| Texto completo | |
| Autor(es): |
Piva, Vitor Helio
;
Pedersoli, Giseli Donizete
;
Cavallari, Daniel Caracanhas
;
Teixeira, Simone Padua
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Acta Botanica Brasilica; v. 39, p. 13-pg., 2025-01-01. |
| Resumo | |
Humulus lupulus L., commonly known as Hop, is an economically important species in the Cannabaceae family, characterized by diclinous, monochlamydeous, and pentamerous flowers. This study updates the descriptions of the developmental stages of staminate and pistillate flowers in H. lupulus, with a focus on the processes leading to its unique floral features, such as apetaly and a gynoecium containing a single ovule and two long stigmatic branches. Flower buds and flowers of various sizes were processed for surface and histological examination. In addition, the vascularization of the calyx and gynoecium was studied using X-ray micro-computed tomography and clearing techniques. The vascularization and ontogeny confirm the sepal nature of the perianth and reveal dimorphism between the carpels of the flower. This dimorphism supports the pseudomonomerous nature of the gynoecium, where one carpel nourishes the ovule while the other contributes only to the ovary wall. Each carpel produces a stigmatic branch, a feature also observed in other species of Cannabaceae. A notable finding is the presence of an intragynoecial compitum. This study enhances our understanding of the floral structure in H. lupulus through the use of new protocols for floral organ dissection and analysis, including a modified protocol for x-ray micro-computed tomography. (AU) | |
| Processo FAPESP: | 21/14731-3 - Desenvolvimento das flores estaminadas e pistiladas do lúpulo (Humulus lupulus L. - Cannabaceae) com ênfase no cálice e no gineceu |
| Beneficiário: | Vítor Hélio Piva |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |
| Processo FAPESP: | 18/03691-8 - Estruturas secretoras em espécies de rosales |
| Beneficiário: | Simone de Pádua Teixeira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 22/12533-2 - Biologia da célula secretora em espécies de rosales |
| Beneficiário: | Simone de Pádua Teixeira |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOTA - Regular |