Nomenclatural Alterations in Microlicieae (Melastomataceae)

Koschnitzke, Cristiana; Martins, Angela Borges

doi:10.3417/1055-3177(2007)17[472:naimm]2.0.co;2

Cited by 12 publications

(7 citation statements)

References 6 publications

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“…The development of the anther wall found in Microlicia is of the basic type, as well as found in Chaetostoma and Lavoisiera species (J. F. Lima in preparation) which have close affinities with Microlicia (Almeda & Martins ; Koschnitzke & Martins ). Although up to now the development of the anther wall in Melastomataceae have been reported as dicotyledonous (Medeiros & Morretes ; Medeiros & Roos ) and monocotyledonous types (Cortez et al.…”

Section: Discussionmentioning

confidence: 55%

“…In the latter, polysporangiate anthers have been recorded in at least 50 species of Microlicia (Baumgratz et al. ; Almeda & Martins ; Rodrigues ; Koschnitzke & Martins ; Martins et al. ; Woodgyer & Zappi ; Romero & Woodgyer 2011; Almeda & Martnis ; Pataro et al.…”

Section: Introductionmentioning

confidence: 99%

“…In Myrtales, these anthers occur in Penaeaceae (Tobe & Raven 1984), Onagraceae (Tobe & Raven 1986;Endress & Stumpf 1990) and Melastomataceae (Baumgratz et al 1996). In the latter, polysporangiate anthers have been recorded in at least 50 species of Microlicia (Baumgratz et al 1996;Almeda & Martins 2001;Rodrigues 2005;Koschnitzke & Martins 2007;Martins et al 2009;Woodgyer & Zappi 2009;Romero & Woodgyer 2011;Almeda & Martnis 2012;Pataro et al 2013;Romero & Woodgyer 2014;Pataro et al 2017;Diniz & Silva 2018;Romero & Woodgyer 2018).…”

Section: Introductionmentioning

confidence: 99%

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Polysporangiate anthers in Microlicia D.Don (Melastomataceae Juss.)

2018

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Polysporangiate anthers are found in a small number of Microlicia species, a genus of Melastomataceae with a large number of endemic species in Brazil. This study describes for the first time the processes of formation and degeneration of the septa found in these particular anthers of Microlicia, providing relevant information about the structure and the functional role of septate anthers in the genus, which is an uncommon condition in angiosperms. The formation of septa begins when some initial cells enlarge and differentiate into sporogenous tissue, while other, more peripheral cells, are not affected by this increase and form the parenchymatous septum. The septa are present up until microgametogenesis, degenerating after the formation of the pollen grains. The mechanism of pollen release in stages, as suggested previously by some authors, could not be demonstrated for the studied species since the septa degenerated at flower anthesis. Thus, we propose that the transverse septa present during the formation of the sporogenous tissue and microspores are associated with providing better nutritional conditions for pollen development.

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Section: Discussionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polysporangiate anthers in Microlicia D.Don (Melastomataceae Juss.)

2018

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“…In several species of Microlicia, short-stalked glandular trichomes occur into depressions on the leaf surface, which are commonly reported as glandular punctations (Wurdack 1981(Wurdack , 1983. Although not all species of Microlicia studied here have such glandular punctations, this character has already been pointed out as diagnostic for this genus (Dahlgren & Thorne 1984;Koschnitzke & Martins 2007) and may be used to distinguish among the species. According to Wurdack (1986), these glandular trichomes are structures that resemble "unfurrowed sessile glands".…”

Section: Discussionmentioning

confidence: 59%

Leaf characters of Lavoisiera, Microlicia and Trembleya (Microlicieae, Melastomataceae) and their implications for taxonomy

2018

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In Microlicieae taxonomical delimitation of Lavoisiera, Microlicia and Trembleya is problematic. This study aims to fill this gap by identifying leaf characters that are useful for taxonomy of these genera. Species of Rhynchanthera were also included in this study for comparison, since it is an early‐diverging genus of the tribe. Diagnostic characters of Lavoisiera include sessile leaves with spongy parenchyma composed of isodiametric cells, and acute margins with supporting tissue. Trembleya is distinguished by petiolate, microphyllous, and hypostomatic leaves. The presence of depressions on the leaf surface and a homogeneous mesophyll is observed only in species of Microlicia. The leaf characters observed in Rhynchanthera, together with the available phylogenetic studies, were important to indicate evolutionary tendencies in the leaf structure within Microlicieae. Thus, our results indicate a tendency for reduction in leaf size within the tribe, in relation to both the petiole and the lamina. This reduction, which is more pronounced in Microlicia, results in a greater anatomical heterogeneity, due to variations in the organization of both vascular and fundamental tissues.

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“…Most of the species were tenuously delimited and morphological characteristics have frequently overlapped. In recent years some synonyms have been proposed (Romero 2003a;2013a;2013b) and eight species of Lavoisiera (Almeda & Martins 2001) and three of Chaetostoma (Koschnitzke & Martins 2007) were transferred to Microlicia.…”

Section: Introductionmentioning

confidence: 99%

Rediscovery of two species of Microlicia (Melastomataceae) in Minas Gerais, Brazil

Romero

Woodgyer

2014

Phytotaxa

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Studies carried out in Minas Gerais state have led to the rediscovery of Microlicia maximowicziana and M. riedeliana, known previously only by the type collections made 190 years ago by Ludwig Riedel. We present descriptions, comments on the affinities among closely related species and conservation assessments, as well as illustrations. Lectotypes for both species are designated and the varieties of M. maximowicziana are synonymised. ResumoEstudos conduzidos no estado de Minas Gerais permitiram a redescoberta de Microlicia maximowicziana e M. riedeliana, conhecidas anteriormente apenas pelas coleções tipo realizadas há mais de 190 anos por Ludwig Riedel. Apresentamos descrições, comentários sobre afinidades com espécies próximas, bem como o estado de conservação e ilustrações. São designados lectótipos para as duas espécies e as varidedades de M. maximowicziana são consideradas sinônimos.

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Nomenclatural Alterations in Microlicieae (Melastomataceae)

Cited by 12 publications

References 6 publications

Polysporangiate anthers in Microlicia D.Don (Melastomataceae Juss.)

Polysporangiate anthers in Microlicia D.Don (Melastomataceae Juss.)

Leaf characters of Lavoisiera, Microlicia and Trembleya (Microlicieae, Melastomataceae) and their implications for taxonomy

Rediscovery of two species of Microlicia (Melastomataceae) in Minas Gerais, Brazil

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