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Type of publication: Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Miškotyra / Forestry (A004)
Author(s): Marozas, Vitas;Pivoras, Ainis;Augustaitis, Algirdas
Title: Gas exchange characteristics and chlorophyll fluorescence of three dominant boreal tree species during the vegetation season in hemiboreal zone, Lithuania
Is part of: Smart Bio : ICSB 3rd international conference, 02-04 May 2019, Kaunas, Lithuania : abstract book / Vytautas Magnus university. Panevėžys : UAB "Reklamos forma", 2019, Nr. 3
Extent: p. 58-58
Date: 2019
Keywords: Deciduous trees;Climate change;Coniferous trees;Photosynthesis
Abstract: Current climate scenarios predict rising air temperature along with increasing frequency and intensity of summer drought in the Central and Eastern Europe. Severe drought episodes affect physiological processes in trees such as transpiration, photosynthesis and carbon allocation. Understanding gas exchange between plants and the atmosphere is important in woody plant research. The aim of this study was to evaluate differences in gas exchange characteristics and chlorophyll fluorescence of tree species prevailing in Lithuania (Scots pine, Norway spruce and Silver birch) and their physiological response to water stress. The study was conducted in Aukstaitija integrated monitoring station, Lithuania. Gas exchange parameters and chlorophyll fluorescence were measured during the vegetation season. Meteorological parameters were obtained from the monitoring station. Under moderate drought conditions all investigated tree species demonstrated reduced photosynthetic rates, lower stomatal conduction transpiration rates, water use efficiency and instantaneous carboxylation efficiency. During moderate drought, intercellular CO2 concentration of Norway spruce was higher and this species demonstrated the highest decrease in instantaneous carboxylation efficiency. No significant changes of maximal chlorophyll fluorescence (Fv/Fm) among species were detected during different weather periods except Silver birch. The investigated tree species reacted differently to weather conditions. The Scots pine demonstrated the highest tolerance to different weather conditions. The study confirmed the sensitivity of Norway spruce to drought conditions. The Silver birch was the least sensitive to temperature and humidity conditions variation
Affiliation(s): Aplinkos ir ekologijos institutas
Miškotvarkos ir medienotyros institutas
Miškų ir ekologijos fakultetas
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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