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Type of publication: Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Baležentienė, Ligita
Title: Evaluation of Invasive Species Adaptation by Applying Fluorescence Measurement
Is part of: The Vital Nature Sign [elektroninis išteklius]: 12th International scientific conference, May 17-18, 2018, Kaunas, Lithuania : abstract book / Editors: Nicola Tiso, Vilma Kaškonienė. Kaunas : Vytautas Magnus University, 2018
Extent: p. 6
Date: 2018
Series/Report no.: (Oral presentation)
Note: ISSN 2335-8653 ; Online ISSN 2335-8718
Keywords: Fluorescence parameters;invasive species
Abstract: The chlorophyll a fluorescence was measured in situ using light-adapted pulse-amplitude modulation method at different plant growth stages during vegetation period in 10 replications every month during plant vegetation period of 2016 in grassland habitats, Kaunas distr., Lithuania. Initial fluorescence (Fs), maximal fluorescence (Fms), the maximum photochemical efficiency of PSII (Fv/Fm), photochemical quenching (ΔF) were measured to evaluated light efficiency in PSII. Between species, the lowest determined Fs and Fms emissions were in R conf and T offi leaves and indicated the lowest PSII electron transport efficiency than that of F jap and H sosn. The highest Fs means of H sosn and F jap revealed their photosynthetic efficiency and successful adaptation to invaded environment. F jap and H sosn proved the biggest mean ETR of 38.36 and 38.13 μmol m-2 s-1. Lower values of mean photosynthetical activity, i.e. ETR of 35.35 and 35.74 μmol m-2 s-1 were determined for species with smaller bodies T offi and R conf, respectively. Y is a sensitive indicator of photosynthetic stress was the highest for F jap (0.762 μmol m-2 s-1) and H sosn (0.758 μmol m-2 s-1) and exhibited the lowest their stress and the highest adaptation facilities to new environment. R conf and T offi exhibited smaller Y values than former species which ranged between 0.710 and 0.702 μmol m-2 s-1. The biggest absorbed mean photon energy by PSII of 1327.58 and 1301.34 μmol m-2 s-1 revealed the most photo-productive species, i.e. F jap and H sosn. Light induced fluorescence parameters varied through growth period due to abiotic conditions and plant growth stage. Recorded high values of main fluorescence parameters confirm good physiological adaptation of assessed invasive species to new environment of temperate climate in Lithuania
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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