Foliar colleters in Anacardiaceae: first report for the family

Lacchia, Ana Paula Stechhahn; Tölke, Elisabeth Emília Augusta Dantas; Carmello-Guerreiro, Sandra Maria; Ascensão, Lia; Demarco, Diego

doi:10.1139/cjb-2015-0236

Cited by 22 publications

(9 citation statements)

References 34 publications

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“…Secretory structures are involved in the production of different substances, both in the vegetative and reproductive organs of plants. In flowers and inflorescences, these include such structures as idioblasts, glandular trichomes (Leite et al, 2018), colleters (Lacchia et al, 2016), laticifers (Marinho et al, 2018), osmophores, and floral and extra-floral nectaries (De Souza et al, 2005). Trichomes are classified into glandular and non-glandular trichomes.…”

Section: Discussionmentioning

confidence: 99%

Deep in the Jelly: Histochemical and Functional Aspects of Mucilage-Secreting Floral Colleters in the Orchids Elleanthus brasiliensis and E. crinipes

et al. 2019

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Colleters are trichomes or emergencies that produce a sticky exudate consisting of a mixture of mucilage, lipids, terpenes, and phenolic compounds. Colleters occur in at least 60 families of angiosperms; however, reports of them are scarce for the Orchidaceae. Elleanthus brasiliensis is distinguished by the presence of an abundant gelatinous secretion that covers almost all of its inflorescences. We aimed to describe the histology of colleters in inflorescences of E. brasiliensis and Elleanthus crinipes , and to analyze the chemical composition of their secretion to better understand the functions of these secretory structures. Due to the low frequency of colleters and lack of visible secretion in E. crinipes , histochemical tests and chemical analyses were not performed for this species. Colleters are of a brush type and their secretion has, at the same time, hydrophilic and lipophilic components. Histochemical tests further revealed the presence of pectin, mucilage, lipids, terpenes, phenolic compounds, and proteins. The GC-MS analysis confirmed the presence of γ-sitosterol and palmitic, linoleic, and stearic acids in the secretion of E. brasiliensis . Infrared analysis indicated the possible presence of polysaccharides in the secretion. The occurrence of colleters in both species studied and in other orchids described in the literature suggests that these structures are common in the inflorescences of tropical orchids. In these environments, the hydrated polysaccharides in the secretion form a dense matrix that can act as a physical barrier, and terpenes may help to protect against herbivores and pathogenic microorganisms. This information broadens our knowledge of the morphological and chemical diversity of the secretions produced by orchid colleters.

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Section: Discussionmentioning

confidence: 99%

Deep in the Jelly: Histochemical and Functional Aspects of Mucilage-Secreting Floral Colleters in the Orchids Elleanthus brasiliensis and E. crinipes

et al. 2019

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“…The structural and histochemical organisation of colleters in different plant families has been frequently described (see Lacchia et al 2016). However, in general, colleter biology remains poorly understood and studies addressing the attributes of colleter functioning and their association with the environment are scarce.…”

Section: Communicated By: Sven Thatjementioning

confidence: 99%

Colleters in Rubiaceae from forest and savanna: the link between secretion and environment

Tresmondi

Canaveze

Guimarães

et al. 2017

Sci Nat

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This study aims to investigate colleters' secretory function, on cellular level, in Rubiaceae species from contrasting environments looking to explore the association between secretion and environment. We collected samples from eight species of Rubiaceae growing in forest and savanna having standard-type colleters with diverse histochemistry (hydrophilic, lipophilic and mixed secretions) and processed for both conventional and cytochemical study under transmission electron microscopy (TEM). The standard colleters, although similar in morphology and anatomy, exhibited marked differences on cellular level, especially in the abundance and topology of Golgi bodies, endoplasmic reticulum and plastids when comparing forest and savanna species. These differences were clearly aligned with the chemical nature of the secretions they produce, with predominance of hydrophilic secretions in forest species and lipophilic or mixed secretions in savanna species. The combination of methods in electron microscopy revealed the sites of synthesis and intracellular compartmentation of substances, the mechanisms of their secretion from the protoplast and confirmed the involvement of the outer walls of the epithelial cells in the elimination of exudates to the gland surface. Our study suggests a potential environment-associated plasticity of the secretory cells of standard-type colleters in modulating their secretory function performance.

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“…Colleters are widely distributed on young vegetative and reproductive organs in plants and have been reported in ferns (Oliveira et al 2017), monocots (Leitão & Cortelazzo 2008;Mayer et al 2011;Cardoso-Gustavson et al 2014) and in sixty-five eudicots families (Thomas 1991;Muravnik et al 2014) such as Apocynaceae, Gentianaceae, Rubiaceae, (Thomas 1991;Renobales et al 2001;APG 2009;Lopes-Mattos et al 2015;Tresmondi et al 2015). Anacardiaceae (Lacchia et al 2016), Aquifoliaceae (González & Tarragó 2009), Euphorbiaceae (Machado et al 2015;Vitarelli et al 2015), Fabaceae (Barros & Teixeira 2016), Lecythidaceae (Paiva 2012), Moraceae (Machado et al 2013), Rutaceae (Macêdo et al 2016), Rhizophoraceae (Sheue et al 2012) and Myrtaceae (Silva et al 2012).…”

Section: Introductionmentioning

confidence: 99%

New registers of colleters in species of Myrtaceae from Brazilian Cerrado

2019

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Colleters are secretory structures that produce a sticky substance, consisting of a mixture of mucilage, proteins, terpenes, pectic substances and even alkaloids, which lubricates and protects the shoot apical meristem. Several colleter types have been described and have taxonomic value in many botanical families. In Myrtaceae, the colleters description is recent and presents three new morphological types (conic, euryform and petaloid) that differ those already described for other eudicots. In this work, we report the colleters morphological types in six species of three genera belonging to the Myrteae tribe of Myrtoideae from the Brazilian Cerrado. The samples were fixed for light and scanning electron microscopy. Histochemical tests were carried out on the fresh and methacrylate-embedded material. The conic and euryform colleters from Myrtoideae species of the Cerrado did not differ either morphologically nor as to the secretion nature from those described for Myrtoideae species from others biomes, which may indicate their potential use for taxonomic purposes. Considering the hypothesis that the multiple fleshy-fruit lineages have evolved independently in Myrteae tribe, our results indicate the relevance of additional studies in order to recognize the pattern of distribution of colleters in Myrtaceae.

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Foliar colleters in Anacardiaceae: first report for the family

Cited by 22 publications

References 34 publications

Deep in the Jelly: Histochemical and Functional Aspects of Mucilage-Secreting Floral Colleters in the Orchids Elleanthus brasiliensis and E. crinipes

Deep in the Jelly: Histochemical and Functional Aspects of Mucilage-Secreting Floral Colleters in the Orchids Elleanthus brasiliensis and E. crinipes

Colleters in Rubiaceae from forest and savanna: the link between secretion and environment

New registers of colleters in species of Myrtaceae from Brazilian Cerrado

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