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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science Master Journal List / Article in Clarivate Analytics Web of Science Master Journal List (S2)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Baležentienė, Ligita
Title: Immediate allelopathic effect of two invasive Heracleum species on acceptor-germination
Is part of: Acta biologica universitatis Daugavpiliensis. , Vol. 15, No. 1 (2015)
Extent: p. 17-26
Date: 2015
Keywords: Invasion;Allelopathy;Heracleum spp;Phenolics;Phytotoxicity
Abstract: Successful spread of introducted alien plant species in new territories might occur due to following features: rapid growth and reproduction, ability to colonize disturbed habitats, short life cycle, early flowering and seeding, production of large quantities of seeds and vegetative propagules, different phenology from native species, disease- and pest-resistance. Moreover, recently ecological significance of secondary metabolites in ecosystem interactions is approved. Thus, this study is aimed on research of allelochemicals phytotoxicity which is likely to be involved in the invasion success of the invasive species. Assessment of the total phenolics content (TPC) of both Heracleum spp. and its germination suppression of perennial ryegrass (monocots) and winter rapeseed (dicots) seed was done ex situ. The results suggested that invasive plant species may acquire spreading advantage in new territories due to their ability to inhibit germination of other species. The complete inhibition (0%) was observed in 0.2% leaf extracts of both tested Heracleum species due to highest TPC. The TPC varied depending on the H. mantegazianum parts and leachate concentration. The highest content of phenolic compounds (87.98 and 92.06 mg mL-1) accumulated in leaf 0.2% leachates of H. sosnovskyi and H. mantegazzianum respectively, and impacted the lowest acceptor germination. Strong negative correlations were found between TPC in tested Heracleum spp. and germination of acceptor rapeseed (r= -0.8) and ryegrass (r= -0.7). Consequently, the germination response of neighbouring species to invaders allelochemicals might be addressed to regeneration capacity of native plant community. These findings are important to explain variation in the response of native to invasive species at habitat range
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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