Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/51271
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Campo DC | Valor | Idioma |
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dc.contributor.author | Soares, Cristiano | por |
dc.contributor.author | Branco-Neves, Simão | por |
dc.contributor.author | de Sousa, Alexandra | por |
dc.contributor.author | Azenha, Manuel | por |
dc.contributor.author | Cunha, Ana | por |
dc.contributor.author | Pereira, Ruth | por |
dc.contributor.author | Fidalgo, Fernanda | por |
dc.date.accessioned | 2018-02-28T21:17:45Z | - |
dc.date.issued | 2018-05-01 | - |
dc.identifier.issn | 0048-9697 | por |
dc.identifier.uri | https://hdl.handle.net/1822/51271 | - |
dc.description.abstract | This work was designed to assess the potential role of silicon dioxide nanomaterial (nano-SiO 2) in enhancing barley's tolerance to nickel oxide nanomaterial (nano-NiO). For this purpose, plants were grown for 14 days under nano-NiO (120 mg kg − 1 ) single and co-exposure with nano-SiO 2 (3 mg kg − 1 ). The exposure of barley to nano-NiO caused a significant decrease in growth-related parameters and induced a negative response on the photosynthetic apparatus. However, upon nano-SiO 2 co-exposure, the inhibitory effects of nano-NiO were partially reduced, with lower reductions in fresh and dry biomass, and with the recovery of the photosynthesis-related parameters. Plants growing under nano-NiO stress showed an overproduction of superoxide anion (O 2 − ), which favored the occurrence of oxidative stress and the enhancement of lipid peroxidation (LP), but the co-treatment with nano-SiO 2 reverted this tendency, generally lowering or maintaining the levels of LP and stimulating the redox pathway of thiols. The evaluation of the antioxidant (AOX) system revealed that nano-NiO induced the accumulation of proline, along with a decrease in ascorbate in leaves. Furthermore, superoxide dismutase (SOD) activity was significantly enhanced and catalase (CAT) and ascorbate peroxidase (APX) seemed to have a pivotal role in H 2 O 2 detoxification in leaves and roots, respectively. The response of the AOX system was even more prominent upon nano-SiO 2 co-exposure, reinforcing the ameliorating functions of this nanomaterial. Overall, the present study highlighted the protective role of nano-SiO 2 in barley plants under nano-NiO stress, possibly due to the Si-mediated protection against oxidative stress, by a more proactive performance of the plant AOX system. | por |
dc.description.sponsorship | FEDER - Federación Española de Enfermedades Raras (POCI-01-0145-FEDER-006958) | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier B.V. | por |
dc.rights | restrictedAccess | por |
dc.subject | Antioxidant system | por |
dc.subject | Barley plants | por |
dc.subject | Nickel oxide nanomaterial | por |
dc.subject | Oxidative stress | por |
dc.subject | Photosynthesis | por |
dc.subject | Silicon dioxide nanomaterial | por |
dc.title | SiO₂ nanomaterial as a tool to improve Hordeum vulgare L. tolerance to nano-NiO stress | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
oaire.citationStartPage | 517 | por |
oaire.citationEndPage | 525 | por |
oaire.citationVolume | 622-623 | por |
dc.date.updated | 2018-02-28T18:48:10Z | - |
dc.identifier.doi | 10.1016/j.scitotenv.2017.12.002 | por |
dc.identifier.pmid | 29220775 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | por |
sdum.export.identifier | 3080 | - |
sdum.journal | Science of the Total Environment | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series DBio - Artigos/Papers |
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Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0048969717334216-main.pdf Acesso restrito! | 1,21 MB | Adobe PDF | Ver/Abrir |