Search

IT has been shown1that the apical region of the gametophore of Splachnum ampulloceum (L.) Hedw. inhibits both lateral bud reactivation throughout the gametophore and protonematal regeneration from the base of the gametophore. These apical dominance effects could be replaced by the application of indoleacetic acid to the tips of decapitated plants.

Stowe and Yamaki1wrote, in a recent review, of the work on the physiological action of the gibberillins: “Reminiscent of the auxins, no convincing action of the gibberillins has yet been shown on any organisms except higher plants”. In the course of studies on protonematal regeneration and growth in the moss Splachnum ampullaceum (L.) Hedw., the effect of gibberellic acid on the growth of the protonemata was also tested.