Ultraviolet radiation accelerates photodegradation under controlled conditions but slows the decomposition of senescent leaves from forest stands in southern Finland
| العنوان: | Ultraviolet radiation accelerates photodegradation under controlled conditions but slows the decomposition of senescent leaves from forest stands in southern Finland |
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| المؤلفون: | Twinkle Solanki, T. Matthew Robson, Jevgenija Ņečajeva, Santa Neimane, Line Nybakken, Matthieu Chauvat, Alan G. Jones, Marta Pieristè, Estelle Forey |
| المساهمون: | Organismal and Evolutionary Biology [Helsinki], Viikki Plant Science Centre (ViPS), Faculty of Biological and Environmental Sciences [Helsinki], University of Helsinki-University of Helsinki-Faculty of Biological and Environmental Sciences [Helsinki], University of Helsinki-University of Helsinki, University of Helsinki, Faculty of Environmental Sciences and Natural Resource Management, Forest Systems, Scion [New Zealand], Étude et compréhension de la biodiversité (ECODIV), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Department of plant physiology, Charles University [Prague] (CU), Canopy Spectral Ecology and Ecophysiology, Organismal and Evolutionary Biology Research Programme |
| المصدر: | Plant Physiology and Biochemistry Plant Physiology and Biochemistry, Elsevier, 2020, 146, pp.42-54. ⟨10.1016/j.plaphy.2019.11.005⟩ |
| بيانات النشر: | HAL CCSD, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Canopy, Ultraviolet Rays, Physiology, UV-B RADIATION, Plant Science, Forests, ANTHOCYANINS, 01 natural sciences, UV radiation, BOREAL FOREST, 03 medical and health sciences, chemistry.chemical_compound, Fagus sylvatica, Photodegradation, Genetics, Ecosystem, Finland, ComputingMilieux_MISCELLANEOUS, 11832 Microbiology and virology, Flavonoids, Sunlight, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, 4112 Forestry, Photolysis, biology, Chemistry, TEMPERATE, PLANT LITTER, Picea abies, 15. Life on land, Plant litter, biology.organism_classification, Phenolic compounds, Understorey light environment, SODANKYLA, Plant Leaves, Horticulture, LIGHT, 030104 developmental biology, 13. Climate action, Betula pendula, Chlorophyll, PATTERNS, 1182 Biochemistry, cell and molecular biology, LEAF-LITTER DECOMPOSITION, 010606 plant biology & botany |
| الوصف: | Depending on the environment, sunlight can positively or negatively affect litter decomposition, through the ensemble of direct and indirect processes constituting photodegradation. Which of these processes predominate depends on the ecosystem studied and on the spectral composition of sunlight received. To examine the relevance of photodegradation for litter decomposition in forest understoreys, we filtered ultraviolet radiation (UV) and blue light from leaves of Fagus sylvatica and Bettda pendula at two different stages of senescence in both a controlled-environment experiment and outdoors in four different forest stands (Picea abies, Pagus sylvatica, Acer platanoides, Betula pendula). Controlling for leaf orientation and initial differences in leaf chlorophyll and flavonol concentrations; we measured mass loss at the end of each experiment and characterised the phenolic profile of the leaf litter following photodegradation. In most forest stands, less mass was lost from decomposing leaves that received solar UV radiation compared with those under UV-attenuating filters, while in the controlled environment UV-A radiation either slightly accelerated or had no significant effect on photodegradation, according to species identity. Only a few individual phenolic compounds were affected by our different filter treatments, but photodegradation did affect the phenolic profile. We can conclude that photodegradation has a small stand- and species-specific effect on the decomposition of surface leaf litter in forest understoreys during the winter following leaf fall in southern Finland. Photodegradation was wavelength-dependent and modulated by the canopy species filtering sunlight and likely creating different combinations of spectral composition, moisture, temperature and snowpack characteristics. |
| اللغة: | English |
| تدمد: | 0981-9428 |
| DOI: | 10.1016/j.plaphy.2019.11.005⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::614186794e71f46e183f890a783cfd0d https://hal.archives-ouvertes.fr/hal-02437809 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....614186794e71f46e183f890a783cfd0d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 09819428 |
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| DOI: | 10.1016/j.plaphy.2019.11.005⟩ |