Ontogenia dos nectários extraflorais de Triumfetta semitriloba (tiliaceae)

Leitão, Carlos André Espolador; Meira, Renata Maria Strozi Alves; Azevedo, Aristéa Alves; Araújo, J. M. de

doi:10.1590/s0100-83582002000300003

Cited by 10 publications

(9 citation statements)

References 31 publications

(31 reference statements)

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“…The characteristics of the secretory epidermis and nectariferous tissue observed in the nectary of S. biglandulosum match the description of structural extrafloral nectaries in other species as reported by several authors (Dave and Patel 1975;Elias and Gelband 1976;Fahn 1979;Metcalfe and Chalk 1979;Bentley and Elias 1983;Anderson and Symon 1985;Gaffal et al 1998;Freitas et al 2001;Paiva et al 2001;Leitão et al 2002;Rocha et al 2002;Thadeo et al 2008).…”

Section: Discussionsupporting

confidence: 87%

“…The pattern of development observed in the nectaries of S. biglandulosum was similar to what has been reported for extrafloral nectaries of other plant families (Arbo 1972;Dave and Patel 1975;Roshchina and Roshchina 1993;Silva and Machado 1999;Leitão et al 2002;Paiva and Machado 2006;Thadeo et al 2008). The asynchronous cellular divisions during the nectary ontogenesis are an ordinary process, as described for Pedilanthus tithymaloides, Euphorbiaceae (Dave and Patel 1975), and Triumfetta semitriloba, Tiliaceae (Leitão et al 2002).…”

Section: Discussionsupporting

confidence: 83%

“…These results showed that the nectar of the S. biglandulosum is nutritionally rich. The presence of proteins, sugars, polysaccharides and pectin is common among several kinds of nectary glands (Bentley and Elias 1983;Roshchina and Roshchina 1993;Leitão et al 2002;Nicolson and Thornburg 2007).…”

Section: Discussionmentioning

confidence: 99%

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Ontogenetic, anatomical and histochemical study of the extrafloral nectaries of Sapium biglandulosum (Euphorbiaceae)

2010

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The present paper aims to confirm the nature of secretory structures found on the petiole and leaf margins of Sapium biglandulosum Müell. Arg. The anatomy, ontogenesis and histochemistry were studied by light microscopy, whereas mono-and disaccharides in the exudates were detected by high performance liquid chromatography. The exudate from the petiole had a total sugar concentration of 32.5% (w/v), of which 38.1% was fructose, 43.7% glucose and 18.2% sucrose. The petiolar gland started its development from a group of meristematic cells that underwent asynchronous divisions. At the end of the ontogenesis, a well structured vascularised gland made up of a palisade secretory epidermis, secretory parenchyma and a secretory pore was observed. Leaf-margin glands showed a similar anatomy. Histochemical tests revealed the presence of proteins, pectins, carbohydrates, tannins and anthocyanins. On the basis of our results, there is compelling evidence that the studied glands are in fact extrafloral nectaries.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 83%

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Ontogenetic, anatomical and histochemical study of the extrafloral nectaries of Sapium biglandulosum (Euphorbiaceae)

2010

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“…Muitos autores têm ressaltado a importância das variações nas características dessas glândulas como ferramenta efi caz para estudos de sistemática em diferentes categorias taxonômicas, especialmente na família Leguminosae (Bhattacharyya & Marheshawari 1970a, 1970bMetcalfe & Chalk 1979;Leitão et al 2002;Bortoluzzi et al 2007;Morim & Barroso 2007).…”

Section: Introductionunclassified

Morfologia de nectários em Leguminosae senso lato em áreas de caatinga no Brasil

et al. 2010

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RESUMO -(Morfologia de nectários em Leguminosae senso lato em áreas de caatinga no Brasil). Nectários extrafl orais (Nefs) são glândulas secretoras de néctar encontradas em diversas espécies de Angiospermas, inclusive Leguminosae. Essas estruturas podem se apresentar sob diferentes formas (elevados, embebidos; com ou sem estipe; cores distintas) e posições nas plantas (na raque, no pecíolo), sendo essas características relevantes aos estudos de taxonomia e sistemática. Este trabalho analisou a diversidade morfológica dos Nefs em Leguminosae de uma área prioritária para a conservação da caatinga no Estado de Pernambuco. As 35 espécies de Legumionsae estudadas foram coletadas no Município de Mirandiba, no semi-árido Pernambucano, e submetidas às técnicas usuais para análise e descrição morfológica. Entre essas espécies, foram caracterizados Nefs com origem primária (não substitutivos) e secundária (substitutivos). Dois diferentes tipos com onze formatos distintos foram encontrados entre elas. Uma grande variedade de localização, coloração, projeção, e dimensão foram registradas aqui. Uma chave de identifi cação e ilustrações foram elaboradas também. Os dados apresentados aqui ampliam o número de espécies estudadas com Nefs para a família, e também confi rmam a importância taxonômica e ecológica dessas estruturas para os legumes da região do semi-árido do Brasil. Palavras-chave: Glândulas, morfologia, néctar, sistemática ABSTRACT -(Nectary morphology of Leguminosae senso lato in areas of dry seasonal forest in Brazil). Extrafl oral nectaries (Efns) are nectar secreting glands found in many species of Angiosperms, including Leguminosae. These structures have various forms (elevated, embedded; stalk present or not; different colors) and positions on the plants (on the rachis, on the petiole), and these characteristics are relevant to taxonomy and morphology studies. This work analyses the morphological diversity of Efns in Leguminosae from a priority conservation area of caatinga in Pernambuco state. The 35 Leguminosae species studied were collected in Mirandiba municipality, a semi-arid region of Pernambuco and submitted to the usual techniques of anatomy and morphology analyses. Among these species, Efns with primary (non-substitutive) and secondary (substitutive) origin were characterized. Two different kinds and eleven distinct Efns forms were found. A large variety of placement, color, shape, and size are reported here. An identifi cation key and illustrations are also provided. Our data increased the number of species studied with Efns in the family, and also confi rm the taxonomic and ecological importance of this structure for legumes from the semi-arid region of Brazil.

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“…The basal teeth glands located on the margins of the leaves and of the bract subtending the inflorescence of T. semitriloba are visited by ants (Sobrinho et al 2002). An anatomical and ontogenetic study on the foliar glands has been published (Leitão et al 2002), but no other references were found regarding the anatomy and the secretory product of these glands, including the floral nectaries.…”

Section: Introductionmentioning

confidence: 99%

Anatomy of the floral, bract, and foliar nectaries of Triumfetta semitriloba (Tiliaceae)

Leitão¹,

Meira²,

Azevedo³

et al. 2005

Can. J. Bot.

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Triumfetta semitriloba Jacq. (Tiliaceae) is a tropical weedy species with floral nectaries and glands located at the margins of the leaves. The objectives of this work were to describe the anatomy of these secretory structures and to analyze their exudates. Sucrose, glucose, and fructose were identified in the product released by these secretory structures, characterizing them as nectaries. The nectaries of T. semitriloba are of a specialized type; a secretory epidermis comprised of pluricellular and multiserial nectariferous trichomes covers a nectariferous parenchyma, vascularized by phloem and xylem. A mass of phenolic compounds occurs in the head cells of the nectariferous trichomes of the foliar and bract nectaries; however, it is absent in trichomes of the floral nectary. The leaf and bract nectaries differed from those from flowers in their length and diameter. Structural features of the nectaries of T. semitriloba are typical of other taxa of the Malvales. Résumé : Le Triumfetta semitriloba Jacq. (Tiliaceae) est une espèce adventice tropicale munie de nectaires et de glandes localisés sur le pourtour des feuilles. Les objectifs du travail présenté sont de décrire l'anatomie de ces structures sécrétrices et d'en analyser les exsudats. Les auteurs ont identifié le saccharose, le glucose et le fructose dans les produits relâchés par ces structures sécrétrices, des substances caractéristiques des nectaires. Les nectaires du T. semitriloba sont d'un type spécialisé; un épiderme sécréteur constitué de trichomes nectarifères pluricellulaires et multisériés recouvre un parenchyme nectarifère, vascularisé par du phloème et du xylème. On retrouve une masse de composés phénoliques dans les cellules terminales des trichomes nectarifères des nectaires des feuilles et des bractées; cependant, elle est absente chez le trichome des nectaires floraux. Les nectaires des feuilles et des bractées diffèrent de ceux des fleurs par leur longueur et leur diamètre. Les structures des nectaires du T. semitriloba sont typiques des autres taxons des Malvales.

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Ontogenia dos nectários extraflorais de Triumfetta semitriloba (tiliaceae)

Cited by 10 publications

References 31 publications

Ontogenetic, anatomical and histochemical study of the extrafloral nectaries of Sapium biglandulosum (Euphorbiaceae)

Ontogenetic, anatomical and histochemical study of the extrafloral nectaries of Sapium biglandulosum (Euphorbiaceae)

Morfologia de nectários em Leguminosae senso lato em áreas de caatinga no Brasil

Anatomy of the floral, bract, and foliar nectaries of Triumfetta semitriloba (Tiliaceae)

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