Oil Glands in <i>Pterodon pubescens</i> Benth. (Leguminosae-Papilionoideae): Distribution, Structure, and Secretion Mechanisms

Rodrigues, Tatiane Maria; Machado, Sílvia Rodrigues

doi:10.1086/667609

Cited by 27 publications

(28 citation statements)

References 35 publications

(49 reference statements)

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“…Secretory spaces with digitiform elongated epithelial cells intersecting the lumen and forming trabeculae, previously observed in P. pubescens by Rodrigues & Machado (2012), were found in all three species studied here. The trabeculae in the lumen of these secretory spaces probably play a functional role as a framework to support secretion inside the wide lumen of these glands, since secretion products accumulate within the interstices.…”

Section: Discussionsupporting

confidence: 81%

“…Secretory spaces have already been documented in some members of Dipteryx, Pterodon and Taralea (see Rodrigues & Machado 2004;Paiva et al 2008;Rodrigues & Machado 2012;Leite et al 2014), but are absent in Monoteryx (FH Palermo unpubl. res.…”

Section: Introductionmentioning

confidence: 95%

“…Secretory cavities and canals are common in vegetative (Lersten & Curtis 1986;Turner 1986;Teixeira & Gabrielli 2000;Marcati et al 2001;Paiva & Machado 2007;Rodrigues & Machado 2009;Teixeira & Rocha 2009;Rodrigues et al 2011a;b;Milani et al 2012;Rodrigues & Machado 2012) and reproductive (Paiva et al 2008;Teixeira & Rocha 2009;Leite et al 2014) organs of species of Leguminosae. Th ey produce and accumulate compounds involved with mechanisms of defense against herbivores and pathogens, and therefore are responsible for ecological interactions (Fahn 1979;Langenheim 2003).…”

Section: Introductionmentioning

confidence: 99%

“…However, data of the presence of secretory structures in the vegetative axis of these species are scarce and refer only to P. pubescens (Rodrigues & Machado 2012). In this study, we analyzed the morphology and histochemistry of the secretory spaces in leaves and young stems of D. alata, P. pubescens, and T. oppositifolia.…”

Section: Introductionmentioning

confidence: 99%

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Secretory spaces in species of the clade Dipterygeae (Leguminosae, Papilionoideae)

et al. 2017

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Dipteryx, Pterodon and Taralea are legume genera known for secreting oils, produced in secretory canals and cavities, with medicinal properties. We analyzed the distribution, morphology and histochemistry of these glands in leaves and stems of Dipteryx alata, Pterodon pubescens and Taralea oppositifolia, three Neotropical species, using standard techniques for anatomy and histochemistry. Secretory spaces, i.e. secretory cavities and canals, exhibited a wide lumen and a single layer of epithelium. Digitiform epithelial cells, forming trabeculae protruding into the lumen, were seen in all three species. Secretory cavities with a rounded or oval lumen and secretory canals with an elongated lumen in longitudinal sections were found only in T. oppositifolia. In D. alata and P. pubescens, only secretory cavities were found. In P. pubescens, secretory cavities occurred in the leaf blade margin. In T. oppositifolia, secretory spaces were much more numerous than in the other two species. Terpenes, total lipids, phenolic compounds, alkaloids and polysaccharides were detected in the secretory spaces of the three species. Th e abundance of secretory spaces, the presence of canals in T. oppositifolia and the position of cavities in P. pubescens are features with potential diagnostic value for their respective genera.

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Section: Discussionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secretory spaces in species of the clade Dipterygeae (Leguminosae, Papilionoideae)

et al. 2017

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“…Total lipids and terpenes were abundantly stained by the histochemical tests in the morphotype I, mainly in the head cells. In fact, the observation of several plastids lacking thylakoids in the head cells is associated with the production of oils (Fahn 1979;Rodrigues & Machado 2012); in addition, the presence of tubular inclusions in these plastids is common reported in cells secreting monoterpenes (Turner et al 1999). In general way, lipids are released from the secretory cells via ecrine (Evert 2006), cross the cell wall driven by the mechanical pressure exercised by the protoplast (Paiva 2016) and accumulate in the subcuticular space; oil material can cross the cuticle and reach the outer side of the cells without requiring rupture of pore formation in the cuticle.…”

Section: Discussionmentioning

confidence: 99%

Morphology and histochemistry of glandular trichomes in Hyptis villosa Pohl ex Benth. (Lamiaceae) and differential labeling of cytoskeletal elements

Tozin

Rodrigues

2016

Acta Bot. Bras.

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Lamiaceae contains many species known for their aromatic properties that are produced by the production of essential oils in glandular trichomes. Hyptis is one of the most common genera of Lamiaceae in the Brazilian fl ora, and includes several species with medicinal value. However, studies on the morphology and functioning of their glandular trichomes are lacking. We analyzed the morphology, histochemistry and ultrastructure of the glandular trichomes in leaves of H. villosa, emphasizing the diff erential distribution of actin fi laments and microtubules in cells secreting hydrophilic and lipophilic compounds. Four morphotypes of glandular trichomes were identifi ed. Total lipid, terpenes, alkaloids, phenolic compounds, proteins and polysaccharides were histochemically detected in all morphotyes. Th is evidences the mixed nature of the secretions of this species, although there are diff erences in the prevalence of lipophilic and hydrophilic components among the glandular morphotypes and among the cells of the same trichome. Th e actin microfi laments are more abundant in cells that secrete mainly hydrophilic compounds, and microtubules predominate in cells that secrete lipophilic compounds. Our results corroborate the correlation between the glandular morphotype and the composition of the secretion produced, with a diff erential distribution of the cytoskeletal elements according to the prevalence of either hydrophilic or lipophilic substances.

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The Structural Peculiarities of the Leaf Glandular Trichomes: A Review

Muravnik

2020

Reference Series in Phytochemistry

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Leaf glandular trichomes are multicellular secretory structures that arise from protodermal cells. They are characterized by a diverse form, localization, density, and composition of secreted substances. Formation of the glandular trichomes is caused by the need to protect plants from various biotic and abiotic factors, including herbivorous insects, fungi, pathogens, extensive light, UVB radiation, or high temperature. The main feature of the glandular trichomes is an ability to synthesize and accumulate the various compounds of primary and secondary metabolism. Morphology, development, ultrastructural characteristics of the cells producing the secondary compounds, content of the secretory products, as well as mechanisms of secretion are discussed in this chapter.

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Oil Glands in Pterodon pubescens Benth. (Leguminosae-Papilionoideae): Distribution, Structure, and Secretion Mechanisms

Cited by 27 publications

References 35 publications

Secretory spaces in species of the clade Dipterygeae (Leguminosae, Papilionoideae)

Secretory spaces in species of the clade Dipterygeae (Leguminosae, Papilionoideae)

Morphology and histochemistry of glandular trichomes in Hyptis villosa Pohl ex Benth. (Lamiaceae) and differential labeling of cytoskeletal elements

The Structural Peculiarities of the Leaf Glandular Trichomes: A Review

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