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Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic

Subarctic vegetation is composed of mountain birch [Betula pubescens ssp. czerepanovii (MB)] forests with shrubs and other species growing in the understorey. The effects of the presence and density of one understorey shrub, Rhododendron tomentosum (RT), on the volatile emissions of MB, were investi...

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Autores principales: Mofikoya, Adedayo O., Miura, Kazumi, Ghimire, Rajendra P., Blande, James D., Kivimäenpää, Minna, Holopainen, Toini, Holopainen, Jarmo K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6125604/
https://www.ncbi.nlm.nih.gov/pubmed/30185795
http://dx.doi.org/10.1038/s41598-018-31084-3
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author Mofikoya, Adedayo O.
Miura, Kazumi
Ghimire, Rajendra P.
Blande, James D.
Kivimäenpää, Minna
Holopainen, Toini
Holopainen, Jarmo K.
author_facet Mofikoya, Adedayo O.
Miura, Kazumi
Ghimire, Rajendra P.
Blande, James D.
Kivimäenpää, Minna
Holopainen, Toini
Holopainen, Jarmo K.
author_sort Mofikoya, Adedayo O.
collection PubMed
description Subarctic vegetation is composed of mountain birch [Betula pubescens ssp. czerepanovii (MB)] forests with shrubs and other species growing in the understorey. The effects of the presence and density of one understorey shrub, Rhododendron tomentosum (RT), on the volatile emissions of MB, were investigated in a Finnish subarctic forest site in early and late growing season. Only MB trees with an RT-understorey emitted the RT-specific sesquiterpenoids, palustrol, ledol and aromadendrene. Myrcene, which is the most abundant RT-monoterpene was also emitted in higher quantities by MB trees with an RT-understorey. The effect of RT understorey density on the recovery of RT compounds from MB branches was evident only during the late season when sampling temperature, as well as RT emissions, were higher. MB sesquiterpene and total emission rates decreased from early season to late season, while monoterpene emission rate increased. Both RT and MB terpenoid emission rates were linked to density of foliar glandular trichomes, which deteriorated over the season on MB leaves and emerged with new leaves in the late season in RT. We show that sesquiterpene and monoterpene compounds emitted by understorey vegetation are adsorbed and re-released by MB, strongly affecting the MB volatile emission profile.
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spelling pubmed-61256042018-09-10 Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic Mofikoya, Adedayo O. Miura, Kazumi Ghimire, Rajendra P. Blande, James D. Kivimäenpää, Minna Holopainen, Toini Holopainen, Jarmo K. Sci Rep Article Subarctic vegetation is composed of mountain birch [Betula pubescens ssp. czerepanovii (MB)] forests with shrubs and other species growing in the understorey. The effects of the presence and density of one understorey shrub, Rhododendron tomentosum (RT), on the volatile emissions of MB, were investigated in a Finnish subarctic forest site in early and late growing season. Only MB trees with an RT-understorey emitted the RT-specific sesquiterpenoids, palustrol, ledol and aromadendrene. Myrcene, which is the most abundant RT-monoterpene was also emitted in higher quantities by MB trees with an RT-understorey. The effect of RT understorey density on the recovery of RT compounds from MB branches was evident only during the late season when sampling temperature, as well as RT emissions, were higher. MB sesquiterpene and total emission rates decreased from early season to late season, while monoterpene emission rate increased. Both RT and MB terpenoid emission rates were linked to density of foliar glandular trichomes, which deteriorated over the season on MB leaves and emerged with new leaves in the late season in RT. We show that sesquiterpene and monoterpene compounds emitted by understorey vegetation are adsorbed and re-released by MB, strongly affecting the MB volatile emission profile. Nature Publishing Group UK 2018-09-05 /pmc/articles/PMC6125604/ /pubmed/30185795 http://dx.doi.org/10.1038/s41598-018-31084-3 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Mofikoya, Adedayo O.
Miura, Kazumi
Ghimire, Rajendra P.
Blande, James D.
Kivimäenpää, Minna
Holopainen, Toini
Holopainen, Jarmo K.
Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title_full Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title_fullStr Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title_full_unstemmed Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title_short Understorey Rhododendron tomentosum and Leaf Trichome Density Affect Mountain Birch VOC Emissions in the Subarctic
title_sort understorey rhododendron tomentosum and leaf trichome density affect mountain birch voc emissions in the subarctic
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6125604/
https://www.ncbi.nlm.nih.gov/pubmed/30185795
http://dx.doi.org/10.1038/s41598-018-31084-3
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