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Type of publication: conference paper
Type of publication (PDB): Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Biologija / Biology (N010)
Author(s): Januškaitienė, Irena;Mildažienė, Vida;Paužaitė, Giedrė;Malakauskiene, Asta;Filatova, Irina
Title: The changes of chlorophyll fluorescence parameters of Echinacea purpurea after pre-sowing seed treatment with cold plasma
Is part of: The vital nature sign [electronic resource] : 12th international scientific conference, May 17-18, 2018, Kaunas, Lithuania : abstract book / editors Nicola Tiso, Vilma Kaškonienė. Kaunas : Vytautas Magnus university, 2018, [no. 12]
Extent: p. 44-44
Date: 2018
Note: Online ISSN: 2335-8718
Keywords: Pre-sowing seed treatment;Echinacea purpurea;Chlorophyll fluorescence;Cold plasma
Abstract: The pre-sowing seed treatment with cold plasma (CP) is currently used in the field of agricultural science as an alternative technology for improving agricultural performance of crops. Seed exposure to CP can lead to stimulation of germination and seedling development followed by the long-term changes in plant metabolism. The objective of this study was to evaluate the persistence of effects of pre-sowing seed treatment with CP on physiological and biochemical activity of plants by chlorophyll a fluorescence parameters in leaves perennial medicinal plant purple coneflower (Echinacea purpurea) in the second season of vegetation. Seeds were processed with capacitively coupled plasma device at a pressure of 60 Pa. The duration of CP exposure was 2, 5 and 7 min. Seeds were sown to substrate four days after CP treatment and seedlings grown for two vegetation seasons. At the beginning of flowering growth stage during the second vegetation season, the chlorophyll a fluorescence measurements were performed by a Plant Efficiency Analyser (PEA) with randomly selected youngest fully expanded leaves. The results showed, that CP had statistically significant effect on several fluorescence parameters of E. purpurea even in the second year after treatment. The differences in the efficiency of second photosystem (Fv/Fm) between control and treated groups were statistically significant (p<0.05): this parameter was higher by 14.7, 13.5 and 14.3 % after 2, 5 and 7 min CP treatments, respectively. Electron transport flux per reaction center (ETo/RC) was also higher for plants grown from CP treated seeds. E.g., seed exposure to CP for 7 min resulted in 47.9% (p<0.05) increase of ETo/RC. The increase of electron transport and efficiency of the PSII might be explained by more than 50 % (p<0.05) decreased dissipated energy flux per reaction center (DIo/RC) after CP treatment. [...]
Affiliation(s): Aplinkotyros katedra
Biologijos katedra
Botanikos sodas
Gamtos mokslų fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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