The effects of high levels of Hg on senescence, proline accumulation and stress enzymes activities of maize plants

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Ferreira, C (Autor) Outra; Vieira, CL (Autor) Outra; Azevedo, H (Autor) Outra; Caldeira, G (Autor) Outra

Revista

Título: Agrochimica

Vol. 42

Páginas: 208-218

ISSN: 0002-1857

Editora: Pisa University Press

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-001-73W

Abstract (EN): Intact plants of Zea mays L. var. Colt were grown for eight days with different concentrations of Hg (0, 50, 100, 200 and 400 mM). When exposed to Hg stress, the maize plants suffered a decrease in plant growth and chlorophyll a and b contents in shoots. Hg levels increased with increasing Hg content in the medium, but was much higher in roots than in shoots. On the contrary, K content decreased both in the roots and shoots. An increase in proline contents was found in the whole plant with increasing Mg in the medium. Soluble proteins increased in shoots but decreased in roots, where Hg content may reach values 100 times higher than those of shoots. ME; increased peroxidase activities, but decreased amylase activities in shoots.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11