Changes on organic acid secretion and accumulation in Plantago almogravensis Franco and Plantago algarbiensis Samp. under aluminum stress

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Neusa Martins (Autor) Outra; Sandra Goncalves (Autor) Outra; Paula B Andrade (Autor) FFUP; Patricia Valentao (Autor) FFUP; Anabela Romano (Autor) Outra

Revista

Título: Plant Science

Vol. 198

Páginas: 1-6

ISSN: 0168-9452

Editora: Elsevier

Indexação

ISI Web of Knowledge - 16 Citações

Scopus - 17 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-002-20E

DOI: 10.1016/j.plantsci.2012.09.001

Abstract (EN): We investigated the effect of Al (400 mu M) on organic acids secretion, accumulation and metabolism in Plantago almogravensis Franco and Plantago algarbiensis Samp. Al induced a significant reduction on root elongation only in P. algarbiensis. Both species accumulated considerable amounts of Al (>120 mu g g(-1)) in their tissues, roots exhibiting the highest contents (>900 mu g g(-1)). Al stimulated malonic acid secretion in P. alga rbiensis, while citric, succinic and malic acids were secreted by P. almogravensis. Moreover, Al uptake was accompanied by substantial increases of citric, oxalic, malonic and fumaric acids contents in the plantlets of either species. Overall, the acid metabolizing enzymes were not directly involved in the Al induced organic acid secretion and accumulation. Our data suggest that Al detoxification in P. almogravensis implies both secretion of organic acids from roots and tolerance to high Al tissue concentrations, while in P. algarbiensis only the tolerance mechanism seems to be involved.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6