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Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves
Autumn senescence of deciduous trees is characterized by chlorophyll degradation and flavonoid synthesis. In the present study, chlorophyll and flavonol contents were measured every morning and evening during the whole autumn with a non-destructive method from individual leaves of Sorbus aucuparia,...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6007487/ https://www.ncbi.nlm.nih.gov/pubmed/29977486 http://dx.doi.org/10.1093/aobpla/ply028 |
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author | Mattila, Heta Valev, Dimitar Havurinne, Vesa Khorobrykh, Sergey Virtanen, Olli Antinluoma, Mikko Mishra, Kumud B Tyystjärvi, Esa |
author_facet | Mattila, Heta Valev, Dimitar Havurinne, Vesa Khorobrykh, Sergey Virtanen, Olli Antinluoma, Mikko Mishra, Kumud B Tyystjärvi, Esa |
author_sort | Mattila, Heta |
collection | PubMed |
description | Autumn senescence of deciduous trees is characterized by chlorophyll degradation and flavonoid synthesis. In the present study, chlorophyll and flavonol contents were measured every morning and evening during the whole autumn with a non-destructive method from individual leaves of Sorbus aucuparia, Acer platanoides, Betula pendula and Prunus padus. In most of the studied trees, the chlorophyll content of each individual leaf remained constant until a phase of rapid degradation commenced. The fast phase lasted only ~1 week and ended with abscission. In S. aucuparia, contrary to the other species, the chlorophyll content of leaflets slowly but steadily decreased during the whole autumn, but rapid chlorophyll degradation commenced only prior to leaflet abscission also in this species. An increase in flavonols commonly accompanied the rapid degradation of chlorophyll. The results may suggest that each individual tree leaf retains its photosynthetic activity, reflected by a high chlorophyll content, until a rapid phase of chlorophyll degradation and flavonoid synthesis begins. Therefore, in studies of autumn senescence, leaves whose chlorophyll content is decreasing and leaves with summertime chlorophyll content (i.e. the leaves that have not yet started to degrade chlorophyll) should be treated separately. |
format | Online Article Text |
id | pubmed-6007487 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-60074872018-07-05 Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves Mattila, Heta Valev, Dimitar Havurinne, Vesa Khorobrykh, Sergey Virtanen, Olli Antinluoma, Mikko Mishra, Kumud B Tyystjärvi, Esa AoB Plants Research Article Autumn senescence of deciduous trees is characterized by chlorophyll degradation and flavonoid synthesis. In the present study, chlorophyll and flavonol contents were measured every morning and evening during the whole autumn with a non-destructive method from individual leaves of Sorbus aucuparia, Acer platanoides, Betula pendula and Prunus padus. In most of the studied trees, the chlorophyll content of each individual leaf remained constant until a phase of rapid degradation commenced. The fast phase lasted only ~1 week and ended with abscission. In S. aucuparia, contrary to the other species, the chlorophyll content of leaflets slowly but steadily decreased during the whole autumn, but rapid chlorophyll degradation commenced only prior to leaflet abscission also in this species. An increase in flavonols commonly accompanied the rapid degradation of chlorophyll. The results may suggest that each individual tree leaf retains its photosynthetic activity, reflected by a high chlorophyll content, until a rapid phase of chlorophyll degradation and flavonoid synthesis begins. Therefore, in studies of autumn senescence, leaves whose chlorophyll content is decreasing and leaves with summertime chlorophyll content (i.e. the leaves that have not yet started to degrade chlorophyll) should be treated separately. Oxford University Press 2018-05-04 /pmc/articles/PMC6007487/ /pubmed/29977486 http://dx.doi.org/10.1093/aobpla/ply028 Text en © The Author(s) 2018. Published by Oxford University Press on behalf of the Annals of Botany Company. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Mattila, Heta Valev, Dimitar Havurinne, Vesa Khorobrykh, Sergey Virtanen, Olli Antinluoma, Mikko Mishra, Kumud B Tyystjärvi, Esa Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title | Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title_full | Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title_fullStr | Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title_full_unstemmed | Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title_short | Degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
title_sort | degradation of chlorophyll and synthesis of flavonols during autumn senescence—the story told by individual leaves |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6007487/ https://www.ncbi.nlm.nih.gov/pubmed/29977486 http://dx.doi.org/10.1093/aobpla/ply028 |
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