Determina??o do teor de carboidratos em minicepas de Eucalyptus benthamii

摘要

The aim of this study was to evaluate the foliar content of soluble carbohydrates non-structural of Eucalyptus benthamii mini-stumps regarding to Zn and B concentrations during successive shoot collections. Shoots were collected from mini-stumps fertigated with nutrient solutions containing different Zn and B concentrations (S1 – free of Zn and B, S2 – 0.5 mg L -1 Zn, S3 – 0.5 mg L -1 B, S4 – 0.5 mg L -1 Zn and B, S5 – 1.0 mg L -1 Zn and B, S6 – 2.0 mg L -1 Zn and B). Eight shoot collection of the clonal mini-garden were performed . The content total of soluble carbohydrates non-structural of leaves (sucrose, glucose and fructose) was determined in the 2 nd , 4 th , 6 th and 8 th shoot collections. The increasing of the Zn and B concentrations in the nutrient solution induced reduction of the total content of soluble carbohydrates non-structural of leaves, and the fructose was the most affected. Key-words : Nutritive solution, fertigation, mini-cutting technique, glucose, fructose, sucrose