Anatomia foliar como subsídio à taxonomia de espécies do Complexo Briza L. (Poaceae: Pooideae: Poeae)

Pelegrin, Carla Maria Garlet de; Longhi-Wagner, Hilda María; Oliveira, Paulo Luiz de

doi:10.1590/s0102-33062009000300006

Cited by 16 publications

(16 citation statements)

References 39 publications

(53 reference statements)

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“…Soderstrom and Ellis, 1987;Paisooksantivatana and Pohl, 1992;Yang et al, 2008;Gomes and Neves, 2009;Mota, 2013), but also for other closely related groups (e.g. Pelegrin et al, 2009). Our study is not able to define the value of this feature to the systematics of Olyreae and Bambuseae, therefore a detailed work to evaluate both distribution and type of papillae within different groups would be informative.…”

Section: Discussionmentioning

confidence: 99%

“…For this reason, searching for vegetative characters in addition to the reproductive ones is highly important to aid in species identification, and anatomical features often have provided useful findings (e.g. Brandis, 1907;Prat, 1936;Brown, 1958;Metcalfe, 1960;Calderón and Soderstrom, 1973;Renvoize, 1987;Vieira et al, 2002;Guglieri et al, 2008;Oliveira et al, 2008;Pelegrin et al, 2009;Jesus Junior et al, 2012;Viana et al, 2013a, b;Leandro et al, 2016;Aliscioni et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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The utility of Bambusoideae (Poaceae, Poales) leaf blade anatomy for identification and systematics

et al. 2016

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Bambusoideae is a diverse subfamily that includes herbaceous (Olyreae) and woody (Arundinarieae and Bambuseae) bamboos. Species within Bambusae are particularly difficult to identify due to their monocarpic lifecycle and the often long durations between mass flowering events; whereas the herbaceous bamboos are pluricarpic, but often are found with no reproductive structures. The leaf blade anatomy of 16 sympatric species of native Brazilian bamboos (Olyreae and Bambuseae) from the Atlantic Rainforest was studied in order to detect useful features for their identification. All the studied species share the following features: epidermis with a single stratum of cells; adaxial bulliform cells; mesophyll with arm cells, rosette cells, and fusoid cells; and collateral vascular bundles. Herbaceous bamboos share two features: papillae scattered on the abaxial surface and parallel-sided arrays of bulliform cells; whereas woody bamboos share: centrally organized papillae and fan-shaped arrays of bulliform cells. Also within the woody bamboos, intercostal fibers and a midrib with only one vascular bundle (simple midrib) characterize the subtribe Arthrostylidiinae; whereas a midrib with more than one vascular bundle (complex midrib) and a stomatal apparatus with two pappilae per subsidiary cell characterize the subtribe Chusqueinae. There are also diagnostic features for the sampled species, such as: papillae shape, and the outline and structure of the midrib. An identification key for all the studied species is provided based on the anatomical features.Keywords: Arthrostylidiinae, Bambuseae, Chusqueinae, leaf blade, Olyreae.A utilidade da anatomia da lâmina foliar para a identificação e sistemática de espécies de Bambuboideae (Poaceae, Poales) ResumoBambusoideae é uma subfamília que inclui diversas espécies de bambus herbáceos (Olyreae) e lignificados (Arundinarie e Bambuseae). Bambus lignificados geralmente apresentam dificuldades de delimitação e identificação, devido principalmente ao ciclo monocárpico e longa amplitude temporal entre florações; enquanto que bambus herbáceos possuem ciclo pluricárpico, porém frequentemente são encontrados em estágio vegetativo. Foi estudada a anatomia da lâmina foliar de 16 espécies de Bambusoideae (Olyreae e Bambuseae), simpátricas e nativas do Brasil, visando levantar caracteres úteis para sua identificação. Todos os táxons estudados compartilham: epiderme uniestratificada; células buliformes na face adaxial; mesofilo com células invaginantes, células em roseta e células fusoides; e feixes vasculares colaterais. Bambus herbáceos compartilham: papilas dispersas na face abaxial e grupos de células buliformes organizadas paralelamente; enquanto que bambos lignificados compartilham: papilas organizadas em colunas centrais e grupos de células buliformes em forma de leque. Ainda dentre os bambus lignificados, fibras intercostais e nervura central com apenas um feixe vascular (nervura central simples) caracterizam a subtribo Arthrostylidiinae; enquanto que nervura central com mais d...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The utility of Bambusoideae (Poaceae, Poales) leaf blade anatomy for identification and systematics

et al. 2016

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“…North America (Hitchcock 1951). Several authors have classified them into a Eurasian and a South American clade, based both on morphology, karyotype data and molecular data (Murray 1975, King 1986, Essi et al 2008, de Pelegrin et al 2009). There are, however, taxonomic disagreements, in particular regarding the South American species and whether they should be called Briza or if they should be assigned to one or several other genera.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies of the Briza complex have, however, focused exclusively on the phylogeny within the group itself, i.e. a taxonomically narrow but extensive sampling within the complex (King 1986, Bayón 1998, Essi et al 2008, de Pelegrin et al 2009. Other studies have addressed relationships within the subfamily Pooideae, using a taxonomically wide sampling but with few species representing each genus (Döring et al 2007, Quintanar et al 2007, Schneider et al 2009.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic relationships of the ‘Briza complex’ to other members of the subfamily Pooideae (Poaceae)

Persson¹,

Rydin²

2016

Plecevo

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Background and aims-The species of the 'Briza complex' (Pooideae, Poaceae) are distributed in South America and Eurasia. They are relatively well-studied morphologically and have a complex taxonomic history, but only a few phylogenetic studies have been conducted using molecular data. Monophyly of the complex, which is based on presence of 'brizoid' spikelets, has not been questioned and sampling strategies in previous studies have prevented assessments thereof. Methods-We investigate phylogeny and node ages in the Briza complex and test monophyly of the group using nuclear and chloroplast data. Extensive sampling from the Briza complex and putatively related species in the subfamily Pooideae is employed. Key results-Despite morphological similarity among species, the Briza complex is polyphyletic. Members were found in three different clades, showing the South American species, the Eurasian species and Briza humilis to be distinct groups. The South American and the Eurasian clades originated about 11 and 13 million years ago, respectively. Briza humilis diverged from Phleum (or a related genus) about 10 million years ago, whereas its crown clade is from the Pliocene-Pleistocene border. The almost simultaneous origins of these clades in the mid-Miocene coincide with temporal estimates of major diversification in grasses and formation of grassland habitats. Conclusions-Based on our results, we support the names Chascolytrum for the South American clade and Briza for the Eurasian clade. For the Briza humilis clade, we propose the name Brizochloa. The parallel evolution of (seemingly) similar 'brizoid' spikelets in the Pooideae is surprising; however, studies have shown that floral morphology can alter dramatically by one-step mutations, causing evolutionarily distantly related species to have similar appearance. Our findings may hopefully inspire new morphological investigations of the species of the former Briza complex, as well as other poorly studied and potentially polyphyletic genera, such as Deschampsia and Echinopogon.

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“…Su propuesta de clasificación, que es la seguida en el presente tratamiento, fue aceptada en mayor o menor grado por los autores posteriores (Nicora & Rúgolo de Agrasar, 1981;Bayón, 1998;Soreng, 2003), sin que hayan faltado ejemplos de lo contrario: Clayton & Renvoize (1986) reconocieron sólo Microbriza aparte del resto de especies, reunidas todas en Briza. Más tarde, De Pelegrin et al (2009) publicaron diferencias adicionales referidas a la anatomía del limbo foliar de los táxones sudamericanos y euroasiáticos (forma de la sección transversal, disposición del esclerénquima, presencia o ausencia de células suberosas en la cara abaxial, así como la forma de los cuerpos de sílice). Hoy en día, la postura adoptada de modo más general es la de considerar un género Chascolytrum que agrupa los táxones sudamericanos frente a los eurasiáticos, reunidos en Briza s. str.…”

Section: Introductionunclassified

Revisión taxonómica del género <em>Briza (Poaceae)</em> en la Península Ibérica e Islas Baleares

2018

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Dedicatoria: A nuestro maestro y buen amigo Javier Fernández Casas, siempre atento y generoso, ejemplo de labor infatigable en el campo, así como en los ámbitos de la taxonomía y la corología. AbstractTaxonomic revision of The genus Briza (Poaceae) in The iberian Peninsula and balearic islands.-A taxonomic treatment for the species of Briza (Poaceae) in the Iberian Peninsula and Balearic Islands is provided, within the frame of Flora iberica project. This treatment is based on the revision of 2494 specimens from Spanish and European herbaria, and the comparative study of morphological characters of 112 specimens kept at MA, by means of the analysis of biometric variables. The final taxonomical treatment recognizes up to three species for the aforementioned territories. Besides of morphological diagnosis, additional information about chorology, ecology, chromosome number, identification key, and the illustration of Briza media are provided.Key words: Briza; chorology; chromosome number; Iberian flora; identification key; Poaceae; systematics.Resumen revisión Taxonómica del género Briza (Poaceae) en la Península ibérica e islas baleares.-Se presenta un tratamiento taxonómico para las especies del género Briza (Poaceae) en la Península Ibérica e Islas Baleares, en el ámbito del proyecto Flora iberica. Este tratamiento se fundamenta en la revisión de 2494 especímenes que proceden de diversos herbarios, tanto españoles como del resto de Europa, y en el estudio comparativo de caracteres morfológicos asociados a 112 especímenes conservados en MA, mediante el análisis de variables biométricas. Reconocemos un total de tres especies en el territorio mencionado. Además de las descripciones morfológicas, se incluye información adicional sobre su distribución, hábitat y número cromosomático, además de una clave para la determinación de las especies tratadas y una ilustración de Briza media.Palabras clave: Briza; clave de determinación; corología; flora ibérica; número cromosomático; Poaceae; sistemática. Cómo citar este artículo / CitationIsabel, M., Quintanar, A. & Medina, L. 2018. Revisión taxonómica del género Briza (Poaceae) en la Península Ibérica e Islas Baleares. Collectanea Botanica 37: e004. https://doi

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Anatomia foliar como subsídio à taxonomia de espécies do Complexo Briza L. (Poaceae: Pooideae: Poeae)

Cited by 16 publications

References 39 publications

The utility of Bambusoideae (Poaceae, Poales) leaf blade anatomy for identification and systematics

The utility of Bambusoideae (Poaceae, Poales) leaf blade anatomy for identification and systematics

Phylogenetic relationships of the ‘Briza complex’ to other members of the subfamily Pooideae (Poaceae)

Revisión taxonómica del género <em>Briza (Poaceae)</em> en la Península Ibérica e Islas Baleares

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