Nutritional disorder in Pfaffia glomerata by mercury excess in nutrient solution

Ciência Rural

Dressler, Valderi Luiz⁴  Nicoloso, Fernando Teixeira⁴  Cargnelutti, Denise¹  Calgaroto, Nicéia Spanholi⁴  Antes, Fabiane Goldschmidt³  Pereira, Luciane Belmonte² 

[1] Universidade Federal da Fronteira Sul, Erechim, Brazil;Instituto Federal de Educacão, Ciência e Tecnologia de Mato Grosso, Campo Novo do Parecis, Brazil;Empresa Brasileira de Pesquisa Agropecuária, Porto Velho, Brazil;Universidade Federal de Santa Maria, Santa Maria, Brazil

关键词: Brazilian Ginseng;    nutritional homeostasis;    macronutrients;    micronutrients;    Hg toxicity;   

DOI  :  10.1590/0103-8478cr20141733

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

: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.

【 授权许可】

Unknown