Wrack Composed by Fucus spp, Ascophyllum nodosum and Pelvetia canaliculata Limits Metal Uptake and Restores the Redox Homeostasis of Barley Plants Grown in Cu-Contaminated Soils

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Sousa, F (Autor) Outra; Martins, M (Autor) Outra; Sousa, B (Autor) Outra; Soares, C (Autor) FCUP; Manuel Azenha (Autor) FCUP; Ruth Pereira (Autor) FCUP; Fernanda Fidalgo (Autor) FCUP

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: JOURNAL OF PLANT GROWTH REGULATION

Vol. 41

Páginas: 3544-3555

ISSN: 0721-7595

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00V-QR1

DOI: 10.1007/s00344-021-10532-x

Abstract (EN): Since metal contamination compromises crop growth and food safety, eco-friendly responses to prevent this are needed. This study provided an integrative evaluation of the potential of wrack (macroalgae debris) to increase the tolerance of Hordeum vulgare L. (barley plant) to copper (Cu).Plants were grown in a soil mixed with 219 mg Cu kg(-1) with/without 2% (m/m) wrack for 14 days. Copper impaired all growth-related parameters. Wrack application counteracted most of these negative impacts and lowered metal accumulation in roots. Metal exposure increased reactive oxygen species content [superoxide anion (O-2(center dot-)) and hydrogen peroxide [H2O2]) and lipid peroxidation degree, which was evaluated through the quantification of malondialdehyde, while co-treatment with wrack partially reverted some of these effects. The non-enzymatic antioxidant (AOX) system was mainly activated by Cu, with accumulated glutathione (GSH), ascorbate (AsA) and phenols, mostly in roots, while proline content was reduced. Wrack protective action was through a modulation of GSH and AsA redox state and enhanced ascorbate peroxidase. The results suggest wrack's potential to alleviate Cu-induced phytotoxicity, which probably relies on the reduction of Cu-induced oxidative stress through a more efficient activity of AOX metabolites and by limiting Cu absorption and bioaccumulation, especially in roots of barley plants.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12