Morphoanatomy of the stem in Cyperaceae

Rodrigues, Ana Cláudia; Estelita, Maria Emília Maranhão

doi:10.1590/s0102-33062009000300030

Cited by 25 publications

(23 citation statements)

References 48 publications

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“…For the Neotropical area, besides the taxonomic studies and new species described in Hypolytrum and Mapania, which is the only closely related genus that also occurs on the American continent (Koyama 1969(Koyama , 1970Simpson 1992Simpson , 1996Alves 2003;Alves et al 2002aAlves et al , 2002bAlves et al , 2004, important morphological evidence, evolutionary interpretations and information about diversity and geographical distribution have been published (Koyama 1966;Alves et al 2000Alves et al , 2002cAlves et al , 2003Alves et al , 2009Alves et al , 2014Coan et al 2008Coan et al , 2010Rodrigues & Estelita 2009;Silva et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species

2015

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Abstract(Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species.) Hypolytrum (Mapanioideae) is a medium-size and Pantropical genus of Cyperaceae, closely related to Mapania, Principina, and Scirpodendron. In the Neotropics, it is found from southern Mexico to southern Brazil where it grows in the Atlantic and Amazon Forests and Cerrado vegetation. Most of the species are found in the humid and shady understory of forested habitats. Twenty-nine species are confirmed, nine of which are considered narrow-endemics and one is poorly known. Twelve species are classified under the conservation status of Critically Endangered or Vulnerable. A total of 130 types (holotypes, isotypes, lectotypes and isolectotypes) and 42 photos of types were checked and confirmed, and 22 synonyms were verified and accepted. Information about geographic distribution including new occurrences, habitat and diagnostic characters are also provided.

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Section: Introductionmentioning

confidence: 99%

Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species

2015

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“…(Rodrigues & Estelita 2009). According to Estelita & Rodrigues (2007), the intercalary meristem (IM) is frequent in leaves and internodes of many monocots, scapes and pedicels.…”

Section: Discussionmentioning

confidence: 99%

“…Lindm. (Rodrigues & Estelita 2009). However, the term PTM, despite being used by many authors, as mentioned above, is still questioned.…”

Section: Discussionmentioning

confidence: 99%

Morphoanatomy of the underground system of Androtrichum trigynum (Cyperaceae)

Pereira

Rodrigues

2012

Rodriguésia

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Androtrichum has only one species, A. trigynum (Spr.) Pfeiffer, occurring in coastal regions of the southwestern Atlantic coast. It presents an underground system consisting of rhizomes and adventitious roots. The rhizome is thickened, plagiotropic, sympodial, and floral scapes and roots arise from it. From the stem promeristem, the protoderm, procambium and ground meristem are differentiated. At the apex region, the intercalary meristem and primary thickening meristem (PTM) are observed. The adventitious roots originate from the PTM, and present root apex with closed organization. The young epidermis has papillose cells, and meristematic endoderm activity is observed. In a mature root, the outer cortex, or hypodermis, and the internal cortex can be identified. The endoderm presents radially elongated cells with thin walls and the pericycle is biseriate. The anatomical features observed in the present study are found in other species of Cyperaceae and some xeromorphic characters can be identified. Key-words: xeromorphic features, adventitious roots, rhizomes. ResumoAndrotrichum apresenta uma única espécie, A. trigynum (Spr.) Pfeiffer, ocorrendo em regiões litorâneas da costa sudoeste atlântica. Apresenta o sistema subterrâneo constituído por rizomas e raízes adventícias. O rizoma é espessado, plagiotrópico e simpodial, do qual partem os escapos florais e as raízes. A partir do promeristema caulinar diferenciam-se a protoderme, o procâmbio e o meristema fundamental. Na região apical observam--se os meristemas intercalar e de espessamento primário (MEP). As raízes adventícias se originam do MEP e apresentam o ápice radicular do tipo fechado. A epiderme jovem apresenta células papilosas. Observa-se também a endoderme meristemática em atividade. Na maturidade, identifica-se o córtex externo ou hipoderme e córtex interno diferenciado em aerênquima. A endoderme tem células alongadas no sentido radial com paredes finas e o periciclo é bisseriado. As características anatômicas observadas no presente estudo condizem com outras espécies de Cyperaceae, e caracteres xeromorfos podem ser identificados. Palavras-chave: caracteres xeromorfos, raízes adventícias, rizoma. Morphoanatomy of the underground system of Androtrichum trigynum (Cyperaceae)Morfoanatomia do sistema subterrâneo de Androtrichum trigynum (Cyperaceae)

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“…3 C). En C. giganteus Vahl la hipodermis del rizoma se forma por divisiones de capas subepidérmicas y es considerada el córtex externo claramente diferenciado del córtex interno con abundantes cavidades de aire (Rodrigues & Estelita 2002, 2009.…”

Section: Discussionunclassified

“…La ocurrencia de endodermis en rizomas de Cyperaceae ha sido mencionada por distintos autores (Evans 1965, Eiten 1969, Wills & Briscoe 1970, Sharma & Mehra 1972, Govindarajalu 1974, Wills et al 1980, Wills 1987, Rodrigues & Estelita 2002, 2009, Alonso & Moraes-Dallaqua 2004, Menezes et al 2005. Otros autores no identificaron una verdadera endodermis en la capa más interna del córtex y denominaron a esa zona capa endodermoide (Plowman 1906, Kukkonen 1967, Metcalfe 1971, Rudall 1984.…”

Section: Discussionunclassified

Anatomía del sistema caulinar subterráneo de Cyperus corymbosus var: subnodosus (Cyperaceae)

et al. 2010

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RESUMENSe estudia la anatomía del sistema de ramificación subterráneo en Cyperus corymbosus Rottb. var. subnodosus (Nees et Meyen) Kük. Se describe la anatomía del rizoma y del tubérculo en este taxón. Se realiza un análisis comparativo de las variaciones observadas en diferentes estadios de desarrollo. Las características anatómicas de rizoma y tubérculos están asociadas al típico sistema caulinar subterráneo, a la forma de crecimiento de la especie y a su modo de propagación vegetativa.Palabras clave: Histología, rizoma, tubérculo, Cyperus corymbosus, Cyperaceae. ABSTRACTThe anatomy of the underground branching systems in Cyperus corymbosus Rottb. var. subnodosus (Nees et Meyen) Kük. was examined. The anatomy of the rhizome and tuber of this taxon. A comparative analysis of the variations observed in different development stages was also performed. The anatomical characteristics of the rhizome and tubers are associated with the typically underground shoot system, the growth form of the species and its mode of vegetative propagation.

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Morphoanatomy of the stem in Cyperaceae

Cited by 25 publications

References 48 publications

Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species

Hypolytrum (Cyperaceae): taxonomic and nomenclatural notes, geographical distribution and conservation status of Neotropical species

Morphoanatomy of the underground system of Androtrichum trigynum (Cyperaceae)

Anatomía del sistema caulinar subterráneo de Cyperus corymbosus var: subnodosus (Cyperaceae)

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