Aspectos de la biología floral y el sistema reproductivo de Passiflora mooreana (Passifloraceae).

AMELA GARCÍA, M. T. & HOC, P. S.

DARWINIANA

Instituto de Botánica Darwinion

Lugar: Bs. As.; Año: 1998 vol. 35 p. 9 - 27

0011-6793

Through anthesis, which starts after 1 p.m., 3 floral phases were distinguished, all with stigmas receptive and with nectar: phase 1 and 3 with stigmas up, the last one, less turgid (pollen donors); phase 2 with stigmas recurved, near anthers (receptors and donors of pollen). Flowers in phase 2 occur simultaneously with others in phase 1 (during the day), and with others in phase 3 (during the night). Sugar concentration in nectar varies: it is acceptable for Hymenoptera in the afternoon (when Xylocopa spp. and Centris spp. pollinate) and acceptable for sphingids after sunset (when Erinnyis ello seems to pollinate). P. mooreana is melitophilous, but also is a resource for moths in the evening. Flowers showed low degree of autoincompatibility. The low percent of fruits obtained suggests that the great distance between plants does not favor cross-pollination. The ovary wall may grow without pollination.