Ontogênese, anatomia e ultra-estrutura dos nectários extraflorais de Hymenaea stigonocarpa Mart. ex Hayne (Fabaceae - Caesalpinioideae)

Paiva, Élder Antônio Sousa; Machado, Sílvia Rodrigues

doi:10.1590/s0102-33062006000200022

Cited by 56 publications

(74 citation statements)

References 32 publications

(62 reference statements)

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“…These are hyphomycetes present on the pores of secretory units of C. speciosus and C. pendulus. Development of a fungus was also shown in old EFNs of Hymenaeae stigonocarpa/Fabaceae ( Paiva and Machado, 2006). Most probably, the fungi use the plant exudates, they may stimulate metabolic process, and can compete with pathogenic microorganisms ( Golubtsova et al, 2007).…”

Section: Discussionmentioning

confidence: 87%

“…As observed in Aphelandra ( McDade and Turner, 1997), large aggregates of nectaries produce large quantities of nectar. Furthermore, the predominance of the EFN and nectarioles on the lower leaf surfaces in the three species of Calolisianthus may contribute to reduction of nectar loss by evaporation, so that its availability for ant attendance is increased ( Paiva and Machado, 2006). Although the greater number of nectarioles at the bases of C. speciosus and C. pendulus leaves, forming conspicuous EFNs, may restrict ants to patrol only the basal portions of leaves, plants with improved nectar production concentrated at larger, localised nectaries might increase the attendance of ants to these important sites, in addition to possibly recruiting more ants ( McDade and Turner, 1997).…”

Section: Discussionmentioning

confidence: 99%

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Distribution, structural and ecological aspects of the unusual leaf nectaries of Calolisianthus species (Gentianaceae)

Delgado

Silva

Báo

et al. 2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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Nectaries in leaves of Gentianaceae have been poorly studied. The present study aims to describe the distribution, anatomy, and ecological aspects of extrafloral nectaries (EFNs) of three Calolisianthus species and in particular the ultrastructure of EFNs in Calolisianthus speciosus during leaf development, discussing its unusual structure. Leaves of Calolisianthus species were fixed and processed by the usual methods for studies using light, scanning microscopy and transmission electron microscopy (TEM). Ion chromatography was used to analyze the nectar exudates of C. speciosus. The distribution patterns of nectar secretion units were analysed by ANOVA and t-tests. Two EFNs that can be seen macroscopically were observed at the bases of C. speciosus and C. pendulus leaves. Such large nectaries are absent there in C. amplissimus. Another similarly large EFN is observed at the apex of each leaf in all species. The EFNs at the base of the young leaves in C. speciosus are visited by ants during the rainy season. EFNs are formed by several nectar secretory units (nectarioles) that are present throughout the leaves. Each nectariole is formed by rosette cells with a central channel from which the nectar is released. Channels of old C. speciosus and C. pendulus EFNs were obstructed by fungi. TEM of EFNs in young leaves showed cytoplasms with secretion, small vacuoles, mitochondria, cell wall ingrowth, and plasmodesmata. TEM of EFNs in old leaves demonstrated dictyosomes, plastids, mitochondria, segments of endoplasmatic reticulum, and lipid droplets. The nectar contains sucrose, glucose and fructose.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Distribution, structural and ecological aspects of the unusual leaf nectaries of Calolisianthus species (Gentianaceae)

Delgado

Silva

Báo

et al. 2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…Em Leguminosae já foram examinados Nefs elevados, tricomas glandulares, embebidos e outros, com localizações e aspectos morfológicos diversos (Elias 1983;Paiva & Machado 2006;Machado et al 2008). Os tipos já descritos para os Nefs de Leguminosae são compatíveis com a maioria dos encontrados neste estudo.…”

Section: Figura 2 Nectários Em Espécies De Leguminosae De Mirandiba-unclassified

“…Paiva & Machado (2006) registraram este mesmo tipo em Hymenaea stigonocarpa. Embora, embebidos nos órgãos onde ocorrem, esses Nefs se enquadram na categoria dos nectários estruturados porque apresentam diferenciação dos tecidos (Melo 2008).…”

Section: Figura 2 Nectários Em Espécies De Leguminosae De Mirandiba-unclassified

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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“…(Fabaceae) foi descrita por Paiva et al (2001) e em Hymenaea stigonocarpa Mart. ex Hayne (Fabaceae) foi registrada por Paiva & Machado (2006). Francino et al (2006) descreveram NEF em Chamaecrista trichopoda (Caesalpinioideae), situado na parte adaxial do pecíolo, com o ápice formando uma concavidade, bordas levemente abauladas e pedúnculo com cerca de 1 mm de altura.…”

Section: Resultsunclassified

Caracterização farmacognóstica das folhas e sementes de Albizia lebbeck (L.) Benth. (Fabaceae)

Miranda¹,

Arantes²,

Rezende³

et al. 2009

Rev. bras. farmacogn.

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RESUMO:Albizia lebbeck (L.) Benth. é popularmente conhecida no Brasil por coração-de-negro. É uma espécie aclimatada nesse país. As sementes dessa espécie são utilizadas no tratamento de diarréia, disenteria e hemorróidas e as folhas, no tratamento de úlceras e nas conjuntivites alérgicas. Este trabalho foi realizado com a finalidade de determinar as características macroscópicas e microscópicas das folhas e sementes dessa planta, uma vez que estas são as partes usadas popularmente. Algumas características de valor na sua diagnose foram apontadas e ilustradas por fotomicrografias. Reações de fitoquímica e a determinação do conteúdo de água e de cinzas foram realizadas no pó das folhas e sementes de A. lebbeck. Saponinas, alcalóides e cumarinas foram detectados nas folhas e sementes; flavonóides foram também identificados nas folhas. O teor de umidade foi 6,78% e 7,91%, respectivamente, para o pó das folhas e sementes. Os valores de cinzas totais e cinzas insolúveis em ácido foram 9,60% e 0,62% para as folhas e 4,13% e 0,21% para as sementes. Os dados obtidos são importantes para o controle de qualidade dessa planta medicinal. O extrato bruto da planta não apresentou atividade antibacteriana.Unitermos: Albizia lebbeck, coração-de-negro, morfoanatomia, planta medicinal.ABSTRACT: "Pharmacognostic characterization of leaves and seeds of Albizia lebbeck (L.) Benth. (Fabaceae)". Albizia lebbeck (L.) Benth., is popularly known in Brazil as "coração-de-negro". It is a species acclimatized in Brazil. The seeds of this species are used to treat diarrhea, dysentery and hemorrhoids and the leaves are used for the treatment of ulcers and allergic conjunctivitis. The purpose of this work was to determine the macroscopic and microscopic characteristics of the leaves and seeds of this plant, since these are the parts used popularly. Some characters of diagnostical value are pointed out and illustrated by photomicrographs. Phytochemistry reactions and determination of water and ash were done on the powder of A. lebbeck. Saponins, alkaloids, coumarins were detected in the leaves and seeds; flavonoids were also detected in the leaves. The content of water was 6.78% and 7.91%, respectively, for leaf and seed powder. The values of total ashes and acid insoluble ashes were 9.60% and 0.62% for leaf, and 4.13% and 0.21%, for seed powder. The data obtained are important for the quality control of this medicinal plant. The crude extract of this plant did not show antibacterial activity.

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Ontogênese, anatomia e ultra-estrutura dos nectários extraflorais de Hymenaea stigonocarpa Mart. ex Hayne (Fabaceae - Caesalpinioideae)

Cited by 56 publications

References 32 publications

Distribution, structural and ecological aspects of the unusual leaf nectaries of Calolisianthus species (Gentianaceae)

Distribution, structural and ecological aspects of the unusual leaf nectaries of Calolisianthus species (Gentianaceae)

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

Caracterização farmacognóstica das folhas e sementes de Albizia lebbeck (L.) Benth. (Fabaceae)

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