Realistic low-doses of two emerging contaminants change size distribution of an annual flowering plant population

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dc.contributor.author Patama, Marjo
dc.contributor.author Belz, Regina G.
dc.contributor.author Sinkkonen, Aki
dc.date.accessioned 2021-02-01T09:45:01Z
dc.date.available 2021-02-01T09:45:01Z
dc.date.issued 2019-09
dc.identifier.citation Patama , M , Belz , R G & Sinkkonen , A 2019 , ' Realistic low-doses of two emerging contaminants change size distribution of an annual flowering plant population ' , Ecotoxicology , vol. 28 , no. 7 , pp. 732-743 . https://doi.org/10.1007/s10646-019-02069-3
dc.identifier.other PURE: 124562106
dc.identifier.other PURE UUID: 681ff3a5-f714-48d6-a6e4-813d49c20bb4
dc.identifier.other WOS: 000484610700002
dc.identifier.other ORCID: /0000-0002-6821-553X/work/62631531
dc.identifier.other ORCID: /0000-0003-1921-5725/work/62633404
dc.identifier.uri http://hdl.handle.net/10138/325592
dc.description.abstract HHCB [1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta(g)-2-benzopyran] and 4-tert-octylphenol [4-(1,1,3,3-tetramethylbutyl)phenol] are widely used emerging contaminants that have the potential to cause adverse effects in the environment. The purpose of this study was to observe if and how environmentally realistic concentrations of these contaminants alter growth in plant populations. It was hypothesized that within an exposed Gypsophila elegans Bieb (annual baby's breath) population especially fast-growing seedlings are impaired even when the population mean is unaffected, and small doses can cause hormesis and, thus, an increase in shoot or root length. In a dose-response experiment, an experimental population of G. elegans was established (total 15.600 seeds, 50 seeds per replicate, 24 replicates per concentration, 5.2 seedlings/cm(2)) and exposed to 12 doses of HHCB or 4-tert-octylphenol. After five days, shoot and root length values were measured and population averages, as well as slow- and fast-growing subpopulations, were compared with unexposed controls. Growth responses were predominantly monophasic. HHCB seemed to selectively inhibit both root and shoot elongation among slow- and fast-growing individuals, while 4-tert-octylphenol selectively inhibited both root and shoot elongation of mainly fast-growing seedlings. The ED50 values (dose causing 50% inhibition) revealed that the slow-growing seedlings were more sensitive and fast-growing seedlings less sensitive than the average of all individuals. Although there was toxicant specific variation between the effects, selective toxicity was consistently found among both slow- and fast-growing plants starting already at concentrations of 0.0067 mu M, that are usually considered to be harmless. This study indicates that these contaminants can change size distribution of a plant population at low concentrations in the nM/mu M range. fi
dc.description.abstract HHCB [1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta(g)-2-benzopyran] and 4-tert-octylphenol [4-(1,1,3,3-tetramethylbutyl)phenol] are widely used emerging contaminants that have the potential to cause adverse effects in the environment. The purpose of this study was to observe if and how environmentally realistic concentrations of these contaminants alter growth in plant populations. It was hypothesized that within an exposed Gypsophila elegans Bieb (annual baby's breath) population especially fast-growing seedlings are impaired even when the population mean is unaffected, and small doses can cause hormesis and, thus, an increase in shoot or root length. In a dose-response experiment, an experimental population of G. elegans was established (total 15.600 seeds, 50 seeds per replicate, 24 replicates per concentration, 5.2 seedlings/cm(2)) and exposed to 12 doses of HHCB or 4-tert-octylphenol. After five days, shoot and root length values were measured and population averages, as well as slow- and fast-growing subpopulations, were compared with unexposed controls. Growth responses were predominantly monophasic. HHCB seemed to selectively inhibit both root and shoot elongation among slow- and fast-growing individuals, while 4-tert-octylphenol selectively inhibited both root and shoot elongation of mainly fast-growing seedlings. The ED50 values (dose causing 50% inhibition) revealed that the slow-growing seedlings were more sensitive and fast-growing seedlings less sensitive than the average of all individuals. Although there was toxicant specific variation between the effects, selective toxicity was consistently found among both slow- and fast-growing plants starting already at concentrations of 0.0067 mu M, that are usually considered to be harmless. This study indicates that these contaminants can change size distribution of a plant population at low concentrations in the nM/mu M range. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Ecotoxicology
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1172 Environmental sciences
dc.subject 1181 Ecology, evolutionary biology
dc.subject Dose-response
dc.subject Growth stimulation
dc.subject Hormesis
dc.subject Low toxin doses
dc.subject Selective toxicity
dc.subject SEWAGE-SLUDGE
dc.subject CHEMICAL INTERFERENCE
dc.subject RESOURCE COMPETITION
dc.subject POLYCYCLIC MUSKS
dc.subject COPPER-SULFATE
dc.subject HORMESIS
dc.subject GROWTH
dc.subject STIMULATION
dc.subject RESPONSES
dc.subject WATER
dc.subject Dose-response
dc.subject Growth stimulation
dc.subject Hormesis
dc.subject Low toxin doses
dc.subject Selective toxicity
dc.subject SEWAGE-SLUDGE
dc.subject CHEMICAL INTERFERENCE
dc.subject RESOURCE COMPETITION
dc.subject POLYCYCLIC MUSKS
dc.subject COPPER-SULFATE
dc.subject HORMESIS
dc.subject GROWTH
dc.subject STIMULATION
dc.subject RESPONSES
dc.subject WATER
dc.title Realistic low-doses of two emerging contaminants change size distribution of an annual flowering plant population en
dc.type Article
dc.contributor.organization Department of Agricultural Sciences
dc.contributor.organization Environmental Sciences
dc.contributor.organization Environmental Ecology
dc.contributor.organization Ecosystems and Environment Research Programme
dc.contributor.organization Nature-Based Solutions
dc.contributor.organization University Management
dc.contributor.organization Aki Tapio Sinkkonen / Principal Investigator
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s10646-019-02069-3
dc.relation.issn 0963-9292
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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