Breeding system in Schlumbergera truncata (How) Mor. (Cactaceae), Jundiaí-SP
Keywords:
Schlumbergera truncata, Cactaceae, breeding system, Brazil, morphologyAbstract
The breeding system of the epiphytic cactus are little known. This study was the first made in Brazil, to verify the existence of self-incompatibility in Schlumbergera truncata. This cactus is used ornamentally and the study was carried out in a urban district in Jundiaí – SP. Hand pollination was done to test self-pollination and outcrossing, and flowers were maintained as control. None of the self-pollinated flowers did developed fruits and seeds; while 92.3% of outcrossed flowers only one control flower developed fruit, indicating that in urban habitats the pollination is difficult. Truncata shows self-incompatibility; the breeding system being obligatorily outcrossed. The reproduction of S. truncata inside cities would only be possible through cross-pollination mediated by hummingbirds.
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References
ABENDROTH, A., 1969, Pollination and fruits of S. truncata. Epiphytes, 2:35-36.
PALAZZO Jr., J. T. & BOTH, M. C., 1993, FLORA ornamental brasileira – Um guia para o paisagismo ecológico. Sagra- DC Luzzato Editores, Porto Alegre, pg. 120.
BOYLE, T. H., 1996, Characteristics of self- incompatibility in Schlumbergera truncata x S. buckleyi (Cactaceae). Sexual Plant Reproduction, 9:49-53.
CORRÊA, M. P., 1952, Dicionário das plantas úteis do Brasil e das exóticas cultivadas. Imprensa Nacional, Rio de Janeiro, 03:272-273.
FIGUEIREDO, R. A. & ALVARES, S.R., 1992, Freqüência de visitas e comportamento alimentar do beija-flor Phaetorrnis pretrei, nas flores de uma Cactaceae. Bioikos, Campinas, 07:28-33.
LOMBARDI, J.A., 1993, Viviparity in Rhipsalis pilocarpa Löfgren (Cactaceae). Ciência e Cultura, 45(6):407.
LORENZI, H. & SOUZA, H. M., 1995, Plantas ornamentais do Brasil – arbustivas, herbáceas e trepadeiras. Ed. Plantarun. Nova Odessa, pg. 239.
MORELLATTO, P.C., 1992, História natural da Serra do Japi – Ecologia de uma área florestal no Sudeste do Brasil. Ed. Unicamp, Campinas, FAPESP, 1992.
MORELLATTO, P. C. & LEITÃO FILHO, H. F., 1995, Ecologia e preservação de uma floresta tropical urba- na – Reserva de Santa Genebra. Ed. Unicamp, Campinas, 4:60-62.
SCHLINDWEIN, C., & WITTMANN, D., 1997, Stamen movements in flowers of Opuntia (Cactaceae) favour oligilectic pollinators. Pl. Syst. Evol, 204:179-193.
SILVA, W.R. & Sazima, M., 1995, Hawkmoth pollination in Cereus peruvianus, a columnar cactus from southeastern Brazil. Flora, 190:339-343.
