Zinc Accumulation and Tolerance in Solanum nigrum are Plant Growth Dependent

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Kalina A Samardjieva (Autor) Outra; Rui F Goncalves (Autor) Outra; Patricia Valentao (Autor) FFUP; Paula B Andrade (Autor) FFUP; Jose Pissarra (Autor) FCUP; Susana Pereira (Autor) FCUP; Fernando Tavares (Autor) FCUP

Revista

Título: International Journal of Phytoremediation

Vol. 17

Páginas: 272-279

ISSN: 1522-6514

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 16 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-009-Y44

DOI: 10.1080/15226514.2014.898018

Abstract (EN): Zinc tolerance, accumulation, and organic acid production by Solanum nigrum, a known Zn accumulator, was studied during pre- and post-flowering stages of development. The plants, when challenged with Zn concentrations lethal to plantlets, showed an increase in tolerance from pre-flowering to post-flowering, which was accompanied by a reduction of Zn translocation to the aerial plant parts. Treatment with Zn induced a differential response in organic acids according to the plant organ and developmental stage. In the roots, where Zn concentrations were similar in pre- and post-flowering plants, a general decrease in organic acid in pre-flowering roots contrasted with the increase observed in post-flowering plants. In the stems, Zn induced a generalized increase in organic acids at both growth stages while in the leaves, a slight increase in malic and shikimic was observed in pre-flowering plants and only shikimic acid levels were significantly increased in post-flowering plants. This work shows that Zn accumulation and tolerance in S. nigrum vary during plant development - an observation that may be important to improve the efficiency of phytoremediation approaches. Furthermore, the data suggest the involvement of specific organic acids in this response.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8