Causes of low seed quality in ilex paraguariensis A. St. Hil. samples (aquifoliaceae)

Abstract

This study sought to determine the possible causes of the low seed quality of I. paraguariensis A. St. Hil. Seeds from six samples collected at different sites were classified as empty, decayed, herbivorous and full. Viability was assessed by tetrazolium test in seeds filled with a visualized embryo. High amounts of empty and deteriorated seeds (54% to 93%) were verified in four of the evaluated samples, and insect attack was observed in two samples. The viability of visualized embryo-filled seeds was 83% to 100%. Low quality generally results from the presence of empty and deteriorated seeds, as well as dormancy.