INDUCTION OF BOLTING AND FLOWERING IN HYOSCYAMUS AND SAMOLUS BY A GIBBERELLIN-LIKE MATERIAL FROM A SEED PLANT

Publisher Website
Google Scholar
Abstract
Treat-ment with gibberellin induces bolting (stem elongation) and flower formation in many biennial and long-day rosette plants grown on a non-inductive temperature or photoperiod regime. The gibberellins are products of certain strains of the fungus Fusarium moniliforme (sexual stage, Gibberella fujikuroi) and are not known to occur in any other plant. Immature seeds or fruits of numerous angiosperms contain materials causing normal growth in certain dwarf mutants of maize (Zea mays) which otherwise respond only to gibberellin. If these gibberellin-like substances of seed plants regulate bolting and flowering in a manner similar to that of the Fusarium gibberellins. it becomes highly probable that they function as normal, native regulators of these processes in the plant. The present paper provides evidence that bolting and flowering in rosette plants can indeed be induced by the application of gibberellin-like materials from a seed plant. Application of endosperm of Echinocystis macrocarpa (Cucurbitaceae) caused prompt bolting and flowering in biennial H. niger and in the long-day plant S. parviflorus grown under non-inductive conditions. The effect can be attributed to the gibberellin-like materials which are present in this endosperm. It is concluded that gibberellin-like materials participate in the processes of flower formation in plants and in their control by low temperature and photoperiod.

This publication has 2 references indexed in Scilit: