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Title: Study of the reproductive biology of an Amazonian Heterotaxis (Orchidaceae) demonstrates the collection of resin‑like material by stingless bees.
Authors: Krahl, Amauri Herbert
Holanda, Ana Sofia Sousa de
Krahl, Dayse Raiane Passos
Martucci, Maria Elvira Poleti
Gobbo Neto, Leonardo
Webber, Antonio Carlos
Pansarin, Emerson Ricardo
Keywords: Floral reward
Meliponini bees
Issue Date: 2019
Citation: KRAHL, A. H. et al. Study of the reproductive biology of an Amazonian Heterotaxis (Orchidaceae) demonstrates the collection of resin‑like material by stingless bees. Plant Systematics and Evolution, v. 305, n. 4, p. 281–291, abr. 2019. Disponível em: <>. Acesso em: 25 fev. 2019.
Abstract: Tropical and subtropical plants provide to pollinators a range of nutritive and non-nutritive materials as alternative to pollen and nectar, including resins, which are gathered by females of several groups of social and solitary bees. Although resinlike material has previously been recorded in Maxillariinae, these investigations generally did not present data relating to pollinators. In fact, the collection of resins has never been recorded elsewhere in orchids. The aim of this paper was to provide a detailed study of the reproductive biology of an Amazonian Heterotaxis, H. superfua, based on records of fowering phenology, foral morphology, pollinator behavior and breeding system. Heterotaxis superfua ofers resin-like material to pollinators and is pollinated by a single species of stingless bee. The resin is a heterogeneous material rich in mucilage, starch and sugars, while lipoidal substances occur as small droplets. Chemical analyses confrm the presence of sugar, which explain the presence of reducing sugars and mucilage detected in the histochemical investigations. Our data also showed the Heterotaxis is self-compatible and pollinator dependent. This study demonstrates for the frst time the collection of resin-like material in orchids. The gathering of resin is frequently associated with the nest construction, since this material is considered to be a water-repellent and has anti-pathogen chemical properties. Despite ofering of a foral reward, fruit set under natural conditions is lower than for experimental pollinations, suggesting limited pollen fow within the population.
ISSN: 2199-6881 
Appears in Collections:DEFAR - Artigos publicados em periódicos

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