Estruturas secretoras em cipó-d'alho (Mansoa standleyi (Steyerm.) A. H. Gentry, Bignoniaceae): ocorrência e morfologia

Potiguara, R.C.V.; Aguiar-Dias, Ana Cristina Andrade de; Kikuchi, Tatiani Yuriko Souza; Feio, Ana Carla; Silva, Rolf Junior Ferreira

doi:10.1590/s0044-59672012000300003

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Due to the diversity of glandular trichomes in the tribe, our analyses confirm the reports of several authors that evidenced the taxonomic value of these structures (Bureau and Schumann 1897;Seibert 1948;Gentry 1980;Vilhena-Potiguara et al 2012;Nogueira et al 2013;Gama et al 2013).…”

Section: Discussionsupporting

confidence: 90%

Structure and distribution of glandular trichomes in three species of Bignoniaceae

et al. 2015

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Glandular trichomes play a major role in the morphological characterization of the Bignoniaceae. Due to their great diversity of forms and functions, this study aimed to inventory the glandular trichomes present in the aerial vegetative axis of Amphilophium magnoliifolium, Martinella obovata and Stizophyllum riparium, analyze their structure and register the participation of ants in these plants. Fresh samples from the nodal region, petiole and from medium to apical regions of the leaflet blade were fixed and processed according to usual methods in light and scanning electron microscopies. The glandular trichomes found were: peltate, capitate, stipitate, and patelliform/cupular. Peltate trichomes are the most abundant ones and present the most uniform distribution. Patelliform/cupular trichomes occur at specific regions, such as prophylls, leaflet blade and nodal regions. Martinella obovata is the only species that presents capitate and stipitate trichomes, which are widely distributed along the entire aerial vegetative axis. Ants were found in all species, mainly at nodal regions. The occurrence of the capitate-type trichome is reported for the first time to the genus. KEYWORDS: Bignonieae, Nectaries, Secretory structures, Stipitate trichome. Estrutura e distribuição de tricomas glandulares em três espécies da família Bignoniaceae RESUMOTricomas glandulares desempenham papel importante na caracterização morfológica de Bignoniaceae e, devido à grande diversidade de formas e funções que esses tricomas apresentam, o objetivo desse estudo foi inventariar os tricomas glandulares presentes no eixo vegetativo aéreo de Amphilophium magnoliifolium, Martinella obovata. e Stizophyllum riparium, bem como analisar sua estrutura e registrar a participação de formigas nessas espécies. Amostras frescas da região mediana à apical das lâmina foliolar, pecíolo e nó foram fixadas e processadas de acordo com os métodos usuais para microscopia de luz e eletrônica de varredura. Os tricomas glandulares encontrados nas espécies foram: peltados, capitados, estipitados e pateliformes/cupuliformes. Dentre esses tipos o mais abundante foi o tricoma peltado, apresentando também uma distribuição mais uniforme que os demais. Os tricomas pateliformes/cupuliformes estavam em regiões mais específicas, como profilos, lâmina foliolar e na região nodal. Martinella obovata foi a única espécie que apresentou os tricomas capitados e estipitados, amplamente distribuídos ao longo de todo eixo vegetativo aéreo. Em todas as espécies foram encontradas formigas, principalmente nas regiões nodais. A ocorrência do tricoma capitado é relatada pela primeira vez para o gênero.

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Section: Discussionsupporting

confidence: 90%

Structure and distribution of glandular trichomes in three species of Bignoniaceae

et al. 2015

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“…These ants hunt both large and small prey such as grasshoppers, termites and wasps (Richard et al 2001), which could play a role in combatting on plant-preying insects. The presence of a secretory structure that release exudate as reward to insects allows for the mutualistic relationship between plants and insects, especially ants (Vilhena-Potiguara et al 2012).…”

Section: Amazonicamentioning

confidence: 99%

Morphology, ontogeny and structure of the stipular nectaries in Caamembeca spectabilis (Polygalaceae)

2016

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Nodal glands are found in one third of the Polygalaceae genera and have valuable taxonomic, ecological and evolutionary significance. In Brazil, they occur in five of the eleven genera already registered. However, there is still a controversy regarding the origin of these structures. The objective of this study was to characterize the morphology and the origin of nodal glands in Caamembeca spectabilis, in order to increase the structural and functional knowledge of these glands in the genera. Samples of nodal regions were collected, fixed and processed according to the methods of light microscopy and electron scanning. Ants were observed and identified along the stem axis. The glucose in exudate allows us to classify these glands as extrafloral nectaries. They are located in pairs on the nodal region. However, its origin is in the leaf trace. In the longitudinal section, the nectaries were present in the apex of cells with anticlinal walls impregnated with suberin, which represents the first record for the family. In this region there is also the formation of a hole by lysis. The secretory tissue is surrounded by phloem. Xylem vessels were observed only on the basis of the nectary, where there are also idioblasts with crystals in druse type. We have studied the ontogeny of the glands nodal in Caamembeca spectabilis and unveiled that these glands are linked to the leaves as stipular nectaries. In addition, the new findings presented here may add support for the understanding of morphology and anatomy of nodal glands in Caamembeca. KEYWORDS: Fabales, extrafloral nectaries, vascularization, suberin, ants. Morfologia, ontogenia e estrutura dos nectários estipulares em Caamembeca spectabilis (Polygalaceae) RESUMOGlândulas nodais são encontradas em um terço dos gêneros de Polygalaceae e possuem grande importância taxonômica, ecológica e evolutiva. No Brasil, ocorrem em cinco, dos onze gêneros já registrados. Contudo, ainda há controvérsias quanto à origem dessas estruturas. O objetivo deste trabalho foi caracterizar a morfologia e a origem das glândulas nodais em Caamembeca spectabilis, visando ampliar o conhecimento estrutural e funcional dessas glândulas no gênero. Amostras das regiões nodais foram coletadas, fixadas e processadas segundo os métodos em microscopia de luz e eletrônica de varredura. Formigas foram observadas e identificadas ao longo do eixo caulinar. A glicose no exsudato permite tratar as glândulas como nectários extraflorais. Esses estão localizados aos pares na região nodal. Porém, sua origem ocorre no traço foliar. Os nectários, em secção longitudinal, apresentam as células do ápice com paredes anticlinais impregnadas com suberina, sendo este o primeiro registro para a família. Nessa região também ocorre a formação de um orifício por lise. O tecido secretor do nectário é circundado pelo floema. Vasos de xilema foram observados apenas na base do nectário, onde também ocorrem idioblastos com cristais do tipo drusas. Dessa forma, este estudo confirma a trajetória ontogenética das glândulas no...

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“…Among the alternatives for understanding the patterns observed in ant-plant interactions, the hypothesis of "herbivorous protection" (sensu Bentley, 1977) has been intensively studied over the last three decades (Santos and Del-Claro, 2001;Vilhena-Potiguara et al, 2012;Martins et al, 2019). In Brazil, the ant-excluding has been conducted in the tropics showing that ants can indeed benefit plants reducing the impacts of herbivory (Marazzi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Trade-off in plant-ant interactions: seasonal variations

et al. 2020

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This work evaluated the effect of seasonality on ant-plant interaction in a Seasonally Dry Tropical Forests, using as an ecological model the species Ipomoea carnea subs. fistulosa (Convolvulaceae). We performed systematic collection of ants, herbivores and leaves in marked plants, evaluated the efficiency of herbivorous capture by ants, and the effects of ant presence over the pollinator behavior and plant fitness in dry and rainy seasons. The presence of ants in the plants reduced the number of herbivores (dry season: F2.27=4.7617, p=0.0166; rainy season: F2.27=5.8655, p=0.0078). However, the capture efficiency was negatively affected by the presence of myrmecophilous larvae, so that the average of ants recruited on termite leaves was 2.06 ants per termite, the average recruitment of ants on larval leaves was 22.4 larva ants. In addition, the presence of ants reduced pollinator visits and promoted fruit reduction during the dry season (ANOVA: F = 3.44; p = 0.0653). In conclusion, the association with ants can result in a balance not always favorable to the host plant, and this result actually depends on abiotic (e.g. precipitation) and biotic factors (e.g. ant species composition and abundance, influence of other trophic levels and identity of associated herbivores).

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Estruturas secretoras em cipó-d'alho (Mansoa standleyi (Steyerm.) A. H. Gentry, Bignoniaceae): ocorrência e morfologia

Cited by 6 publications

References 18 publications

Structure and distribution of glandular trichomes in three species of Bignoniaceae

Structure and distribution of glandular trichomes in three species of Bignoniaceae

Morphology, ontogeny and structure of the stipular nectaries in Caamembeca spectabilis (Polygalaceae)

Trade-off in plant-ant interactions: seasonal variations

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