Consulta: subjectFacets:"Colleters"
Registros recuperados: 7
Data/hora: 10/06/2024 08:10:06

Distribuição e caracterização anatômica dos coléteres foliares de Prestonia coalita (Vell.) Woodson (Apocynaceae)
Provedor de dados: 88
Autores: RIO,MARIA C. SCATOLIN; CASTRO,MARÍLIA M.; KINOSHITA,LUIZA S.
Um estudo estrutural dos coléteres foliares de Prestonia coalita (Vell.) Woodson foi realizado com a finalidade de definir o número e a posição ocupada pelos coléteres, caracterizar a sua estrutura, determinar o estádio de desenvolvimento da folha em que eles se encontrem em fase secretora e comprovar a presença de mucilagem na secreção por eles produzida. Em cada nó, 14-18 coléteres intrapeciolares são observados; sua diferenciação ocorre nos estádios iniciais do desenvolvimento foliar e a atividade secretora em primórdios com ca. 5-8 mm de comprimento. Os coléteres são constituídos por uma longa cabeça, formada por um núcleo central de células parenquimáticas rodeado por epiderme uniestratificada secretora em paliçada, e um curto pedúnculo, no qual as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colleters; Leaves; Secretion; Prestonia coalita; Apocynaceae.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300010

Development, structure and distribution of colleters in Mandevilla illustris and M. velutina (Apocynaceae)
Provedor de dados: 88
Autores: APPEZZATO-DA-GLÓRIA,BEATRIZ; ESTELITA,MARIA EMÍLIA MARANHÃO.
Colleters of Mandevilla illustris and M. velutina are present on the cotyledons, shoot apices, mature leaves and on the nodal region, where they are interpetiolar and intrapetiolar. In M. velutina there are two colleters on the adaxial basal part of the leaf blade, and in M. illustris, this number varies. The differentiation of the colleters occurs in the early stages of leaf development. When colleters are mature, they consist of a long head on a short stalk. The central core of the colleter is made up of parenchymatous cells that may exhibit phenolic compounds and is surrounded by radially elongated epithelial cells. The foliar and intrapetiolar colleters can exhibit vascularization. The colleters produce a translucient sticky substance that reacts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colleters; Mandevilla; Apocynaceae; Anatomy; Ontogeny.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000200001

Rubus alutaceus (Rosaceae), a new species for Colombia with agronomic potential
Provedor de dados: 94
Autores: Moreno–Medina,Brigitte Liliana; Casierra–Posada,Fánor; Albesiano,Sofía.
Abstract  In Gachantivá, Colombia, Rubus alutaceus has been used for commercial purposes for more than one decade but so far with unknown taxonomic identity. For its identification, the anatomical and morphological characteristics of its flowers, fruits, leaves, stems, and seeds, as well as the physicochemical characteristics of its fruits such as color, equatorial and polar diameter, fresh weight, pH and total soluble solids (TSS), were studied. Qualitative and quantitative morphological parameters were evaluated, and longitudinal and transverse cuts were made for histological studies. The plants were found to have trifoliate and pentafoliate leaves; whitish–yellow subglobose polydrupes, fully mature fruits with 8.8°Brix TSS; elliptical, subglobose seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium oxalate crystals; Colleters; Histology; Taxonomic novelty; Postharvest parameters.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000200201

Leaf anatomical features of three Theobroma species (Malvaceae s.l.) native to the Brazilian Amazon
Provedor de dados: 36
Autores: Garcia,Tarcymara Barata; Potiguara,Raimunda Conceição de Vilhena; Kikuchi,Tatiani Yuriko Souza; Demarco,Diego; Aguiar-Dias,Ana Cristina Andrade de.
Theobroma species have economic importance due to their use in the cosmetic and food industries, mainly in the production of chocolate. However, the anatomy of their vegetative structures remains poorly studied. The goal of this study was to describe the anatomical features of Theobroma grandiflorum, T. speciosum and T. subincanum to contribute to the biological knowledge of these species, as well as provide support to the biotechnological studies of native fruit plants of the Amazon. Leaves at different developmental stages were collected and analyzed under light microscopy and scanning electron microscopy. Sessile and stalked stellate trichomes and digitiform glandular trichomes were observed in the expanded leaves of T. grandiflorum and T. subincanum....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colleters; Cupuassu; Glandular trichomes; Mucilage; Stellate trichomes.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000300001

Stipular colleters in Psychotria nuda (Cham. &amp;amp; Schltdl.) Wawra (Rubiaceae): micromorphology, anatomy and cristals microanalysis
Provedor de dados: 39
Autores: Miguel,Emílio de Castro; Moraes,Daniel Gomes de; Cunha,Maura Da.
Colleters are secretory structures, with a protective function, that occur in different organs and in many Angiospermae families. The aim of this work was to describe the anatomy and micromorphology of colleters present in Psychotria nuda (Cham. &amp;amp; Schltdl.) Wawra as well as analyze the structure and composition of crystals from the central axis of the structure under study. The material was collected at the Tinguá Biological Reserve and processed according to usual techniques for light and scanning electron microscopy. The colleters are of the lachrymiform type, with an elongated central axis, formed by fundamental parenchyma, sheathed by a palisade layer, responsible for the secretion. Raphid crystals were observed in the central axis of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium crystals; Colleters; Secretory structure; Rubiaceae.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000400013

Outer cell wall structure and the secretion mechanism of colleters of Bathysa nicholsonii K. Schum. (Rubiaceae)
Provedor de dados: 39
Autores: Miguel,Emilio de Castro; Pireda,Saulo; Barros,Claudia Franca; Zottich,Umberto; Gomes,Valdirene Moreira; Miguens,Flavio Costa; Cunha,Maura Da.
ABSTRACT Secretory structures are formed by many types of plants and are present on numerous different organs. Among the many types of known secretory structures, colleters are predominant on plants of the Rubiaceae. One remarkable characteristic of secretory tissues is the export of exudates; however, the precise mechanism involved in this process is still unclear. To better understand the mechanisms of exudate externalization it is necessary to understand the ultrastructure and dynamics of the outer cell wall of the secretory structures during the secretory process, and so we investigated these aspects of the colleters of Bathysa nicholsonii. The outer cell wall (OCW) exhibits multiple layers: a basal polysaccharide rich layer; a cuticular membrane,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colleters; Outer cell wall; Rubiaceae; Secretion accumulation site; Secretion mechanism; Secretory structures; Secretory tissues.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300411

Structures related to resprouting potential of two Myrtaceae species from Cerrado: morpho-anatomical and chemical studies
Provedor de dados: 42
Autores: SILVA,GABRIELA S. DA; FERRARO,ALEXANDRE; OGANDO,FELIPE I.B.; AGUIAR,CLAUDIO L. DE; APPEZZATO-DA-GLÓRIA,BEATRIZ.
Abstract  Resprouting is a functional trait in species which occur in fire-prone ecosystems. These plants can resprout from aerial buds and by recruiting belowground bud bank using carbohydrates allocated in roots as resource. In this study, we present morpho-anatomical features and chemical composition related to the resprouting potential of two species of Eugenia L. in an area of the Cerrado (Brazilian savanna) under regeneration, after the clear-cutting of Pinus sp. with the later burning of pine needles layer. We used standard histological techniques for belowground organs analysis and aerial buds protection degree. Belowground buds in layer from soil surface down to 10 depth were counted and the chemical analyses were performed on roots. In all aerial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accessory buds; Bud bank; Brazilian savanna; Colleters; Eugenia dysenterica; Eugenia punicifolia.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100702