INVESTIGADORES
GALETTO Leonardo
artículos
Título:
Biología reproductiva de Cologania broussonetii (Fabaceae, Faboideae).
Autor/es:
MUSICANTE, M. & GALETTO, L.
Revista:
DARWINIANA
Editorial:
INSTITUTO DE BOTÁNICA DARWINION
Referencias:
Lugar: Buenos Aires; Año: 2008 vol. 46 p. 7 - 16
ISSN:
0011-6793
Resumen:
The breeding system, fruit set, seed set, floral visitors and pollination of Cologania broussonetiiCologania broussonetii
were studied. Four pollination treatments were applied: autogamy, geitonogamy, xenogamy, and natural
pollination (flowers exposed to pollinators). The frequency of visits was recorded, and pollen grains
deposited per stigma on bagged (self pollen deposition) and exposed flowers were counted. The results
indicate that this species is self-compatible and autogamus. A small number of low quality fruits and
seeds (lowest mass and germination capability) were obtained by spontaneous self-pollination. When
fruits obtained by natural pollination were analyzed, a specific pattern of seed formation was detected:
ovules were successively fertilized from the apical to the basal portion of the ovary. However, no
pattern was observed for seed abortion. The frequency of visits of possible pollinators (species of Bombus)
was very low. The number of pollen grains per stigma was similar on bagged and exposed flowers.
Nevertheless, the comparison of quantity and quality of fruits and seeds obtained by natural and
autonomous self-pollination suggests that the visits of pollinators contribute to increase the quality of
seeds (higher mass and germination capability).
was very low. The number of pollen grains per stigma was similar on bagged and exposed flowers.
Nevertheless, the comparison of quantity and quality of fruits and seeds obtained by natural and
autonomous self-pollination suggests that the visits of pollinators contribute to increase the quality of
seeds (higher mass and germination capability).
Bombus)
was very low. The number of pollen grains per stigma was similar on bagged and exposed flowers.
Nevertheless, the comparison of quantity and quality of fruits and seeds obtained by natural and
autonomous self-pollination suggests that the visits of pollinators contribute to increase the quality of
seeds (higher mass and germination capability).
Keywords. Argentina, Chaco Serrano, Cologania, Fabaceae, reproduction, self-compatibility.Argentina, Chaco Serrano, Cologania, Fabaceae, reproduction, self-compatibility.