Adhesive secretion in Schizolobium parahyba (Vell.) Blake (Leguminosae: Caesalpinioideae): histochemical and morpho-functional characterization of this unusual feature in woody plants

Paiva, Élder Antônio Sousa; Oliveira, Denise María Trombert; Canaveze, Yve; Machado, Sílvia Rodrigues

doi:10.1007/s11829-022-09888-y

Cited by 4 publications

(4 citation statements)

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“…Our study reveals the existence of a subcellular compartmentalization of terpenes/phenols biosynthesis and suggests the directional movement of these substances in the gland cells, in accordance with reported for other plant species (Turner & Croteau 2004;Machado et al 2006;Kowalkowska et al 2015;Naczk et al 2018;Buarque et al 2020;Paiva et al 2022). Recent findings consider the mitochondrial contribution to synthesis of terpenes, in addition to the plastids and cytosol (Pazouki & Niinemets 2016).…”

Section: Cytological Events Linked To the Secretory Processsupporting

confidence: 91%

“…2018; Paiva et al . 2022). The secretory products then accumulate in the periplasmic space, diffuse through the cell walls, and accumulate beneath the cuticle that gradually separates from the cell wall.…”

Section: Discussionmentioning

confidence: 99%

“…2020; Paiva et al . 2022). Recent findings consider the mitochondrial contribution to synthesis of terpenes, in addition to the plastids and cytosol (Pazouki & Niinemets 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Presence of the irregular plasmalemma, with vesicles building into it, has been associated with granulocrine secretion and widely described in different secretory cells (Fahn 1988;Stpiczy nska 2001;Kowalkowska et al 2012Kowalkowska et al , 2015Naczk et al 2018;Paiva et al 2022). The secretory products then accumulate in the periplasmic space, diffuse through the cell walls, and accumulate beneath the cuticle that gradually separates from the cell wall.…”

Section: Cytological Events Linked To the Secretory Processmentioning

confidence: 99%

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Peltate trichomes in the dormant shoot apex of Metrodorea nigra, a Rutaceae species with rhythmic growth

et al. 2022

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In Metrodorea nigra, a Rutaceae species with rhythmic growth, the shoot apex in the dormant stage is enclosed by modified stipules. The young organs are fully covered with peltate secretory trichomes, and these structures remain immersed in a hyaline exudate within a hood-shaped structure. Our study focused on the morpho-functional characterization of the peltate trichomes and cytological events associated with secretion.• Shoot apices were collected during both dormant and active stages and processed for anatomical, cytochemical and ultrastructural studies.• Trichomes initiate secretion early on, remain active throughout leaf development, but collapse as the leaves expand; at which time secretory cavities start differentiation in the mesophyll and secretion increases as the leaf reaches full expansion. The subcellular apparatus of the trichome head cells is consistent with hydrophilic and lipophilic secretion. Secretion involves two vesicle types: the smaller vesicles are PATAg-positive (periodic acid/thiocarbohydrazide/silver proteinate) for carbohydrates and the larger ones are PATAg-negative. In the first phase of secretory activity, the vesicles containing polysaccharides discharge their contents through exocytosis with the secretion accumulating beneath the cuticle, which detaches from the cell wall. Later, a massive discharge of lipophilic substances (lipids and terpenes/phenols) results in their accumulation between the wall and cuticle. Release of the secretions occurs throughout the cuticular microchannels.• Continued protection of the leaves throughout shoot development is ensured by replacement of the collapsed secretory trichomes by oil-secreting cavities. Our findings provide new perspectives for understanding secretion regulation in shoot apices of woody species with rhythmic growth.

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Section: Cytological Events Linked To the Secretory Processsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

“…2020; Paiva et al . 2022). Recent findings consider the mitochondrial contribution to synthesis of terpenes, in addition to the plastids and cytosol (Pazouki & Niinemets 2016).…”

Section: Discussionmentioning

confidence: 99%