Repository logo
 
Publication

Reproductive cycle progression arrest and modification of cell morphology (shape and biovolume) in the alga Pseudokirchneriella subcapitata exposed to metolachlor

2020Journal article Restricted access
Simple item page
dc.contributor.authorMachado, Manuela Dias
dc.contributor.authorSoares, Eduardo V.
dc.date.accessioned2021-05-07T14:15:53Z
dc.date.embargo2100
dc.date.issued2020
dc.description.abstractMetolachlor (MET) is an herbicide widely used and frequently found (at μg L-1) in aquatic systems. This work aimed to study the modes of action of MET on the green microalga Pseudokirchneriella subcapitata. Algae exposed to 115 or 235 μg L-1 MET, for 48 or 72 h, presented a reduction of metabolic activity, chlorophyll a and b content and photosynthetic efficiency. The exposure to 115 or 235 μg L-1 MET also induced growth yield reduction, mean cell biovolume increase and alteration of the typical algae shape (cells lunate or helically twisted) to "French croissant"-type; at these MET concentrations, algal population was mainly composed by multinucleated cells (≥ 4 nuclei), which suggest that MET impairs the normal progression of the reproductive cycle but did not hinder nuclear division. The accumulation of multinucleated cells seems to be the consequence of the incapacity of the parent cell to release the autospores. In conclusion, MET disrupts the physiology of P. subcapitata cells; the disturbance of the progression of the reproductive cycle should be in the origin of growth slowdown (or even its arrest), increase of mean cell biovolume and modification of algal shape. This work contributed to elucidate, in a systematically and integrated way, the toxic mechanism of MET on the non-target organism, the alga P. subcapitata.pt_PT
dc.description.sponsorshipThis study was supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UID/ BIO/04469/2020 unit and BioTecNorte operation (NORTE-01-0145- FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte.
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.aquatox.2020.105449pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/17915
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationUID/BIO/04469/2020
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0166445X19310355?via%3Dihub#!pt_PT
dc.subjectAcetamidespt_PT
dc.subjectChlorophyceaept_PT
dc.subjectChlorophyll Apt_PT
dc.subjectDose-Response Relationship, Drugpt_PT
dc.subjectHerbicidespt_PT
dc.subjectMicroalgaept_PT
dc.subjectPhotosynthesispt_PT
dc.subjectReproductionpt_PT
dc.subjectWater Pollutants, Chemicalpt_PT
dc.titleReproductive cycle progression arrest and modification of cell morphology (shape and biovolume) in the alga Pseudokirchneriella subcapitata exposed to metolachlorpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage105449pt_PT
oaire.citation.titleAquatic Toxicologypt_PT
oaire.citation.volume222pt_PT
person.familyNameDias Machado
person.familyNameSoares
person.givenNameManuela
person.givenNameEduardo
person.identifier93637
person.identifier.ciencia-id491C-EDE6-F3F3
person.identifier.ciencia-idD612-0D0E-4984
person.identifier.orcid0000-0003-3519-8654
person.identifier.orcid0000-0003-2280-5291
person.identifier.ridO-5908-2015
person.identifier.scopus-author-id23485908300
person.identifier.scopus-author-id7102060173
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication98b9a815-89d6-45cf-8d6d-e9de0599a8cd
relation.isAuthorOfPublicationb3ebdee1-84fa-4183-a1d8-c3cdcaaef219
relation.isAuthorOfPublication.latestForDiscovery98b9a815-89d6-45cf-8d6d-e9de0599a8cd

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
ART2_CIETI_2020.pdf
Size:
4.31 MB
Format:
Adobe Portable Document Format
Download

Collections

ISEP – CIETI – Artigos
ISEP – DEQ – Artigos