A new giant Vellozia (Velloziaceae) from Minas Gerais, Brazil with comments on the V. compacta complex and conservation

Alves, Ruy José Válka; Guimarães, Alessandra Ribeiro; Rezende, Claudia de Moraes; Braga, Laura Di Spirito; Silva, Nílber Gonçalves da

doi:10.11646/phytotaxa.172.1.2

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…The taxonomic value of these glands has been highlighted by Mello-Silva (1995). Although there are a number of studies that focus on the taxonomy, reproductive biology and floral anatomy of the Velloziaceae species (Mello-Silva 1995, 2004, 2005Alves et al 2014b;Sazima and Sazima 1990;Jacobi and Del Sarto 2007;Menezes 1973Menezes , 1980Menezes , 1988, none have investigated the morphology, anatomy and ultrastructure of these glands, nor have the nature and possible functions of their exudates been discussed.…”

Section: Introductionmentioning

confidence: 99%

Oil-resin glands in Velloziaceae flowers: structure, ontogenesis and secretion

et al. 2016

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Many Velloziaceae flowers present conspicuous glands, whose taxonomic value has already been highlighted. However, until now, their micromorphology, anatomy and ultrastructure have not been investigated, nor have the natures and possible functions of their exudates. Our aim was to investigate distribution, ontogenesis, structure, and secretion mechanisms of glands of Barbacenia flava and Vellozia intermedia and to discuss their possible ecological functions. Samples were prepared according to standard methods for investigations of plant anatomy, scanning electron microscopy, and transmission electron microscopy. Histochemical tests were performed, and focal field observations were made in the study site. The capitate stalked glands on the pedicel, tepals and hypanthium are covered by a sticky secretion that is released in the gland head through the outer periclinal cell walls and cuticle. Secretions are produced in the epidermal and subepidermal cells that contain structural components typical of mixed, mainly lipophilic secretions. Bacteria were found inside the oil-resin gland cells of both species. The Meliponina bees Trigona spinipes and Tetragonisca angustula were observed collecting resin from both species, but were not involved in pollination. Our observations clearly indicate that flower glands of B. flava and V. intermedia are oil-resin secreting and remain active in secretion from very young buds, through to immature fruit. New, smaller glands replace senescent glands by divisions near the base of the original stalk cells. Oil-resin glands have a number of different, but important functions, including the interaction with Meliponina bees, protection against water loss and high temperatures by ultraviolet screening, and anti-desiccant properties.

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Section: Introductionmentioning

confidence: 99%

Oil-resin glands in Velloziaceae flowers: structure, ontogenesis and secretion

et al. 2016

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“…Following revision of Neotropical members of the family (Smith & Ayensu 1976), several new species have been described (Smith & Ayensu 1979, Smith 1985a,b, 1986, Menezes 1980a, Menezes & Semir 1991, Mello-Silva & Menezes 1988, 1999a,b, Mello-Silva 1991a, 1993, 1994, 1996, 1997, in press, Alves 1992, 2002, Alves et al 2014, Ibisch et al 2001, probably indicating a large number of species yet to be discovered. Factors that led to this result are the restricted distribution of most of the species and the difficulty of accessing large areas of central Brazil (Mello-Silva & Menezes 1999a).…”

Section: Introductionmentioning

confidence: 99%

Velloziaceae in honorem appellatae

Mello‐Silva

Menezes

2014

Phytotaxa

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Four new species of Vellozia are described and named after people linked to Velloziaceae and Brazilian botany. Vellozia everaldoi, V. giuliettiae, V. semirii and V. strangii are endemic to the Diamantina Plateau in Minas Gerais, Brazil. Vellozia giuliettiae and V. semirii are small species that share characteristics that would assign them to Vellozia sect. Xerophytoides, which include an ericoid habit with no leaf furrows and six stamens. Vellozia everaldoi, although a small, ericoid species, could not be placed in that section because it has conspicuous furrows, although it is considered closely related to species of that section. The fourth species, V. strangii, is a relative large species closely related to V. hatschbachii. Descriptions and illustrations of the species are followed by a discussion of their characteristics and putative relationships.

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Depicting Barbacenia flava and Vellozia intermedia with a short history of illustrated Velloziaceae

Mello‐Silva

Montserrat

2015

Kew Bull

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A new giant Vellozia (Velloziaceae) from Minas Gerais, Brazil with comments on the V. compacta complex and conservation

Cited by 6 publications

References 23 publications

Oil-resin glands in Velloziaceae flowers: structure, ontogenesis and secretion

Oil-resin glands in Velloziaceae flowers: structure, ontogenesis and secretion

Velloziaceae in honorem appellatae

Depicting Barbacenia flava and Vellozia intermedia with a short history of illustrated Velloziaceae

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