Please use this identifier to cite or link to this item:
|Type:||Artigo de periódico|
|Title:||The Control Of Flower Initiation By Gibberellin In Helianthus Annuus L. (sunflower), A Non-photoperiodic Plant|
|Abstract:||The involvement of gibberellins in the control of flowering of sunflower was studied by direct application of GA 3 to the apex of the plants, analysis of the endogenous levels of gibberellin-like substances at different plant ages, and indirectly by the application of paclobutrazol, an inhibitor of gibberellin synthesis. GA 3 speeded-up flower initiation and floral apex development. The time of GA 3 application was more critical than the amount of GA 3 applied. The endogenous levels of gibberellin-like compounds increased significantly by day 15 after sowing. The application of paclobutrazol markedly delayed floral initiation and this effect was also dependent on plant age. Both GA 3 and paclobutrazol had their greatest effects between 10 and 20 days after sowing suggesting that an increase in gibberellins in that time period plays a role in floral initiation.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.