Growth forms of Parietaria debilis (Urticaceae) and Veronica persica (Plantaginaceae)
This work analyzes growth forms in V. persica and P. debilis, in order to identifytheir structural development under undisturbed conditions. Branching systems of shoots and their temporal and spatial variation, several structural and developmental features as well as growth direction and foliar se...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Artículo revista |
| Lenguaje: | Inglés |
| Publicado: |
Sociedad Argentina de Botánica
2014
|
| Materias: | |
| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/9467 |
| Aporte de: |
| Sumario: | This work analyzes growth forms in V. persica and P. debilis, in order to identifytheir structural development under undisturbed conditions. Branching systems of shoots and their temporal and spatial variation, several structural and developmental features as well as growth direction and foliar sequence were studied in plants grown from seed in growth rooms and plants collected in the field.In both species studied, the main axis and the basal branches behave similarly, so they may be considered equivalent structures. In these axes, the zone that produces long branches has an opposite phyllotaxis, while the zone that bears reproductive structures has an alternate phyllotaxis. Along the main axis and the basal paracladia of V. persica, an inhibition zone is observed. Parietaria debilis lacks such a region and shows, instead, a continuous type of branching. As annual species, the whole branching systems forms a synflorescence. As regards the relationship between the growth form of these two species and their behavior as crop weeds, it may be stated that, being annual species, their high capability to produce flowering structures determines a significant rate of seed production. |
|---|