Data/hora: 05/06/2024 15:27:06

Provedor de dados: | 65
País: | Brazil
Título: | Nutritional disorder in Pfaffia glomerata by mercury excess in nutrient solution
Autores: | Calgaroto,Nicéia Spanholi; Nicoloso,Fernando Teixeira; Pereira,Luciane Belmonte; Cargnelutti,Denise; Antes,Fabiane Goldschmidt; Dressler,Valderi Luiz.
Data: | 2016-02-01
Ano: | 2016
Palavras-chave: | Brazilian Ginseng; Nutritional homeostasis; Macronutrients; Micronutrients; Hg toxicity.
Resumo: | ABSTRACT: The mineral nutritional homeostasis in response to different concentrations of Hg (0, 25 and 50μM) was evaluated in Pfaffia glomerata plant. The exposure to the highest level of Hg (50µM) caused a decreasing in shoot and root fresh weights of 15.5% and 20%, respectively. Both shoot and root Hg concentrations increased linearly with increasing external Hg concentrations. Ca concentration decreased in shoot only at 50µM Hg, whereas shoot K and Mg concentrations decreased at both 25 and 50µM Hg, when compared to the control. A significant decrease in Cu, Zn, Fe and Mn concentrations in plants exposed to Hg was observed, but most Zn, Mn, and Cu in the roots. On the other hand, P concentration increased in both root and shoot of plants exposed at 25 and 50µM Hg, whereas Na concentration increased only in the root at 25 and 50µM Hg exposure. In general, tissue nutrient concentrations in P. glomerata plantlets exposed to Hg were significantly decreased, which indicates that the Hg may cause alteration on the mineral nutritional homeostasis of this species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000200279
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20141733
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess