Sesquiterpene lactones and flavanones in Scalesia species

Spring, Otmar; Heil, Norbert; Vogler, Bernhard

doi:10.1016/s0031-9422(97)00464-0

Cited by 32 publications

(15 citation statements)

References 10 publications

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“…3bOH, 4bH, was determined indirectly via 2D NMR study of 4 (vide infra). It should also be noted that the gross structure of 2 was identical to that of the previously reported 15-hydroxyzaluzanin C (Spring et al, 1997(Spring et al, , 1999. However, different chemical shifts of H-3 and H 2 -15 in comparison to those reported for 15-hydroxyzaluzanin could be interpreted in terms of different relative configuration at C-4.…”

Section: Resultssupporting

confidence: 76%

Guaianolides from two subspecies of Amphoricarpos neumayeri from Montenegro

Djordjević¹,

Vajs²,

Bulatovic³

et al. 2004

Phytochemistry

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Section: Resultssupporting

confidence: 76%

Guaianolides from two subspecies of Amphoricarpos neumayeri from Montenegro

Djordjević¹,

Vajs²,

Bulatovic³

et al. 2004

Phytochemistry

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“…Significant sources of leaf surface secondary metabolites are the glandular trichomes, structures present on plant surfaces (also in L. ericoides leaves) that produce and accumulate and/or secrete a wide range of secondary metabolites. This is especially the case for metabolites with defensive/protective roles, such as sesquiterpene lactones, flavonoids and monoterpenes 6–10…”

mentioning

confidence: 99%

Negative ion ‘chip‐based’ nanospray tandem mass spectrometry for the analysis of flavonoids in glandular trichomes of Lychnophora ericoides Mart. (Asteraceae)

Gobbo‐Neto

Gates

Lopes

2008

Rapid Comm Mass Spectrometry

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This paper reports a method for the analysis of secondary metabolites stored in glandular trichomes, employing negative ion 'chip-based' nanospray tandem mass spectrometry. The analyses of glandular trichomes from Lychnophora ericoides, a plant endemic to the Brazilian 'cerrado' and used in traditional medicine as an anti-inflammatory and analgesic agent, led to the identification of five flavonoids (chrysin, pinocembrin, pinostrobin, pinobanksin and 3-O-acetylpinobanksin) by direct infusion of the extracts of glandular trichomes into the nanospray ionisation source. All the flavonoids have no oxidation at ring B, which resulted in a modification of the fragmentation pathways compared with that of the oxidised 3,4-dihydroflavonoids already described in the literature. The absence of the anti-inflammatory and antioxidant di-C-glucosylflavone vicenin-2, or any other flavonoid glycosides, in the glandular trichomes was also demonstrated. The use of the 'chip-based' nanospray QqTOF apparatus is a new fast and useful tool for the identification of secondary metabolites stored in the glandular trichomes, which can be useful for chemotaxonomic studies based on metabolites from glandular trichomes.

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“…Authors showed that the free lipophilic flavonoid aglycones together with monoterpenes are located in the peltate glands. After using glass microcapillaries and following analyses by GC-MS or HPLC, an accumulation of monoterpenoid nepetalactones was found in the subcuticular cavity of the peltate glandular trichomes in Nepeta racemosa [49], as well as sesquiterpene lactones and flavonoids were detected in the capitate glandular trichomes of various Scalesia species [133].…”

Section: Chemical Content Of Secretionmentioning

confidence: 99%

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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Sesquiterpene lactones and flavanones in Scalesia species

Cited by 32 publications

References 10 publications

Guaianolides from two subspecies of Amphoricarpos neumayeri from Montenegro

Guaianolides from two subspecies of Amphoricarpos neumayeri from Montenegro

Negative ion ‘chip‐based’ nanospray tandem mass spectrometry for the analysis of flavonoids in glandular trichomes of Lychnophora ericoides Mart. (Asteraceae)

The Structural Peculiarities of the Leaf Glandular Trichomes: A Review

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