naa a22 4500 510737722 CHVBK 20180411083017.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11284-013-1050-0 doi (NATIONALLICENCE)springer-10.1007/s11284-013-1050-0 The reproductive biology of two understory plants in the Atlantic rain forest, Brazil [Elektronische Daten] [Katharina Stein, Isabell Hensen] Outcrossing and sexual reproduction of most flowering plants depends on pollinators. Plant traits likely to be involved in pollinator attraction include flower color, shape, and size. Furthermore, plant or flower density and the temporal flowering pattern may have an effect on reproduction. In this study, we examine the pollination ecology, breeding system, female reproductive output, and germination of two tropical understory species, Stenostephanus lobeliiformis (Acanthaceae) and Besleria melancholica (Gesneriaceae), which differ in these traits. Pollinator observations revealed that the dense flowering S. lobeliiformis with pinkish flowers received a higher diversity of pollinators, but visitor frequency measured as visits per flower per hour was much less (0.1h−1) than that to B. melancholica, which has a smaller floral display of dull-colored flowers (1.5h−1). Pollination experiments revealed that S. lobeliiformis but not B. melancholica is pollen-limited. In addition, both species are partially self-incompatible and depend on pollinators for outcrossing. Natural fruit set of open-pollinated unmanipulated flowers (control treatment) in both species is 22-26%. Germination studies indicated inbreeding depression in S. lobeliiformis. We conclude that the pollination ecology of these species is influenced by a broad set of traits and that very different combinations of these traits can be successful in terms of reproduction. The Ecological Society of Japan, 2013 Besleria melancholica nationallicence Floral visitors nationallicence Hummingbird nationallicence Nectar nationallicence Nectar robbing nationallicence Phaethornis nationallicence Pollination experiments nationallicence Reproductive biology nationallicence Stenostephanus lobeliiformis nationallicence Trigona nationallicence Stein Katharina Institute of Biology/Geobotany and Botanical Garden, Martin-Luther-University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle/Saale, Germany aut Hensen Isabell Institute of Biology/Geobotany and Botanical Garden, Martin-Luther-University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle/Saale, Germany aut Ecological Research Springer Japan 28/4(2013-07-01), 593-602 0912-3814 28:4<593 2013 28 11284 https://doi.org/10.1007/s11284-013-1050-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-013-1050-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stein Katharina Institute of Biology/Geobotany and Botanical Garden, Martin-Luther-University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle/Saale, Germany aut NATIONALLICENCE 700 1- Hensen Isabell Institute of Biology/Geobotany and Botanical Garden, Martin-Luther-University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle/Saale, Germany aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/4(2013-07-01), 593-602 0912-3814 28:4<593 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer