Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation
Abstract A study was made of methanol-extractable UV-B-absorbing pigments under enhanced UV-B treatment. UV-B-absorbing pigments in two common ectohydric mosses showed seasonal variation during the summer months. Pigment contents were highest in June, decreased in July, and thereafter remained uncha...
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crcambridgeupr:10.1017/s0032247400017733 2024-03-03T08:48:20+00:00 Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation Taipale, Tiia Huttunen, Satu 2002 http://dx.doi.org/10.1017/s0032247400017733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400017733 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 38, issue 206, page 211-218 ISSN 0032-2474 1475-3057 General Earth and Planetary Sciences Ecology Geography, Planning and Development journal-article 2002 crcambridgeupr https://doi.org/10.1017/s0032247400017733 2024-02-08T08:35:05Z Abstract A study was made of methanol-extractable UV-B-absorbing pigments under enhanced UV-B treatment. UV-B-absorbing pigments in two common ectohydric mosses showed seasonal variation during the summer months. Pigment contents were highest in June, decreased in July, and thereafter remained unchanged until September. In Hylocomium splendens , a significant increase of pigments was observed at the end of the experiment. The intracellular localization of caffeine-stabilized flavonoids was manifested as dark electron-dense deposits in the cell walls and intracellular dark deposits in the cell plasma. The dark deposits in the cell walls of Pleurozium schreberi were located either in the outer part of the cell wall or in the middle lamellae of the wall structures. Hylocomium splendens had a stratified cell-wall structure, in which three dark electron-dense cell layers could be identified. Intracellular deposits were located in different parts of the cell, but electron-dense deposits were observed at the cell margins and in the proximity of the nucleus. Although certain cell ultrastructural disturbances (for example, lipid accumulation, chloroplast disintegration) in moss leaf cells were observed, the short-term UV-B treatment did not increase the intensity of the dark deposits. Article in Journal/Newspaper Polar Record Cambridge University Press Polar Record 38 206 211 218 |
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Cambridge University Press |
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General Earth and Planetary Sciences Ecology Geography, Planning and Development |
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General Earth and Planetary Sciences Ecology Geography, Planning and Development Taipale, Tiia Huttunen, Satu Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
topic_facet |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
description |
Abstract A study was made of methanol-extractable UV-B-absorbing pigments under enhanced UV-B treatment. UV-B-absorbing pigments in two common ectohydric mosses showed seasonal variation during the summer months. Pigment contents were highest in June, decreased in July, and thereafter remained unchanged until September. In Hylocomium splendens , a significant increase of pigments was observed at the end of the experiment. The intracellular localization of caffeine-stabilized flavonoids was manifested as dark electron-dense deposits in the cell walls and intracellular dark deposits in the cell plasma. The dark deposits in the cell walls of Pleurozium schreberi were located either in the outer part of the cell wall or in the middle lamellae of the wall structures. Hylocomium splendens had a stratified cell-wall structure, in which three dark electron-dense cell layers could be identified. Intracellular deposits were located in different parts of the cell, but electron-dense deposits were observed at the cell margins and in the proximity of the nucleus. Although certain cell ultrastructural disturbances (for example, lipid accumulation, chloroplast disintegration) in moss leaf cells were observed, the short-term UV-B treatment did not increase the intensity of the dark deposits. |
format |
Article in Journal/Newspaper |
author |
Taipale, Tiia Huttunen, Satu |
author_facet |
Taipale, Tiia Huttunen, Satu |
author_sort |
Taipale, Tiia |
title |
Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
title_short |
Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
title_full |
Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
title_fullStr |
Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
title_full_unstemmed |
Moss flavonoids and their ultrastructural localization under enhanced UV-B radiation |
title_sort |
moss flavonoids and their ultrastructural localization under enhanced uv-b radiation |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s0032247400017733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400017733 |
genre |
Polar Record |
genre_facet |
Polar Record |
op_source |
Polar Record volume 38, issue 206, page 211-218 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247400017733 |
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38 |
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