ross Island Ross Island |
op_source |
Czech Polar Reports |
op_relation |
https://is.muni.cz/publication/1354831 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5817/CPR2016-1-9 |
container_title |
Czech Polar Reports |
container_volume |
6 |
container_issue |
1 |
container_start_page |
87 |
op_container_end_page |
95 |
_version_ |
1780734902018244608 |