| Title: | "Stem emissions of monoterpenes, acetaldehyde and methanol from Scots pine (Pinus sylvestris L.) affected by tree-water relations and cambial growth" |
| Author(s): | Rissanen K; Vanhatalo A; Salmon Y; Back J; Holtta T; |
| Address: | "Institute for Atmospheric and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland. Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "Tree stems are an overlooked source of volatile organic compounds (VOCs). Their contribution to ecosystem processes and total VOC fluxes is not well studied, and assessing it requires better understanding of stem emission dynamics and their driving processes. To gain more mechanistic insight into stem emission patterns, we measured monoterpene, methanol and acetaldehyde emissions from the stems of mature Scots pines (Pinus sylvestris L.) in a boreal forest over three summers. We analysed the effects of temperature, soil water content, tree water status, transpiration and growth on the VOC emissions and used generalized linear models to test their relative importance in explaining the emissions. We show that Scots pine stems are considerable sources of monoterpenes, methanol and acetaldehyde, and their emissions are strongly regulated by temperature. However, even small changes in water availability affected the emission potentials: increased soil water content increased the monoterpene emissions within a day, whereas acetaldehyde and methanol emissions responded within 2-4 days. This lag corresponded to their transport time in the xylem sap from the roots to the stem. Moreover, the emissions of monoterpenes, methanol and acetaldehyde were influenced by the cambial growth rate of the stem with 6-10-day lags" |
| Keywords: | Acetaldehyde/*metabolism Cambium/growth & development/*metabolism/physiology Methanol/*metabolism Monoterpenes/*metabolism Pinus sylvestris/growth & development/*metabolism/physiology Plant Stems/*metabolism Water/metabolism Scots pine Voc acetaldehyde me; |
| Notes: | "MedlineRissanen, Kaisa Vanhatalo, Anni Salmon, Yann Back, Jaana Holtta, Teemu eng Research Support, Non-U.S. Gov't 2020/04/27 Plant Cell Environ. 2020 Jul; 43(7):1751-1765. doi: 10.1111/pce.13778. Epub 2020 May 28" |
