|
|
|
|
|
Estelita,Maria Emília Maranhão; Rodrigues,Ana Claudia. |
São enfocados caracteres anatômicos diferenciais entre rizoma e escapo. Além da atividade dos meristemas apicais de ambos, no caule observou-se a presença e atividade do MEP (meristema de espessamento primário); os feixes vasculares, portanto, têm origem mista (do procâmbio e do MEP). No escapo, não ocorre MEP, portanto, os feixes são apenas de origem procambial. Entretanto, observou-se considerável atividade do meristema intercalar, o que produz o alongamento dos entrenós. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomia; Cyperaceae; Escapo; Rizoma. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300006 |
| |
|
|
Souza,Gardene Maria de; Estelita,Maria Emília Maranhão; Wanderley,Maria das Graças Lapa. |
O subgênero Chevaliera está representado por 21 espécies, das quais grande parte ocorre no Brasil, habitando diferentes ecossistemas. Com o objetivo de auxiliar a taxonomia das espécies, são apresentados dados da anatomia foliar de 11 espécies do subgênero. Entre os caracteres mais relevantes destacam-se: posição dos estômatos, câmara subestomática com células espessadas, hipoderme, número de camadas do parênquima aqüífero, o formato das células dos canais de aeração e distribuição das fibras no mesofilo. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aechmea; Anatomia foliar; Bromeliaceae; Chevaliera. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000300016 |
| |
|
|
Rodrigues,Ana Claudia; Estelita,Maria Emília Maranhão. |
Cyperus giganteus shows Kranz anatomy of the clorocyperoid type or with two sheaths, one internal, adjacent to the vascular system and known as Kranz sheath, with thin-walled cells and a large number of organelles, mainly chloroplasts; and an external sheath, the mestome sheath or endodermis, the cells of which present thickened walls, are without chloroplasts and possess a suberin lamella, together with the casparian strip which are detected in early stages of differentiation. The development of the vascular bundles shows the Kranz sheath originating from the procambial as well as the mestome sheath. The chloroplasts of the Kranz cells are relatively larger, with convoluted thylakoids and a prominent peripheral reticulum, while the chloroplasts of the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bracts; Clorocyperoid; Cyperaceae; Cyperus giganteus; Kranz. |
Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000400003 |
| |
|
|
Rodrigues,Ana Claudia; Estelita,Maria Emília Maranhão. |
Cyperaceae are usually perennial, with underground stems mainly rhizomatous, however, other stem types may also occur, such as corms and tubers. The underground stems of five Cyperaceae species were examined. Cyperus rotundus and Fuirena umbellata have plagiotropic rhizomes, while C. esculentus, C. odoratus, Hypolytrum schraderianum and Bulbostylis paradoxa have orthotropic rhizomes. Corms occur in C. rotundus and C. esculentus, and stolons in C. esculentus. The primary body originates from the activity of the apical meristem and later, from the primary thickening meristem (PTM). Secondary growth results from secondary thickening meristem (STM) activity, and occurs in rhizomes of H. schraderianum, B. paradoxa, C. odotarus and F. umbellata. The procambium... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bulb; Corm; Primary thickening meristem; Rhizome; Secondary thickening meristem; Stolon. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300030 |
| |
|
|
Estelita,Maria Emília Maranhão; Rodrigues,Ana Claudia. |
The Cyperaceae show the ability to incorporate silicon by depositing colloidal silica, which is recorded by the occurrence of projections in the form of cones, in inner tangential walls of some epidermal cells or "silica cells". Leaves of C. ligularis and R. aberrans were analyzed through the technique of electron backscatter. Cyperus ligularis accumulates silica, in addition to "silica cells", in some stomata, trichomes and the cell walls that surround the cavities of the aerenchyma. The silica in the latter occurs in various forms; however, the cells located near the vascular bundles have conical projections, similar to those of the epidermis. Rhynchospora aberrans presents "silica cells" whose projections have tapered "satellites". In this species,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stomata; Epidermal cells; Trichomes; Cell walls. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000200004 |
| |
|
|
|