Reproductive biology and pollination mechanisms of<i>Epidendrum secundum</i>(Orchidaceae). Floral variation: a consequence of natural hybridization?

Pansarin, Emerson Ricardo; Amaral, Maria do Carmo Estanislau do

doi:10.1111/j.1438-8677.2007.00025.x

Cited by 60 publications

(89 citation statements)

References 34 publications

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“…Em Chiapas, no México, C. micranthum floresce entre abril e maio, e em novembro (Damon & Salas-Roblero 2007). A ocorrência de diferenças nos períodos de floração é comum em espécies de ampla distribuição e tem sido documentada para orquídeas que ocorrem desde a América Central até o interior do estado de São Paulo (Pansarin & Amaral 2008;Aguiar et al 2012).…”

Section: Discussionunclassified

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Biologia reprodutiva de Campylocentrum micranthum (Orchidaceae, Angraecinae)

Cabral

Pansarin

2016

Rodriguésia

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ResumoCampylocentrum micranthum é uma espécie amplamente distribuída pelo Brasil. A biologia reprodutiva de C. micranthum foi estudada no município de São Simão, no noroeste do estado de São Paulo. A vegetação da região é caracterizada por florestas semideciduais, matas palustres e cerrado. Na área de estudo C. micranthum floresce no verão. A população estudada é formada por mais de 35 indivíduos distribuídos em uma área de mata palustre. As plantas são epífitas, e as flores são ressupinadas e de coloração creme. Cada flor possui um nectário tubuloso na base que produz em média 0,053 µL de néctar. As atividades dos polinizadores se iniciam por volta das 07:30 e as visitas se estendem até 13:00 h. Os polinizadores de C. micranthum são abelhas dos gêneros Lophopedia e Ceratina. A espécie autocompatível e não autógama. No entanto, necessita de polinizadores para a transferência de pólen. Nos experimentos de polinização cruzada à formação de frutos foi de 3,17%, enquanto no tratamento de autopolinização manual foi obtido 16% de frutificação. Em condições naturais a taxa de frutificação foi de 36,4%. Palavras-chave: Angraecinae, biologia reprodutiva, Campylocentrum, Orchidaceae, polinização. AbstractCampylocentrum micranthum is widely distributed throughout Brazil. The reproductive biology of C. micranthum was studied in the municipality of São Simão, state of São Paulo, Brazil. The vegetation of the region is characterized by semi-deciduous forests, swamp forests and cerrado. In the study area, C. micranthum blooms in summer. The study population consists of more than 35 individuals distributed in a swamp forest area. The plants are epiphytes and the flowers are resupinate and creamy in colour. Each flower has a tubular nectary at the base of the labellum that produces 0.053 µL of nectar on average. The activity of the pollinator on flowers occurs from 07:30 to 13:00. The pollinators of C. Micrantum are bees of the genera Lophopedia and Ceratina. Campylocentrum micranthum is self-compatible, but dependent on a biotic pollinator for pollen transference. In the treatment of cross-pollination, fruit set was 3.17%, while in the experiment of manual self-pollination 16% fructification was recorded. Under natural conditions (open pollination) fruit set was 36.4%.

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Section: Discussionunclassified

“…(e.g., Mickeliunas et al 2006;Pansarin et al 2006;Pansarin 2008;Pansarin & Amaral 2008). Estudos têm mostrado que orquídeas, cujas flores oferecem néctar como recurso apresentam maior sucesso reprodutivo em relação às espécies que produzem qualquer outro tipo de recurso ou são polinizadas por engano (Tremblay et al 2005).…”

Section: Discussionunclassified

Biologia reprodutiva de Campylocentrum micranthum (Orchidaceae, Angraecinae)

Cabral

Pansarin

2016

Rodriguésia

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“…Epidendrum secundum is visited by butterflies in South America, which are presumed to be its principal pollinators (Pansarin and Amaral, 2008).…”

Section: Figure 25imentioning

confidence: 99%

Flora of Guaramacal (Venezuela): Monocotyledons

Dorr¹

2014

Smithsonian Contributions to Botany

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Smithsonian Institution Scholarly PressSmithsonian Institution Scholarly Press s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 0 Smithsonian Institution Scholarly Press Smithsonian Institution Scholarly Press Flora of Guaramacal (Venezuela): Monocotyledons L. J. Dorr SERIES PUBLICATIONS OF THE SMITHSONIAN INSTITUTIONEmphasis upon publication as a means of "diffusing knowledge" was expressed by the first Secretary of the Smithsonian. In his formal plan for the Institution, Joseph Henry outlined a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This theme of basic research has been adhered to through the years by thousands of titles issued in series publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: In these series, the Institution publishes small papers and full-scale monographs that report on the research and collections of its various museums and bureaus. The Smithsonian Contributions Series are distributed via mailing lists to libraries, universities, and similar institutions throughout the world.Manuscripts submitted for series publication are received by the Smithsonian Institution Scholarly Press from authors with direct affiliation with the various Smithsonian museums or bureaus and are subject to peer review and review for compliance with manuscript preparation guidelines. General requirements for manuscript preparation are on the inside back cover of printed volumes. For detailed submissions requirements and to review the "Manuscript Preparation and Style Guide for Authors," visit the Submissions page at www.scholarlypress.si.edu. s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 0 Includes bibliographical references and index.

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“…Brownlea coerulea, B. macroceras and B. parviflora, [25], Epidendrum secundum [26], Epipactis consimilis [27], Habenaria paviflora [28] and Holcoglossum rupestre [29].…”

Section: Biological Implicationsunclassified

An assessment of factors leading to the decline of Beclardia macrostachya (orchidaceae) population in Mauritius

Bhoyroo¹,

Puchooa²,

Sanmukhiya³

et al. 2013

ABB

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Clearing of forest land for agriculture and urbanization following colonization have reduced the forest cover in Mauritius to 3% of total land cover. Today exotic species such as Psidium cattleianum (wild guava), Araucaria columnaris, and Ravenala madagascarensis dominate at Pigeon Wood, the only site in Mauritius where Beclardia can be found, leaving little space for very few indigenous tree species like Labourdonnaisia glauca, Apholoia theiformis and Foetida mauritiana. Beclardia macrostachya is an orchid endemic to Mauritius, Madagascar and Reunion. Though it is abundant in the latter countries, it is one of the rarest orchids in Mauritius. An assessment of the factors associated with the stability of this orchid was carried out in forests of these three countries to understand the drastic decline of this orchid in Mauritius. Morphometric and fertility counts carried out at different forests revealed differences in fitness and fertility rates among forests of the same countries and between different countries. Stability of the different Beclardia populations was carried out based on counts of juveniles and adults. Higher fertility rates and most stable populations were observed in the forests of Reunion Island (Bebours) and Madagascar (Ambohitanteley), whereas very low fruit set were observed in Mauritius, unless manual pollination was carried out. Microscopic analysis revealed the presence of pelotons of endomycorrhiza during the early development of the seedlings, in vivo. Based on comparative studies among the different sites, pollinator limitation and absence of suitable hosts were the primary factors that led to the present decline in Mauritius. The high density of wild guava, Psidium cattleianum, which has slowly taken up most of the forest areas in Mauritius has affected the regenerating capacity of Beclardia macrostachya and the density of putative hosts of this orchid. GC-MS/MS analysis of nectar revealed α-Dglucopyranose to be the primary reward of the pollinators and benzyl alcohol, methoxybenzyl alcohol and methoxy methyl phenol to be components floral fragrance.

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Reproductive biology and pollination mechanisms ofEpidendrum secundum(Orchidaceae). Floral variation: a consequence of natural hybridization?

Cited by 60 publications

References 34 publications

Biologia reprodutiva de Campylocentrum micranthum (Orchidaceae, Angraecinae)

Biologia reprodutiva de Campylocentrum micranthum (Orchidaceae, Angraecinae)

Flora of Guaramacal (Venezuela): Monocotyledons

An assessment of factors leading to the decline of Beclardia macrostachya (orchidaceae) population in Mauritius

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