Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

Matias, Lígia Queiroz; Soares, Arlete A.; Scatena, Vera Lúcia

doi:10.1016/j.flora.2007.04.002

Cited by 12 publications

(15 citation statements)

References 14 publications

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“…Thus, there is a similarity in the pattern of the scape inner structure among those species. Additionally, the anatomical structures of the scapes of Echinodorus lanceolatus, E. paniculatus and representatives of Wiesneria are similar to those seen in the petiole (Stant, 1964;Tomlinson, 1982;Matias et al, 2007).…”

Section: Discussionmentioning

confidence: 88%

Anatomy of Echinodorus (Alismataceae) Scapes From Northeastern Brazil as Applied to Taxonomy

2008

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The anatomical characters of the scape of Echinodorus glandulosus, E. lanceolatus, E. palaefolius, E. paniculatus, E. pubescens and E. subalatus subsp. subalatus (Alismataceae) were examined. These six sympatric species occur in northeastern Brazil and demonstrate great morphological similarity. The aim of the present study was to identify anatomical characters of taxonomic importance. Scapes possess a uniseriate epidermis composed of thin-walled tabular cells. The scapes of most species have differentiated epidermis, cortex, and vascular cylinders. There are several layers of regular chlorenchyma cells immediately below the epidermis, intercalated with collateral vascular bundles, in all species. There are also laticiferous ducts throughout the scape, and aerenchyma in both the cortex and pith. The shape and outline of scapes, the presence and position of winged extensions, the absence of differentiated vascular cylinders or cortex, and the number of vascular bundles are important characters for differentiating species in Echinodorus. An identification key employing the features analysed is provided.

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Section: Discussionmentioning

confidence: 88%

Anatomy of Echinodorus (Alismataceae) Scapes From Northeastern Brazil as Applied to Taxonomy

2008

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“…No caso da reduzida lignificação, a água exerce a função de sustentação em alguns órgãos. No entanto, por serem anfíbias essas espécies apresentam maior lignificação nas paredes de suas células do que outras formas de vida de macrófitas aquáticas, como por exemplo, espécies aquáticas de Eriocaulaceae, Echinodorus (Alismataceae) e Ludwigia (Onagraceae) citados respectivamente por Coan et al (2002), Matias et al (2007) e Rodrigues et al (2007).…”

Section: Discussionunclassified

Anatomia de espécies anfíbias de Cyperaceae de lagoas do semi-árido, BA, Brasil

2009

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RESUMO -(Anatomia de espécies anfíbias de Cyperaceae de lagoas do semi-árido, BA, Brasil). Foi estudada a anatomia de raízes, rizomas, folhas e escapos de Cyperus odoratus L., Oxycaryum cubense (Poep. & Kunth) Lye e Pycreus macrostachyos (Lam.) Raynal (CyperaceaePoales) de lagoas do semi-árido da Bahia visando caracterizar anatomicamente as espécies e levantar estruturas adaptativas à forma de vida anfíbia. As espécies apresentam raízes com epiderme unisseriada, córtex com exoderme e lacunas de ar. Os rizomas apresentam feixes vasculares anfivasais ou colaterais no cilindro vascular. As folhas apresentam epiderme unisseriada, com células de parede periclinal externa mais espessada que a interna, estômatos somente na face abaxial, parênquima clorofiliano alternado com lacunas de ar e feixes vasculares colaterais. Os escapos apresentam epiderme unisseriada, feixes de fibras distribuídos perifericamente alternados com parênquima clorofiliano, lacunas de ar e feixes vasculares colaterais. Oxycaryum cubense difere de Cyperus odoratus e Pycreus macrostachyos por apresentar raízes com pêlos longos, rizomas e estolões com feixes vasculares colaterais, folhas com bordo agudo, e ausência de estrutura Kranz nas folhas e escapos. Características anatômicas como: lacunas de ar observadas principalmente nas raízes, células buliformes na face adaxial da epiderme foliar, hipoderme, reduzido número de elementos xilemáticos e pouca lignificação nas paredes celulares dos tecidos nos diferentes órgãos estudados são consideradas importantes na adaptação dessas plantas anfíbias às lagoas temporárias do semi-árido da Bahia. Palavras-chaves: anatomia ecológica, Cyperaceae, lagoas temporárias, Poales, semi-árido ABSTRACT -(Anatomy of amphibious Cyperaceae species from lakes in the semi-arid region of Bahia State, Brazil). We examined the anatomy of roots, rhizomes, leaves, and scapes of Cyperus odoratus L., Oxycaryum cubense (Poep. & Kunth) Lye, and Pycreus macrostachyos (Lam.) Raynal (Cyperaceae-Poales) from temporary lakes in the semi-arid region of Bahia in order to characterize the anatomy and examine structural adaptations to amphibious lifestyle. All species had roots with uniseriate epidermal cells, cortex with exoderm and air canals. The rhizomes had amphivasal or collateral vascular bundles in the vascular cylinder. The leaves had uniseriate epidermal cells with external periclinal cell walls thicker than the inner walls, stomata on the abaxial leaf surface, chlorenchyma alternating with air canals, and collateral vascular bundles. The scapes had uniseriate epidermal cells, fibrous groups distributed peripherally, alternating with chlorenchyma, air canals, and collateral vascular bundles. Oxycaryum cubense differs from Cyperus odoratus and Pycreus macrostachyos by having roots with long hairs; rhizomes and stolons with collateral vascular bundles; leaf blades with acute margins, and lacking Kranz structures in leaves and scapes. Anatomic characters such as the presence of large air canals principally in the roots, bulliform cel...

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“…Anatomy plays an important role in the taxonomy of many groups of plants (Morris, Stern & Judd, 1996; Hamidipour et al ., 2006; Matias, Soares & Vera Lúcia Scatena, 2007; Peruzzi et al ., 2008b; Gonzalez & Tarragó, 2009), particularly in monocotyledons (Gunawardena & Dengler, 2006; Zubaida et al ., 2008; Carlsward & Stern, 2009; Horn et al ., 2009; Stern & Carlsward, 2009). Anatomical characters have been useful in the taxonomy of Liliaceae sensu APG III (2009), particularly in Lilium and Tulipa (Ocak, Alan & Ataplar, 2004), although there is not an extensive literature on the anatomy of lilies and their allies.…”

Section: Introductionmentioning

confidence: 99%

The systematic importance of anatomical data in Gagea (Liliaceae) from the Flora Iranica area

Zarrei

Wilkin

Ingrouille

et al. 2010

Botanical Journal of the Linnean Society

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Anatomical features of basal leaves, pedicels and tepals of 22 species of Gagea belonging to four sections (Platyspermum, Plecostigma, Gagea and Didymobulbos) are investigated. Anatomical characters are mapped onto a molecular phylogenetic tree and their evolution is evaluated. The systematic importance of the anatomical characters is discussed. Anatomical characters are more systematically useful in the Irano-Turanian taxa than in Euro-Siberian taxa. The presence of collenchyma and/or sclerenchyma and the pentagonal outline of the transverse section of the basal leaf is found in Irano-Turanian taxa of section Platyspermum and is mostly absent in Euro-Siberian taxa. A diagnostic key based on combined anatomical characters is provided. The level of variation in anatomical characters is greater in the basal leaf than the pedicel and lowest in the tepals. Convergent evolution in anatomical characters is associated with ecological shifts between sunny, open, dry habitats and closed, humid habitats.

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Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

Cited by 12 publications

References 14 publications

Anatomy of Echinodorus (Alismataceae) Scapes From Northeastern Brazil as Applied to Taxonomy

Anatomy of Echinodorus (Alismataceae) Scapes From Northeastern Brazil as Applied to Taxonomy

Anatomia de espécies anfíbias de Cyperaceae de lagoas do semi-árido, BA, Brasil

The systematic importance of anatomical data in Gagea (Liliaceae) from the Flora Iranica area

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