Diurnal patterns in Scots pine stem oleoresin pressure in a boreal forest

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Coniferous tree stems contain large amounts of oleoresin under positive pressure in the resin ducts. Studies in North-American pines indicated that the stem oleoresin exudation pressure (OEP) correlates negatively with transpiration rate and soil water content. However, it is not known how the OEP changes affect the emissions of volatile vapours from the trees. We measured the OEP, xylem diameter changes indicating changes in xylem water potential and monoterpene emissions under field conditions in mature Scots pine (Pinus sylvestris L.) trees in southern Finland. Contrary to earlier reports, the diurnal OEP changes were positively correlated with temperature and transpiration rate. OEP was lowest at the top part of the stem, where water potentials were also more negative, and often closely linked to ambient temperature and stem monoterpene emissions. However, occasionally OEP was affected by sudden changes in vapour pressure deficit (VPD), indicating the importance of xylem water potential on OEP as well. We conclude that the oleoresin storage pools in tree stems are in a dynamic relationship with ambient temperature and xylem water potential, and that the canopy monoterpene emission rates may therefore be also regulated by whole tree processes and not only by the conditions prevailing in the upper canopy.
Original languageEnglish
JournalPlant, Cell and Environment
Volume39
Issue number3
Pages (from-to)527-538
Number of pages12
ISSN0140-7791
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1171 Geosciences
  • 1172 Environmental sciences
  • 4112 Forestry
  • 1183 Plant biology, microbiology, virology

Cite this

@article{6bde5a5968e340f0a4064dc6195d7679,
title = "Diurnal patterns in Scots pine stem oleoresin pressure in a boreal forest",
abstract = "Coniferous tree stems contain large amounts of oleoresin under positive pressure in the resin ducts. Studies in North-American pines indicated that the stem oleoresin exudation pressure (OEP) correlates negatively with transpiration rate and soil water content. However, it is not known how the OEP changes affect the emissions of volatile vapours from the trees. We measured the OEP, xylem diameter changes indicating changes in xylem water potential and monoterpene emissions under field conditions in mature Scots pine (Pinus sylvestris L.) trees in southern Finland. Contrary to earlier reports, the diurnal OEP changes were positively correlated with temperature and transpiration rate. OEP was lowest at the top part of the stem, where water potentials were also more negative, and often closely linked to ambient temperature and stem monoterpene emissions. However, occasionally OEP was affected by sudden changes in vapour pressure deficit (VPD), indicating the importance of xylem water potential on OEP as well. We conclude that the oleoresin storage pools in tree stems are in a dynamic relationship with ambient temperature and xylem water potential, and that the canopy monoterpene emission rates may therefore be also regulated by whole tree processes and not only by the conditions prevailing in the upper canopy.",
keywords = "1171 Geosciences, 1172 Environmental sciences, 4112 Forestry, 1183 Plant biology, microbiology, virology",
author = "Rissanen, {Kaisa Alina} and H{\"o}ltt{\"a}, {Teemu Samuli} and Vanhatalo, {Anni Marketta} and Aalto, {Juho Antton} and Nikinmaa, {Eero Heikki} and Rita, {Hannu Juhani} and B{\"a}ck, {Jaana Kaarina}",
year = "2016",
doi = "10.1111/pce.12637",
language = "English",
volume = "39",
pages = "527--538",
journal = "Plant, Cell and Environment",
issn = "0140-7791",
publisher = "Wiley",
number = "3",

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TY - JOUR

T1 - Diurnal patterns in Scots pine stem oleoresin pressure in a boreal forest

AU - Rissanen, Kaisa Alina

AU - Hölttä, Teemu Samuli

AU - Vanhatalo, Anni Marketta

AU - Aalto, Juho Antton

AU - Nikinmaa, Eero Heikki

AU - Rita, Hannu Juhani

AU - Bäck, Jaana Kaarina

PY - 2016

Y1 - 2016

N2 - Coniferous tree stems contain large amounts of oleoresin under positive pressure in the resin ducts. Studies in North-American pines indicated that the stem oleoresin exudation pressure (OEP) correlates negatively with transpiration rate and soil water content. However, it is not known how the OEP changes affect the emissions of volatile vapours from the trees. We measured the OEP, xylem diameter changes indicating changes in xylem water potential and monoterpene emissions under field conditions in mature Scots pine (Pinus sylvestris L.) trees in southern Finland. Contrary to earlier reports, the diurnal OEP changes were positively correlated with temperature and transpiration rate. OEP was lowest at the top part of the stem, where water potentials were also more negative, and often closely linked to ambient temperature and stem monoterpene emissions. However, occasionally OEP was affected by sudden changes in vapour pressure deficit (VPD), indicating the importance of xylem water potential on OEP as well. We conclude that the oleoresin storage pools in tree stems are in a dynamic relationship with ambient temperature and xylem water potential, and that the canopy monoterpene emission rates may therefore be also regulated by whole tree processes and not only by the conditions prevailing in the upper canopy.

AB - Coniferous tree stems contain large amounts of oleoresin under positive pressure in the resin ducts. Studies in North-American pines indicated that the stem oleoresin exudation pressure (OEP) correlates negatively with transpiration rate and soil water content. However, it is not known how the OEP changes affect the emissions of volatile vapours from the trees. We measured the OEP, xylem diameter changes indicating changes in xylem water potential and monoterpene emissions under field conditions in mature Scots pine (Pinus sylvestris L.) trees in southern Finland. Contrary to earlier reports, the diurnal OEP changes were positively correlated with temperature and transpiration rate. OEP was lowest at the top part of the stem, where water potentials were also more negative, and often closely linked to ambient temperature and stem monoterpene emissions. However, occasionally OEP was affected by sudden changes in vapour pressure deficit (VPD), indicating the importance of xylem water potential on OEP as well. We conclude that the oleoresin storage pools in tree stems are in a dynamic relationship with ambient temperature and xylem water potential, and that the canopy monoterpene emission rates may therefore be also regulated by whole tree processes and not only by the conditions prevailing in the upper canopy.

KW - 1171 Geosciences

KW - 1172 Environmental sciences

KW - 4112 Forestry

KW - 1183 Plant biology, microbiology, virology

U2 - 10.1111/pce.12637

DO - 10.1111/pce.12637

M3 - Article

VL - 39

SP - 527

EP - 538

JO - Plant, Cell and Environment

JF - Plant, Cell and Environment

SN - 0140-7791

IS - 3

ER -