Research of respiration of twigs and stems of the Karelian birch and Silver birch
Stem respiration of two forms of Betula pendula Roth [Silver birch ( B. pendula var. pendula ) and Karelian birch ( B. pendula var. carelica )] was investigated. 5-6-years old trees and 2-3-years old seedlings, grown in pots, were studied. Among objects of Karelian birch, there were specimens both w...
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Karelian Research Centre of the Russian Academy of Sciences
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ftdoajarticles:oai:doaj.org/article:613005b4556448d8b35955d192f4c23f 2023-05-15T17:01:19+02:00 Research of respiration of twigs and stems of the Karelian birch and Silver birch Viktor Bolondinsky Lyudmila Vilikainen 2016-01-01T00:00:00Z https://doi.org/10.17076/eb249 https://doaj.org/article/613005b4556448d8b35955d192f4c23f EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/biology/article/view/249 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb249 https://doaj.org/article/613005b4556448d8b35955d192f4c23f Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 12, Pp 66-79 (2016) betula l karelian birch co 2 gas exchange stem respiration temperature dependence bark thickness Science Q article 2016 ftdoajarticles https://doi.org/10.17076/eb249 2022-12-31T10:01:36Z Stem respiration of two forms of Betula pendula Roth [Silver birch ( B. pendula var. pendula ) and Karelian birch ( B. pendula var. carelica )] was investigated. 5-6-years old trees and 2-3-years old seedlings, grown in pots, were studied. Among objects of Karelian birch, there were specimens both without visible deviations from normal growth and with structural anomalies of stems. Along with the relationship with environmental factors (mainly temperature), stem respiration rate was strongly related with cambial activity and stem width growth. Before cambial growth (in June) mean respiration rates of twigs and stems in seedlings with diameters 10-14 mm were 5,3 and 4,6 μmol·m -2 ·s -1 in Silver birch and Karelian birch respectively, during cambial growth (late June – first half of August) – 12,3 and 17,6 μ mol·m -2 ·s -1 , and during period of growth attenuation (second half of August – early September) – 2,6 and 3,1 μmol·m -2 ·s -1 . Maximal respiration rates (20 μmol·m -2 ·s -1 and 28 μmol·m -2 ·s -1 for Silver birch and Karelian birch respectively) registered in late July, were higher (in absolute value) than net CO 2 gas exchange of leaves. In about 30% of measurements, respiration rate in Karelian birch was more than two times higher than in Silver birch. Higher respiration rate in Karelian birch than in Silver birch is mostly related with higher metabolic activity in cambial zone and more amount of live respiring tissues per unit of a stem length in stems of the same width in this two forms of birch. Measurements have shown that thickness and volume of the bark in Karelian birch were higher by 16-20% than in Silver birch. There were no significant differences in stem respiration of 6-years old Karelian birch trees, which already had visible thickenings of stems, and seedlings without visible signs of structural anomalies of stems. In rare cases there were higher stem respiration rate in Silver birch than in Karelian birch. The causes of this phenomenon are analyzed. Article in Journal/Newspaper karelian Directory of Open Access Journals: DOAJ Articles Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 12 66 |
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betula l karelian birch co 2 gas exchange stem respiration temperature dependence bark thickness Science Q |
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betula l karelian birch co 2 gas exchange stem respiration temperature dependence bark thickness Science Q Viktor Bolondinsky Lyudmila Vilikainen Research of respiration of twigs and stems of the Karelian birch and Silver birch |
topic_facet |
betula l karelian birch co 2 gas exchange stem respiration temperature dependence bark thickness Science Q |
description |
Stem respiration of two forms of Betula pendula Roth [Silver birch ( B. pendula var. pendula ) and Karelian birch ( B. pendula var. carelica )] was investigated. 5-6-years old trees and 2-3-years old seedlings, grown in pots, were studied. Among objects of Karelian birch, there were specimens both without visible deviations from normal growth and with structural anomalies of stems. Along with the relationship with environmental factors (mainly temperature), stem respiration rate was strongly related with cambial activity and stem width growth. Before cambial growth (in June) mean respiration rates of twigs and stems in seedlings with diameters 10-14 mm were 5,3 and 4,6 μmol·m -2 ·s -1 in Silver birch and Karelian birch respectively, during cambial growth (late June – first half of August) – 12,3 and 17,6 μ mol·m -2 ·s -1 , and during period of growth attenuation (second half of August – early September) – 2,6 and 3,1 μmol·m -2 ·s -1 . Maximal respiration rates (20 μmol·m -2 ·s -1 and 28 μmol·m -2 ·s -1 for Silver birch and Karelian birch respectively) registered in late July, were higher (in absolute value) than net CO 2 gas exchange of leaves. In about 30% of measurements, respiration rate in Karelian birch was more than two times higher than in Silver birch. Higher respiration rate in Karelian birch than in Silver birch is mostly related with higher metabolic activity in cambial zone and more amount of live respiring tissues per unit of a stem length in stems of the same width in this two forms of birch. Measurements have shown that thickness and volume of the bark in Karelian birch were higher by 16-20% than in Silver birch. There were no significant differences in stem respiration of 6-years old Karelian birch trees, which already had visible thickenings of stems, and seedlings without visible signs of structural anomalies of stems. In rare cases there were higher stem respiration rate in Silver birch than in Karelian birch. The causes of this phenomenon are analyzed. |
format |
Article in Journal/Newspaper |
author |
Viktor Bolondinsky Lyudmila Vilikainen |
author_facet |
Viktor Bolondinsky Lyudmila Vilikainen |
author_sort |
Viktor Bolondinsky |
title |
Research of respiration of twigs and stems of the Karelian birch and Silver birch |
title_short |
Research of respiration of twigs and stems of the Karelian birch and Silver birch |
title_full |
Research of respiration of twigs and stems of the Karelian birch and Silver birch |
title_fullStr |
Research of respiration of twigs and stems of the Karelian birch and Silver birch |
title_full_unstemmed |
Research of respiration of twigs and stems of the Karelian birch and Silver birch |
title_sort |
research of respiration of twigs and stems of the karelian birch and silver birch |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2016 |
url |
https://doi.org/10.17076/eb249 https://doaj.org/article/613005b4556448d8b35955d192f4c23f |
genre |
karelian |
genre_facet |
karelian |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 12, Pp 66-79 (2016) |
op_relation |
http://journals.krc.karelia.ru/index.php/biology/article/view/249 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb249 https://doaj.org/article/613005b4556448d8b35955d192f4c23f |
op_doi |
https://doi.org/10.17076/eb249 |
container_title |
Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
container_issue |
12 |
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66 |
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1766054421406416896 |