Aciotis, Acisanthera, Marcetia e Pterolepis (Melastomeae-Melastomataceae) no estado do Rio de Janeiro

Guimarães, Paulo José Fernandes; Silva, Marcus Felippe Oliveira da

doi:10.1590/2175-7860201465412

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…This taxonomic treatment was carried out according to the last phylogenetic of tribe Melastomateae (Michelangeli et al 2013, Guimarães et al 2019. We used taxonomic keys provided by Silva et al (2014) and Guimarães and Silva (2014) to distinguish species of Tibouchina s.s. and allied genera from Brazil. The map was elaborated using ArcGISsoftware 9.3 (ESRI 2008).…”

Section: Methodsmentioning

confidence: 99%

A new species of Pleroma (Melastomataceae) from Mantiqueira Range, Minas Gerais State, Brazil

Justino

Guimarães

Campos

et al. 2021

Hoehnea

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Pleroma eglanduliferum, Justino & P.J.F. Guim. sp. nov. a new species of Melastomataceae (Melastomateae) from the Atlantic Forest of Minas Gerais State, Brazil, is described and illustrated, with their affinities and diagnostic characters discussed. Pleroma eglanduliferum is closely related to P. heteromallum (D. Don) D. Don and P. tedescoi Meirelles, L. Kollmann & R. Goldenb.) P.J.F . Guim. & Michelang. by plant architecture, with quadrangular branches and similar leaf in shape and indument. However, they can be distinguished by the variation in the stamens morphology and sizes of bracteoles. Pleroma eglanduliferum must be included in Critically Endangered category, since it is known only from one population, in a restricted area.

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Section: Methodsmentioning

confidence: 99%

A new species of Pleroma (Melastomataceae) from Mantiqueira Range, Minas Gerais State, Brazil

Justino

Guimarães

Campos

et al. 2021

Hoehnea

Self Cite

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“…São plantas eretas, herbáceas, até 30 cm de altura, reconhecidas pela pilosidade avermelhada, densa e longa das folhas, as quais possuem ápice obtuso e são 5-nervadas (GUIMARÃES & SILVA, 2014). Guimarães & Silva (2014) assinalam a semelhança e a problemática com A. acuminifolia (Mart. ex DC) Triana, que possui distribuição ao norte do Brasil.…”

Section: Introductionunclassified

Morfoanatomia foliar de Aciotis paludosa (Mart. ex DC.) Triana (Melastomataceae)

Aoyama

Ribeiro²,

Indriunas³

2017

ABC

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O trabalho teve como objetivo realizar um estudo sobre a morfoanatomia foliar de Aciotis paludosa (Mart. ex DC.) Triana proveniente da Estação Biológica de Santa Lúcia, Santa Teresa (ES). Para as análises morfoanatômicas utilizaram-se folhas adultas, retiradas do segundo e terceiro nós, sendo selecionadas amostras do terço médio do limbo e do pecíolo. Os caracteres morfológicos foram analisados, e empregaram-se técnicas usuais para estudos de histologia vegetal. Os resultados mostraram que as folhas são opostas cruzadas; anisofílicas, com limbo elíptico, membranáceo, ápice obtuso, base cuneada, margem irregularmente serreada, venação acródroma basal proeminente na face abaxial, com presença de emergências. Em vista frontal, as células epidérmicas apresentam formato retangular ou quadrangular, emergências na face adaxial e na margem e estômatos anisocíticos na face abaxial. A nervura mediana é côncavo-convexa. O sistema vascular está disposto na forma de um arco central aberto. O mesofilo é dorsiventral. O pecíolo tem superfície adaxial sulcada ou em cunha e a abaxial convexa, com epiderme uniestratificada, subepidermicamente ocorre colênquima angular. Os dados obtidos proveem subsídios para a melhor compreensão dessa complexa tribo, ainda pouco estudada em relação à anatomia.

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Towards a new understanding of the division of labour in heterantherous flowers: the case ofPterolepis glomerata(Melastomataceae)

Telles

Klunk

Maia

et al. 2020

Biological Journal of the Linnean Society

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Pollen-flowers with heteromorphic stamens have been shown to promote an intrafloral division of labour as a solution to fitness costs arising from pollen consumption by bees, known as the pollen dilemma. Usually, the division is based on morphological differences in anther and pollen traits that correlate with stamen function: pollinating anthers are larger and contain more and higher-quality pollen grains than feeding anthers. Here, we present a new strategy based on a high investment in reward production and thus attraction, in the heterantherous Pterolepis glomerata, to overcome short flower longevity and maintain reproductive success. In P. glomerata small feeding anthers not only produced more pollen grains and more grains with cytoplasmic content, but also released more pollen than pollinating anthers after a single visit. This pattern was consistent until the end of floral anthesis, showing the existence of pollen-dosing mechanisms. Bees equally visited flowers with yellow feeding anthers and pollinating anthers with yellow connective appendages, indicating a visual similarity, as predicted by bee vision modelling. Our results demonstrate that the division of labour might have different outcomes. Instead of the classical expectation of more investment in reproductive pollen in pollinating stamens, P. glomerata invested more in attraction and reward in feeding stamens.

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Aciotis, Acisanthera, Marcetia e Pterolepis (Melastomeae-Melastomataceae) no estado do Rio de Janeiro

Cited by 4 publications

References 25 publications

A new species of Pleroma (Melastomataceae) from Mantiqueira Range, Minas Gerais State, Brazil

A new species of Pleroma (Melastomataceae) from Mantiqueira Range, Minas Gerais State, Brazil

Morfoanatomia foliar de Aciotis paludosa (Mart. ex DC.) Triana (Melastomataceae)

Towards a new understanding of the division of labour in heterantherous flowers: the case ofPterolepis glomerata(Melastomataceae)

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