Paggi et al. 2013 (Article) Vriesea

Reproductive system and fitness of Vriesea friburgensis, a self-sterile bromeliad species

Author(s):— Paggi, G. Silveira, L. Zanella, C. Bruxel, M. Bered, F.K. S., E.P. S. & C.

Publication:—Plant Species Biology 28(3): 169-176. (2013) — DOI

Abstract:—Reproductive biology and plant fertility are directly related to many aspects of plant evolution and conservation biology. Vriesea friburgensis is an epiphytic and terrestrial bromeliad endemic to the Brazilian Atlantic rainforest. Hand-pollination experiments were used to examine the reproductive system in a wild population of V.?friburgensis. Plant fertility was assigned considering flower production, fruit and seed set, seed germination, and pollen viability. Self-sterility observed from spontaneous selfing and manual self-pollination treatments may be the consequence of late-acting self-incompatibility. Hand-pollination results indicated no pollen limitation in the population studied. Floral biology features such as a few daily open flowers, nectar production, and sugar concentration corroborate hummingbirds as effective pollinators, although bees were also documented as pollinators. Components of fitness such as high flower, fruit, and seed production together with high seed and pollen viability indicate that this wild population is viable. From a conservation point of view, we highlight that this self-sterile species depends on pollinator services to maintain its population fitness and viability through cross-pollination. Currently, pollinators are not limited in this population of V.?friburgensis. Conversely, the maintenance and continuous conservation of this community is essential for preserving this plant?pollinator mutualism.

Keywords:—Brazilian Atlantic rainforest, Bromeliaceae, fruit set, late-acting self-incompatibility, nectar features, seed viability