Pollination of Adenocalymma bracteatum (Bignoniaceae): floral biology and visitors

Almeida-Soares, Stela; Polatto, Leandro Pereira; Dutra, João Clovis Stanzani; Torezan‐Silingardi, Helena Maura

doi:10.1590/s1519-566x2010000600015

Cited by 17 publications

(18 citation statements)

References 49 publications

(45 reference statements)

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“…(Bignoniaceae). A espécie vegetal em estudo se enquadra na síndrome de melitofilia, cujas flores estão adaptadas à polinização por abelhas de grande porte corporal, comumente denominadas por mamangavas (aLMeida-soaRes et al 2010). Ainda de acordo com esses autores, as flores também apresentam nectários extraflorais atrativos às formigas.…”

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“…A floração de A. bracteatum ocorre comumente entre março e julho, em época de transição entre os períodos chuvosos e de seca (yanagiZaWa & MaiMoni-RodeLLa 2007;aLMeida-soaRes et al 2010).…”

Section: Espécie Vegetal Estudadaunclassified

“…As flores apresentam formato floral do tipo goela (Figura 1) (FaegRi & van deR PijL 1979) e disponibilizam pólen e principalmente néctar às abelhas (aLMeida-soaRes et al 2010). A disposição espacial das anteras e estigma, ambos localizados na região interna e superior da corola, otimiza a polinização por abelhas grandes (aLMeida-soaRes et al 2010) (Figura 1).…”

Section: Espécie Vegetal Estudadaunclassified

“…Nessa área focal tinham três indivíduos da espécie vegetal estudada, que se encontravam floridos durante o desenvolvimento do estudo. Embora as flores dessa espécie vegetal durem apenas um dia, os indivíduos comumente permanecem em floração por um longo período (aLMeida-soaRes et al 2010).…”

Section: Espécie Vegetal Estudadaunclassified

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Influência dos Fatores Ambientais e da Quantidade de Néctar na Atividade de Forrageio de Abelhas em Flores de Adenocalymma bracteatum (Cham.) DC. (Bignoniaceae)

Silva

Dutra

Nucci³

et al. 2013

EntomoBrasilis

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Resumo. Este trabalho teve como objetivo avaliar a influência diária dos fatores ambientais e da quantidade de néctar na frequência de forrageio de abelhas em flores de Adenocalymma bracteatum (Cham.) DC. Para isso, foi demarcada uma área focal e registrada a atividade de forrageio das abelhas em um intervalo de 30 minutos para cada hora, das 6:00 às 17:30 h, nas flores da referida espécie vegetal durante quatro dias não consecutivos. Também foi avaliada a produção acumulativa de néctar e o seu consumo pelos visitantes no decorrer do dia. Dados referentes à temperatura, umidade relativa do ar, luminosidade e velocidade do vento foram anotados no início de cada hora. Para verificar se as frequências de forrageios das espécies de abelhas estavam correlacionadas com os fatores abióticos, foram realizados testes de correlação de Pearson. Dentre as espécies registradas, Oxaea flavescens Klug apresentou o maior número de forrageios. O número de forrageio no decorrer do dia não se manteve uniforme, o que faz acreditar que a atividade de forrageio das abelhas sofreu interferência dos fatores ambientais e da quantidade de néctar presente nas flores de A. bracteatum. Os polinizadores efetivos foram responsáveis por 51,6% do total de visitas por flor em A. bracteatum, enquanto os pilhadores de recursos perfizeram 33,1% e os furtadores de recursos realizaram somente 15,3% do total de visitas por flor. Houve ainda, forrageios de formigas e moscas. As formigas sugavam néctar extrafloral, possivelmente conferindo proteção contra pilhagem de néctar. Já as moscas pousavam na corola, mas não extraíram néctar nem pólen. Palavras-chave:Abelha; Furto/Pilhagem de néctar; Mamangavas; Polinizadores. Abstract. This study aimed to evaluate the daily influence of environmental factors and the amount of nectar in the foraging frequency of bees on flowers Adenocalymma bracteatum (Cham.) DC. For this, a focal area was demarcated and registered foraging activity of bees in a 30-minute break for every hour from 6:00 a.m. to 5:30 p.m., in the flowers of this plant species during four non-consecutive days. Also was analyzed the nectar production and its consumption by visitors throughout the day. Data relating to temperature, relative humidity, luminosity, and wind speed were recorded at the beginning of each hour. To check if the frequencies of foraging the bee species were correlated with abiotic factors, tests of Pearson correlation were performed. Among the species recorded, Oxaea flavescens Klug had the highest number of foraging. The number of foraging during the day did not remain uniform, which makes to believe that foraging activity of bees suffered interference from environmental factors and the amount of nectar present in flowers of A. bracteatum. The effective pollinators were responsible for 51.6% of total visits per flower in A. bracteatum, while the robber's resources totaled 33.1%, and only 15.3% of all visits were made by thieves' resource. There was also foraging of ants and flies. Nectar present around the flower was sucked by...

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Section: Espécie Vegetal Estudadaunclassified

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Influência dos Fatores Ambientais e da Quantidade de Néctar na Atividade de Forrageio de Abelhas em Flores de Adenocalymma bracteatum (Cham.) DC. (Bignoniaceae)

Silva

Dutra

Nucci³

et al. 2013

EntomoBrasilis

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“…The geographic range of this species extends from Costa Rica to Northern Argentina (Roubik & Hanson 2004), within which the bees are most commonly encountered in open areas, such as the Cerrado vegetation of Brazil (Rebêlo & Garófalo 1997, Nemésio & Faria-Jr 2004, Alvarenga et al 2007). E. nigrita plays an important role for the pollination of native and economically important plants such as, Campomanesia pubescens (Myrtaceae) (Torezan-Silingardi & Del-Claro 1998, Gressler et al 2006), Chamaecrista debilis (vogel) Irwin & Barneby (Fabaceae-Caesalpiniaceae) (Nascimento & Del-Claro 2007), Adenocalymma bracteatum (Bignoniaceae) (Almeida-Soares et al 2010), achiote Bixa orellana L. (Bixaceae) (Almeida & Pinheiro 1992), Brazil nut Bertholletia excelsa H.B.K. (Lecythidaceae) (Maués 2002), guava Psidium guajava L. (Myrtaceae) (Boti 2001), and sweet passion-fruit Passiflora alata Curtis (Passifloraceae) (varassin & Silva 1999).…”

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The importance of plant diversity in maintaining the pollinator bee, Eulaema nigrita (Hymenoptera: Apidae) in sweet passion fruit fields

Silva

Bordon

Rocha-Filho

et al. 2012

RBT

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Abstract:The euglossine bee Eulaema nigrita plays an important role for the pollination of native and economically important plants, such as the sweet passion-fruit Passiflora alata. E. nigrita uniquely collects the nectar from the flowers of P. alata, nevertheless, it needs to visit other plants to collect pollen, nectar and other resources for its survival. There are two methods to identify the species of plants used by bees in their diet: by direct observation of the bees in the flowers, and through identification of pollen grains present in brood cells, feces, or in the bees' body. In order to identify the other plants that E. nigrita visits, we analyzed samples of pollen grains removed from the bee's body in the course of the flowering period of P. alata. Among our results, the flora visited by E. nigrita comprised 40 species from 32 genera and 19 families, some of them used as a pollen source or just nectar. In spite of being a polyletic species, E. nigrita exhibited preference for some plant species with poricidal anthers. P. alata which has high sugar concentration nectar was the main source of nectar for this bee in the studied area. Nonetheless, the pollinic analysis indicated that others nectariferous plant species are necessary to keep the populations of E. nigrita. Studies such as this one are important since they indicate supplementary pollen-nectar sources which must be used for the conservation of the populations of E. nigrita in crops neighbouring areas. In the absence of pollinators, growers are forced to pay for hand pollination, which increases production costs; keeping pollinators in cultivated areas is still more feasible to ensure sweet passion fruit production. Rev. Biol. Trop. 60 (4): 1553-1565. Epub 2012 December 01.

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Technique for the identification of osmophores in flowers of herbarium material (TIOFH)

Hernández

Katinas

2019

Protoplasma

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The histochemical studies that search for osmophores differ in the protocol they follow for fixation and discoloration of the samples, and also in the type and number of stains utilized. Despite these differences, all the studies have one point in common: the use of fresh material either collected directly in the field or cultivated in botanical gardens and greenhouses. This is an obvious limitation for the studies of osmophores. Flower parts of herbarium specimens of different dates of collection and different plant families were exposed to variable times and percentages of discoloration agents and under different stains for finding if it is possible to positively test osmophores in this type of material. We obtained positive results discoloring the samples with ethyl alcohol 96°and sodium hypochlorite, and staining with Lugol, Oil Red O, and Neutral Red (TIOFH). A protocol (TIOFH3) for osmophore testing that combines these three stains into a single procedure is proposed.

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Pollination of Adenocalymma bracteatum (Bignoniaceae): floral biology and visitors

Cited by 17 publications

References 49 publications

Influência dos Fatores Ambientais e da Quantidade de Néctar na Atividade de Forrageio de Abelhas em Flores de Adenocalymma bracteatum (Cham.) DC. (Bignoniaceae)

Influência dos Fatores Ambientais e da Quantidade de Néctar na Atividade de Forrageio de Abelhas em Flores de Adenocalymma bracteatum (Cham.) DC. (Bignoniaceae)

The importance of plant diversity in maintaining the pollinator bee, Eulaema nigrita (Hymenoptera: Apidae) in sweet passion fruit fields

Technique for the identification of osmophores in flowers of herbarium material (TIOFH)

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