Colleters in monocots: New record for Orchidaceae

Mayer, Juliana Lischka Sampaio; Cardoso‐Gustavson, Poliana; Appezzato‐da‐Glória, Beatriz

doi:10.1016/j.flora.2010.09.003

Cited by 56 publications

(44 citation statements)

References 25 publications

(25 reference statements)

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“…Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications may indicate that they play an important functional role in keeping young structures hydrated (Fahn & Cutler 1992). Lipids have been detected in the colleter secretion of species belong Apocynaceae (Appezzato-da-Glória & Estelita 2000), Leguminosae (Paiva 2009), Gentianaceae (Dalvi et al 2013), Orchidaceae (Mayer et al 2011) and Rubiaceae (Machado et al 2012;Tullii et al 2013). As claimed for polysaccharides, lipid compounds may help avoid water loss, in addition to prohibiting fungal and microorganism attack, since this hydrophobic substance lubricates the surface of young leaves and floral buds, (Fahn 1979;Thomas & Dave 1989;Thomas 1991;Evert 2006;Paiva 2009;Mayer et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…As claimed for polysaccharides, lipid compounds may help avoid water loss, in addition to prohibiting fungal and microorganism attack, since this hydrophobic substance lubricates the surface of young leaves and floral buds, (Fahn 1979;Thomas & Dave 1989;Thomas 1991;Evert 2006;Paiva 2009;Mayer et al 2013). Proteins have also been reported as a component of the secretion produced by colleters from a variety of different species (Thomas & Dave 1990;Klein et al 2004;Miguel et al 2006;González & Tarragó 2009;Mayer et al 2011;Dalvi et al 2013). Some authors have suggested that such proteins may provide additional protection from fungi and parasites (Miguel et al 2006;Vieira et al 2006;Mayer et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Proteins have also been reported as a component of the secretion produced by colleters from a variety of different species (Thomas & Dave 1990;Klein et al 2004;Miguel et al 2006;González & Tarragó 2009;Mayer et al 2011;Dalvi et al 2013). Some authors have suggested that such proteins may provide additional protection from fungi and parasites (Miguel et al 2006;Vieira et al 2006;Mayer et al 2011). However, research aiming to unravel how exudates produced by colleters may contribute to the success of species of Chamaecrista in stressful environments is still needed.…”

Section: Discussionmentioning

confidence: 99%

“…Although Lersten (1974) pointed out that the standard type of colleter is the most widespread, variation in the morphoanatomy of these structures has since been observed such that now several different types of colleters are recognized (Mayer et al 2011;Silva et al 2012;Coutinho et al 2015). Standard type colleters are comprised of a secretory palisade epidermis covering a non-secretory central axis, which may or may not be vascularized with xylem and phloem (Lersten 1974).…”

Section: Discussionmentioning

confidence: 99%

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Colleters in Chamaecrista (L.) Moench sect. Chamaecrista and sect. Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications

et al. 2017

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Th e genus Chamaecrista contains ca. 330 species organized into six sections, of which section Chamaecrista is the second largest (ca.75 species) distributed among six series, while the section Caliciopsis contains only two species. Colleters have been described in the genus Chamaecrista and they show potential taxonomic and phylogenetic signifi cance. Th ey are associated with lubrication, desiccation prevention and protection from microbial attacks of young developing organs. Although six types of colleters have been described for the genus Chamaecrista, there have been no studies focusing on the diversity of colleters in the sections Chamaecrista and Caliciopsis. Samples from developing leaves and fl owers of both sections were obtained from herbarium and fi eld collections and subjected to standard methodologies for both light and scanning electron microscopy. Histochemical tests were also performed to determine the nature of the exudates. Five types of non-vascularized colleters were found: short digitiform, long digitiform, club-shaped, pyriform and short bottle-shaped. Polysaccharides, pectins, lipids and proteins were detected in the exudates of all types of colleters. Among the fi ve types of colleters observed, pyriform is a novelty for Chamaecrista, reinforcing the signifi cant morphological diversity of these secretory structures in this genus.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Colleters in Chamaecrista (L.) Moench sect. Chamaecrista and sect. Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications

et al. 2017

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“…A presença dos tricomas inteiros e com secreção de polissacarídeos totais durante a fase jovem da folha em B. perii e tricomas colapsados ou cicatrizes de tricomas caducos na folha adulta, podem indicar uma função de coléter, segundo o conceito utilizado por Fahn (1979), Leitão & Cortelalazzo (2008), Mayer et al (2011) e Cardoso et al (2014.…”

Section: Discussionunclassified

Anatomia comparada dos órgãos vegetativos de espécies de Bulbophyllum seção Didactyle (Lindl.) Cogn. e Bulbophyllum seção Xiphizusa Rchb.f. (Orchidaceae)

Piazza

Smidt

Bona

2015

Hoehnea

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Bulbophyllum sect. Didactyle e B.sect. Xiphizusa são grupos monofiléticos irmãos, inseridos no clado neotropical do gênero. As espécies ocorrem como epífitas ou rupícolas em áreas montanhosas com predomínio dos campos rupestres. O objetivo foi descrever comparativamente a anatomia dos órgãos vegetativos de 13 espécies dessas seções. O trabalho evidencia pela primeira vez a secreção lipofílica dos tricomas na folha jovem; caracteres xeromorfos uniformes entre as duas seções, como a cutícula espessa, presença de idioblastos, parênquima aquífero e fibras junto aos feixes vasculares; a ausência de cristais prismáticos na raiz e bulbo nas espécies de B.sect. Didactyle e a ausência de idioblastos com espessamento espiralados na raiz, espessamento na parede epidérmica do pseudobulbo e predomínio de mesofilo heterogêneo nas folhas das espécies de B. sect. Xiphizusa podem ser considerados estados de caractere sinapomórficos para as seções mostrando a importância da anatomia em estudos sistemáticos.

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Ecological and phylogenetic constraints determine the stage of anthetic ovule development in orchids

Mayer

Scopece

Lumaga

et al. 2021

American J of Botany

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Premise Unlike most flowering plants, orchid flowers have under‐developed ovules that complete development only after pollination. Classical studies reported variation in the stage in which ovule development is arrested, but the extent of this variation and its evolutionary and ecological significance are unclear. Methods Here, we used light microscopy to observe ovule development at anthesis for 39 species not previously studied and surveyed the literature gaining information on 94 orchid species. Tropical and temperate members of all five orchid subfamilies as well as species with contrasting pollination strategies (rewarding versus deceptive) and life forms (epiphytic versus terrestrial) were represented. We analyzed the data using statistical comparisons and a phylogenetic generalized least square (PGLS) analysis. Results Apostasioideae, the sister to the rest of the orchids, have mature ovules similar to other Asparagales, while under‐differentiated ovules are present in the other subfamilies. Ovule developmental stages showed high variation even among closely related groups. Ovules were more developed in terrestrial than in epiphytic, in temperate than in tropical, and in rewarding than in deceptive pollination orchid species. This latter comparison was also significant in the PGLS analysis. Conclusions These results suggest that ovule developmental stage in orchids can be shaped by ecological factors, such as seasonality and pollination strategy, and can be selected for optimizing female reproductive investment.

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Colleters in monocots: New record for Orchidaceae

Cited by 56 publications

References 25 publications

Colleters in Chamaecrista (L.) Moench sect. Chamaecrista and sect. Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications

Colleters in Chamaecrista (L.) Moench sect. Chamaecrista and sect. Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications

Anatomia comparada dos órgãos vegetativos de espécies de Bulbophyllum seção Didactyle (Lindl.) Cogn. e Bulbophyllum seção Xiphizusa Rchb.f. (Orchidaceae)

Ecological and phylogenetic constraints determine the stage of anthetic ovule development in orchids

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