Fenologia reprodutiva, biologia floral e polinizadores de duas espécies simpátricas de Marantaceae em um fragmento de Floresta Atlântica, Nordeste do Brasil

Leite, Ana Virgínia; Machado, Isabel Cristina

doi:10.1590/s0100-84042007000200007

Cited by 5 publications

(5 citation statements)

References 19 publications

(33 reference statements)

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“…Many of the bee species presented in this study as floral visitors and potential pollinators of Brazil nut are widespread in the Amazon region, and some of them also occur in other Brazilian ecosystems [23][24][25]. Some of these bee species were also reported in the literature interacting with other plant species and constitute important floral visitors or even pollinators.…”

Section: Discussionmentioning

confidence: 87%

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Pollination Requirements and the Foraging Behavior of Potential Pollinators of Cultivated Brazil Nut (Bertholletia excelsaBonpl.) Trees in Central Amazon Rainforest

Cavalcante

Oliveira

Maués

et al. 2012

Psyche: A Journal of Entomology

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This study was carried out with cultivated Brazil nut trees (Bertholletia excelsaBonpl., Lecythidaceae) in the Central Amazon rainforest, Brazil, aiming to learn about its pollination requirements, to know the floral visitors of Brazil nut flowers, to investigate their foraging behavior and to determine the main floral visitors of this plant species in commercial plantations. Results showed thatB. excelsais predominantly allogamous, but capable of setting fruits by geitonogamy. Nineteen bee species, belonging to two families, visited and collected nectar and/or pollen throughout the day, although the number of bees decreases steeply after 1000 HR. Only 16, out of the 19 bee species observed, succeeded entering the flower and potentially acted as pollinators. However, due to the abundance, flower frequency and foraging behavior of floral visitors, it was concluded that only the speciesEulaema mocsaryiandXylocopa frontaliscould be considered relevant potential pollinators.

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Section: Discussionmentioning

confidence: 87%

“…Eulaema cingulata is a pollinator to Ischnosiphon gracilis (Rudge) Koern (Marantaceae) and floral visitor of Solanum stramonifolium Jacq. (Solanaceae) in a fragment of the Atlantic Forest in NE, Brazil [23,24]. Vilhena and Augusto [25] identified Ep.…”

Section: Discussionmentioning

confidence: 99%

Pollination Requirements and the Foraging Behavior of Potential Pollinators of Cultivated Brazil Nut (Bertholletia excelsaBonpl.) Trees in Central Amazon Rainforest

Cavalcante

Oliveira

Maués

et al. 2012

Psyche: A Journal of Entomology

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“…Phenological patterns are inherent characteristics of species in the biotic and abiotic relations present in ecosystems (Pires et al, 2016). The annual pattern is common to many tropical species found in Atlantic Forest habitats (Newstrom et al, 1994, Leite and Machado, 2007), although Dórea (2018) pointed out the dearth of studies of herbaceous species of the forest understory.…”

Section: Resultsmentioning

confidence: 99%

“…Forest areas are scarce (Barreto and Freitas, 2007;Leite and Machado, 2007;Sigrist and Sazima, 2015;D orea, 2018). Floral and reproductive biology studies of plants of the family Commelinaceae have reported awide variety of floral morphology among the genera (Evans et al, 2003;Kaul and Koul, 2008;Aona et al, 2011Aona et al, , 2014Aona et al, , 2016Aona et al, , 2022.…”

Section: Phenological Studies Of Herbaceous Species In Brazilian Atla...mentioning

confidence: 99%

Phenology, floral and reproductive biology of Dichorisandra rhizantha Aona (Commelinaceae), an endemic endangered species in an Atlantic Forest fragment

JÚNIOR

Souza

Costa

et al. 2023

Microscopy Res & Technique

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Commelinaceae is an important component of the Atlantic Forest and its analysis can provide information on the conservation of that species. This study had the objective of analyzing the phenology and floral and reproductive biology of Dichorisandra rhizantha, growing in an Atlantic Forest fragment, to obtain data related to the form of reproduction and pollination mechanism of this species. We monitored the phenophases and reproductive biology of the D. rhizantha in the area studied using different methodologies and microscopy techniques (LM, SEM and FM). The flowering period occurs during the dry season. The species is andromonoecious and has daytime anthesis (4:30 a.m.-1:30 p.m.). It has purple zygomorphic flowers and rimose but functionally poricidal anthers. The pollen viability was 97.6% and the two floral morphs investigated contained a large quantity of pollen grains. The time of greatest stigma receptivity (anthesis) coincided with the pollen viability. Cross-pollination was the only efficient reproductive system of the species, with observation of gametophytic self-incompatibility and pollen tubes growth only as far as the middle or lower third of the pistil. We observed bee species of the genera Xylocopa and Euglossa visiting the flowers and acting as effective pollinators. The immature fruits were formed after about 3.25 ± 1 days, and the presence was noted of ants of the genus Cephalotes acting as dispersers of the seeds, with aril serving as the reward. Although the natural reproductive system is efficient, D. rhizantha is endangered, mainly due to fragmentation of habitat caused by deforestation and urban encroachment.

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“…There are alternative explanations for the singleseed pattern. Since style movement is irreversible, and each blossom only has a single chance of being pollinated, it is possible that some pollinators do not have pollen on their bodies during visits (Leite & Machado 2007). Consequently, the mechanism is triggered, but the stigma may not receive any pollen and the ovule cannot be fertilized.…”

mentioning

confidence: 99%

Thalia geniculata L. (MARANTACEAE): A PLANT THAT PRODUCES A PSEUDANTHIUM WITH TWO FLOWERS, TWO OVARIES BUT JUST ONE FRUIT

et al. 2019

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Thalia geniculata L. (Zingiberales, Marantaceae) has inflorescences with two simultaneously opening, hermaphroditic, single-day flowers, which form a pseudanthium. The species has an irreversibly explosive pollination mechanism. In one population of T. geniculata we verified that in 98.5% of the pseudanthia, only one flower from each pair set fruit. We assessed whether this fruit-set pattern could be linked to pollinator behavior, testing if pollinators only visit one flower in each pseudanthium, which would decrease visitation probability of the other flower in the pseudanthium. In the morning, less flowers were visited than in the afternoon, and we observed higher pollinator activity in the afternoon. In the morning, most of the visited pseudanthia had only one flower visited, while in the afternoon most pseudanthia had both flowers visited, the opposite of what we predicted. We concluded that single fruit set in the pseudanthia is not caused by pollinator behavior. It might be caused by pollen limitation during pollinator visits or even resource limitation to support two fruits per pseudanthia.

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Fenologia reprodutiva, biologia floral e polinizadores de duas espécies simpátricas de Marantaceae em um fragmento de Floresta Atlântica, Nordeste do Brasil

Cited by 5 publications

References 19 publications

Pollination Requirements and the Foraging Behavior of Potential Pollinators of Cultivated Brazil Nut (Bertholletia excelsaBonpl.) Trees in Central Amazon Rainforest

Pollination Requirements and the Foraging Behavior of Potential Pollinators of Cultivated Brazil Nut (Bertholletia excelsaBonpl.) Trees in Central Amazon Rainforest

Phenology, floral and reproductive biology of Dichorisandra rhizantha Aona (Commelinaceae), an endemic endangered species in an Atlantic Forest fragment

Thalia geniculata L. (MARANTACEAE): A PLANT THAT PRODUCES A PSEUDANTHIUM WITH TWO FLOWERS, TWO OVARIES BUT JUST ONE FRUIT

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