Morphogenesis of Capitate Glandular Hairs of Cannabis sativa (Cannabaceae)

Hammond, Charles T.; Mahlberg, Paul G.

doi:10.2307/2442258

Cited by 44 publications

(37 citation statements)

References 7 publications

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“…This procedure was complicated by the fact that S. officinalis possesses five distinct types ofoil glands, including stalked capitate glands bearing a single terminal secretory cell, small sessile capitate glands containing one, two, or four secretory cells surmounting a basal and stem (stipe) cell, and large peltate glands containing eight secretory cells surmounting a basal and stem cell and entirely surrounded by an enlarged extracellular oil-filled cavity (35). Studies with related essential oil-producing species indicate that the sessile capitate glands with one, two, and four secretory cells are developmental stages in the formation of the large peltate glands (22)(23)(24)33). Light microscope and scanning electron microscope examination (Fig.…”

Section: Resultsmentioning

confidence: 99%

Relationship of Camphor Biosynthesis to Leaf Development in Sage (Salvia officinalis)

Croteau

Felton²,

Karp³

et al. 1981

Plant Physiol.

129

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The camphor content of sage (Saivia officinalis L.) leaves increases as the leaves expand, and the increase is roughly proportional to the number of filled peltate oil glands which appear on the leaf surface during the expansion process. "4CO2 is more rapidly incorporated into camphor and its direct progenitors in expanding leaves than in mature leaves, and direct in vitro measurement of the key enzymes involved in the conversion of geranyl pyrophosphate to camphor indicates that these enzymes, including the probable rate-limiting cyclization step, are at the highest levels during the period of maximum leaf expansion. These results clearly demonstrate that immature sage leaves synthesize and accumulate camphor most rapidly.

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Section: Resultsmentioning

confidence: 99%

Relationship of Camphor Biosynthesis to Leaf Development in Sage (Salvia officinalis)

Croteau

Felton²,

Karp³

et al. 1981

Plant Physiol.

129

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“…Like Hammond & Mahlberg (1977), they considered hop bulbous trichomes t o be morphologically similar to the bulbous trichomes of Cannabis sativa.…”

Section: Discussionmentioning

confidence: 99%

“…The release of secretion by cuticular rupture has been reported for several lipophilic glands, viz. Newcasrelia viscida (Dell & McComb 1975), Cannabis sativa (Hammond & Mahlberg 1977), hula viscosa (Werker & Fahn 1981), Thymus vulgaris (Bruni & Modenesi 1983) and Artemisia campesfris (Ascenstio & Pais 1987). The bulbous trichomes degenerate after rupture of the cuticle, as also found in Achillea trichomes (Stahl 1953).…”

Section: Discussionmentioning

confidence: 99%

Glandular trichomes of Humulus lupulus var. Brewer's Gold: Ontogeny and histochemical characterization of the secretion

Oliveira

Salomk

Pais

1988

Nordic Journal of Botany

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Leaves of Humulus lupulus possess two types of glandular trichomes: -peltate (lupulin) and bulbous. Peltate trichomes are formed from a protodermal cell by two anticlinal divisions in perpendicular planes, followed by two periclinal ones that give rise to the initials of the head cells, the basal and the stalk cells. Head cells divide successively in radial and irregular planes. Fully developed peltate trichomes are built of a glandular head consisting of 30 to 72 cells, four stalk cells and four basal cells. Bulbous trichomes are also formed from a protodermal cell by an anticlinal division followed by two periclinal ones that produce the initials of the glandular head cells, and the basal and stalk cells. Fully developed bulbous trichomes consist of four (occasionally eight) head glandular cells, two stalk cells and two basal cells. The density of peltate trichomes decreases with the expansion of the leaves. Both peltate and bulbous trichomes secrete essential oils. Peltate trichomes are the preferential site for the synthesis of bitter resins. Tannic acids could not be detected histochemically either in peltate or in bulbous trichomes. Both types of trichomes produce secretion that accumulates in the subcuticular space, being released, in the case of bulbous trichomes, by rupture of the cuticle.

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“…It is the location where the Δ 9 -tetrahydrocannabinol with other cannabinoids and terpenes are synthetizing (Hammond & Mahlberg, 1977).…”

Section: Discussionmentioning

confidence: 99%

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2017

Columella

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Morphogenesis of Capitate Glandular Hairs of Cannabis sativa (Cannabaceae)

Cited by 44 publications

References 7 publications

Relationship of Camphor Biosynthesis to Leaf Development in Sage (Salvia officinalis)

Relationship of Camphor Biosynthesis to Leaf Development in Sage (Salvia officinalis)

Glandular trichomes of Humulus lupulus var. Brewer's Gold: Ontogeny and histochemical characterization of the secretion

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