Abscission of flower bud pedicels in Begonia. III. Anatomical pattern of abscission

The abscission in Begonia pedicels was studied anatomically. The abscission zone, consisting of small, non-elongated cells, is present already in very young pedicels. The separation proceeds from the outside inward. The pattern is identical in three different clones and is not affected by growth regulators delaying or accelerating the abscission.