Qualidade fisiológica de semente de café arábica na presença de alumínio

Abstract

The objective of this study was to evaluate the germination and vigor of the seed of Coffea Arabica L., cultivars Catuaí Amarelo IAC 62, Obatã, Oeiras, and IAPAR 59, in the presence of aluminum. A completely random design was used with four replications, in a 4 x 2 factorial outline, corresponding to the four cultivars and the absence and presence of Al in the form of Al2(SO4)3.16H2O, at the concentration of 45 mg.L-1,. The seeds were placed to germinate in paper-towel, incubated at 30°C without light. There was no significant interaction between cultivars and aluminum. Among the studied cultivars, Catuaí Amarelo (IAC 62) was found to be the one with the most sensitive seeds to aluminium. The germination of the seeds of the studied cultivars was not affected by the concentration of 45 mg.L-1 of Al3+. However, at that Al+3 concentration, the growth of the primary root of the four cultivars was observed to be stimulated.