Volatile organic compound emission in tundra shrubs – Dependence on species characteristics and the near-surface environment
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Volatile organic compound emission in tundra shrubs – Dependence on species characteristics and the near-surface environment. / Simin, Tihomir; Tang, Jing; Holst, Thomas; Rinnan, Riikka.
I: Environmental and Experimental Botany, Bind 184, 104387, 2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Volatile organic compound emission in tundra shrubs – Dependence on species characteristics and the near-surface environment
AU - Simin, Tihomir
AU - Tang, Jing
AU - Holst, Thomas
AU - Rinnan, Riikka
N1 - CENPERMOA[2021]
PY - 2021
Y1 - 2021
N2 - Temperature is one of the key abiotic factors during the life of plants, especially in the Arctic region which is currently experiencing rapid climate change. We evaluated plant traits and environmental variables determining leaf temperature in tundra shrubs and volatile organic compound (VOC) emissions with field measurements on deciduous tundra shrubs, Salix myrsinites and Betula nana, and evergreen Cassiope tetragona and Rhododendron lapponicum. Higher leaf-to-air temperature difference was observed in evergreen, compared to deciduous shrubs. Evergreen shrubs also showed continuously increasing photosynthesis with increasing temperature, suggesting high thermal tolerance. For the deciduous species, the optimum temperature for net photosynthesis was between our measurement temperatures of 24 °C and 38 °C. Air temperature and vapor pressure deficit were the most important variables influencing leaf temperature and VOC emissions in all the studied plants, along with stomatal density and specific leaf area in the deciduous shrubs. Using climate data and emission factors from our measurements, we modelled total seasonal tundra shrub VOC emissions of 0.3–2.3 g m−2 over the main growing season. Our results showed higher-than-expected temperature optima for photosynthesis and VOC emission and demonstrated the relative importance of plant traits and local environments in determining leaf temperature and VOC emissions in a subarctic tundra.
AB - Temperature is one of the key abiotic factors during the life of plants, especially in the Arctic region which is currently experiencing rapid climate change. We evaluated plant traits and environmental variables determining leaf temperature in tundra shrubs and volatile organic compound (VOC) emissions with field measurements on deciduous tundra shrubs, Salix myrsinites and Betula nana, and evergreen Cassiope tetragona and Rhododendron lapponicum. Higher leaf-to-air temperature difference was observed in evergreen, compared to deciduous shrubs. Evergreen shrubs also showed continuously increasing photosynthesis with increasing temperature, suggesting high thermal tolerance. For the deciduous species, the optimum temperature for net photosynthesis was between our measurement temperatures of 24 °C and 38 °C. Air temperature and vapor pressure deficit were the most important variables influencing leaf temperature and VOC emissions in all the studied plants, along with stomatal density and specific leaf area in the deciduous shrubs. Using climate data and emission factors from our measurements, we modelled total seasonal tundra shrub VOC emissions of 0.3–2.3 g m−2 over the main growing season. Our results showed higher-than-expected temperature optima for photosynthesis and VOC emission and demonstrated the relative importance of plant traits and local environments in determining leaf temperature and VOC emissions in a subarctic tundra.
KW - Betula nana
KW - Cassiope tetragona
KW - Leaf temperature
KW - MEGAN
KW - Photosynthesis
KW - Rhododendron lapponicum
KW - Salix myrsinites
KW - Tundra
KW - VOC
U2 - 10.1016/j.envexpbot.2021.104387
DO - 10.1016/j.envexpbot.2021.104387
M3 - Journal article
C2 - 33814646
AN - SCOPUS:85099614939
VL - 184
JO - Environmental and Experimental Botany
JF - Environmental and Experimental Botany
SN - 0098-8472
M1 - 104387
ER -
ID: 257282492