Biologia floral de Cleistes macrantha (Barb. Rodr.) Schltr. (Orchidaceae: Vanilloideae: Pogoniinae)

Pansarin, Emerson Ricardo

doi:10.1590/s0100-84042003000100008

Cited by 11 publications

(4 citation statements)

References 16 publications

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“…In the orchid family, pollination by species of Bombus is reported for several unrelated groups, and for Brazilian orchids this interaction was described for another three species belonging to distinct subfamilies (van der Pijl & Dodson 1966; Singer & Sazima 1999; Borba & Braga 2003; Pansarin 2003). Among the seven species of Cattleya whose floral biology was studied, three different bee groups were identified as pollinators: (i) Meliponina, which pollinates representatives of the section with the smallest flowers in the genus, section Stellata (van der Pijl & Dodson 1966); (ii) Euglossina, which pollinates species that have a velvety lip surface, section Cattleya (van der Pijl & Dodson 1966; Braga 1977); and (iii) Bombina, which pollinates species with a waxy lip surface (present study).…”

Section: Discussionmentioning

confidence: 96%

Reproductive biology of two Cattleya (Orchidaceae) species endemic to north‐eastern Brazil

Smidt

Silva-Pereira

Borba

2006

Plant Species Biology

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The reproductive biology of the endemic Cattleya elongata and the endemic and critically endangered Cattleya tenuis (Orchidaceae) was studied in areas of 'campo rupestre' and 'caatinga' vegetation, respectively, in the Chapada Diamantina, north-eastern Brazil. Floral visitors and their behavior were recorded, and experimental pollinations were carried out to determine the breeding systems of these species. The species have similar flower morphology, flower in synchrony and both are pollinated by queens of Bombus ( Fervidobombus ) brevivillus (Apidae, Bombina). Flowers of both species do not present nectar despite the presence of a nectary-like cuniculus. Cattleya tenuis presented low natural fruit set (10%), while C. elongata presented a higher fruit set (25%). Both species are selfcompatible, and only C. tenuis presented inbreeding depression, expressed as reduced seed viability in self-pollinations compared with cross-pollinations. The species have a parapatric distribution and differences in their habitats probably act as the principal barriers to the formation of natural hybrids.

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Section: Discussionmentioning

confidence: 96%

Reproductive biology of two Cattleya (Orchidaceae) species endemic to north‐eastern Brazil

Smidt

Silva-Pereira

Borba

2006

Plant Species Biology

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“…Nowadays it is known that the pollination biology of an entire clade (i.e. genus Cleistes) among the vanilloid subtribe Pogoniae is founded on the production of floral nectar as a resource (Pansarin 2003;Pansarin et al 2008aPansarin et al , 2012, while in Vanilleae the offering of nectar as a reward has been recorded in Epistephium and in members of the Neotropical thick-leafed Vanilla clade (Pansarin 2022;Pansarin & Ferreira 2022). Within Vanilla, nectarless and nectarproducing species have been recorded (e.g.…”

Section: Discussionmentioning

confidence: 99%

Non‐species‐specific pollen transfer and double‐reward production in euglossine‐pollinated Vanilla

Pansarin

2023

Plant Biol J

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Commonly attributed to orchids, the pollen movement in Vanilla has been associated with food deception and specific plant–pollinator relationships. This study investigated the role of flower rewards and pollinator specificity in the pollen transfer of a widely distributed member to the euglossinophilous Vanilla clade, V. pompona Schiede using data collected from Brazilian populations. These included investigations on morphology, light microscopy and histochemistry, and analysis of flowers scent using GC–MS. The pollinators and the mechanisms of pollination were recorded through focal observations. The yellow flowers of V. pompona are fragrant and offer nectar as reward. The major volatile compound of the V. pompona scent, carvone oxide, shows convergent evolution in Eulaema‐pollinated Angiosperms. The pollination system of V. pompona is not species‐specific, but its flowers are strongly adapted to pollination by large Eulaema males. Pollination mechanism is based in a combination of perfume collection and nectar seeking. The dogma of a species‐specific pollination system based on food deception in Vanilla has been broken with the increase in studies on this Pantropical orchid genus. Here, least three bee species and dual reward‐offering are involved in pollen transfer in V. pompona. Visitation frequency of bees collecting perfumes, used in courtship by male euglossines, is higher than in searching for food, as short‐lived young euglossine males seem to be more interested in sex than food. A pollination system based on offering both nectar and perfumes as resources is described for the first time in orchids.

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“…2006), both species are members of the euglossinophilous clade (Pansarin 2021b) and show characteristics related to pollination by bees (Pansarin 2021a). In Cleistes (Pogonieae), although visitation by hermit hummingbirds has been recorded for C. libonii , the genus is adapted to pollination by bumblebees (Pansarin 2003; Pansarin et al . 2012).…”

Section: Discussionmentioning

confidence: 99%

Evolutionary disruption in the pollination system of Vanilla (Orchidaceae)

Pansarin

Ferreira

2021

Plant Biol J

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Pollination of the pantropical Vanilla has been linked to melittophily and food deception.• Here we investigated the role of flower traits on the reproduction of Neotropical Vanilla. We also studied the evolution of pollination systems in order to understand the origin of production of flower resources and the diversification of pollinators in this orchid genus. Our study was founded on data of adaptations in flower morphology, production of resources, scent release, pollinators and breeding systems of Vanilla and presenting new data on reproductive biology of V. palmarum. Data on reproductive biology of Vanilla were mapped onto a phylogeny to address our queries on the evolution of pollination systems in this genus.• Vanilla palmarum shows a mixed mating system, with its facultative autogamous flowers being pollinated by hummingbirds. Its yellow flowers are scentless and produces nectar. Mapping of the pollination system onto trees resulted in one origin for bird pollination and at least two origins for autogamy in Vanilla. Nectar secretion has a single origin in the Neotropical thick-leafed lineage.• Bird pollination of Vanilla is shown for the first time. The origin of ornithophily within a bee-pollinated clade is supported by flower morphology. Floral transitions to ornithophily have been favoured by the occupation of a distinct niche from that of the other thick-leafed Vanilla species. Despite its specialized pollination, V. palmarum is autogamous. A mixed mating system can promote reproductive assurance in the case of a decline in pollinator populations, or in areas where pollinator services are irregular or absent.

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Biologia floral de Cleistes macrantha (Barb. Rodr.) Schltr. (Orchidaceae: Vanilloideae: Pogoniinae)

Cited by 11 publications

References 16 publications

Reproductive biology of two Cattleya (Orchidaceae) species endemic to north‐eastern Brazil

Reproductive biology of two Cattleya (Orchidaceae) species endemic to north‐eastern Brazil

Non‐species‐specific pollen transfer and double‐reward production in euglossine‐pollinated Vanilla

Evolutionary disruption in the pollination system of Vanilla (Orchidaceae)

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