Nectar characteristics of hummingbird-visited ornithophilous and non-ornithophilous flowers from Cerrado, Brazil

Araújo, Francielle Paulina de; Hoffmann, Diego; Dambolena, José Sebastián; Galetto, Leonardo; Sazima, Marlies

doi:10.1007/s00606-021-01790-z

Cited by 5 publications

(1 citation statement)

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“…Apocynaceae flowers are reported to be complex and with highly specialized pollination mechanisms, such as strong herkogamy and secondary pollen presentation (Schick 1980(Schick , 1982Fallen 1986;Howell et al 1993;Yeo 1993;Albers and van der Maesen 1994;Lopes and Machado 1999;Torres and Galetto 1999), which increases floral complexity and the level of pollination specialization. The complex pollination mechanism favors cross-pollination (Fallen 1986) and, in general, nectar is the only available resource (Fallen 1986;Galetto 1997;Darrault and Schlindwein 2005;Araújo et al 2011;Araújo et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Reproductive success and production of nectar in Mandevilla funiformis (Apocynaceae): accessibility to visitors and effect of floral stage

Rogalski¹,

Werner²,

Silva³

et al. 2023

Rev. DELOS

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The herbaceous vine Mandevilla funiformis (Vell.) K. Schum. occurs in open vegetation in the Southern Brazil. The present study was carried out in a sandbank, east of Florianópolis, Santa Catarina State. Floral morphology, nectar features (production pattern, removal effects, and standing crop), floral visitors (including pollinator, robber and thief of nectar), fruit set and seed germination of M. funiformis were studied. Every plant produced an average of 31.5 inflorescences. The average total volume and the average sugar concentration of nectar were 81 μL and 24%, respectively. The bees Epicharis (Anepicharis) dejeanii, Eufriesea violacea, Bombus (Fervidobombus) morio, the hummingbird Amazilia fimbriata, and two species of Hesperiidae were considered potential pollinators. The other species were considered consumers, nectar robbers or nectar thieves. Fruit set was 35.6% and average percentage of seed germination was 68%, indicating that visitors are efficient pollinators. This study was the first to report production and consumption of nectar in different floral stages (pre-anthesis, flower open, and after corolla abscission). The high and continuous production of nectar by M. funiformis, from floral buds in the pre-anthesis until after the corolla abscission show a real food availability in different ways (pollinators, consumers, robbers or thieves of nectar).

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