Phytosterol Composition in the Pollen of Sunflower,<i>Helianthus annuus</i>L.

Takatsuto, Suguru; Omote, Kumiko

doi:10.1080/00021369.1989.10869818

Cited by 3 publications

(3 citation statements)

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“…An important step in understanding sterol metabolism in biological systems relies upon the characterisation of their sterol composition (sterolome). Traditionally, sterols have been identified chromatographically (Svoboda et al, 1983b ; Svoboda & Lusby, 1986 ; Svoboda et al, 1980 ), with gas chromatography-mass spectrometry used more recently (Lusby et al, 1993 ; Pilorget et al, 2010 ; Takatsuto & Omote, 1989 ; Zu et al, 2021 ). Methods for profiling the sterol composition using liquid chromatography-mass spectrometry have been reported (Honda et al, 2010 ) as has comprehensive natural product discovery and structural determination using a combination of mass spectrometry and NMR (Kodai et al, 2007 ).…”

Section: Sterolsmentioning

confidence: 99%

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Sterol and lipid metabolism in bees

Furse,

Koch,

Wright

et al. 2023

Metabolomics

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Background Bees provide essential pollination services for many food crops and are critical in supporting wild plant diversity. However, the dietary landscape of pollen food sources for social and solitary bees has changed because of agricultural intensification and habitat loss. For this reason, understanding the basic nutrient metabolism and meeting the nutritional needs of bees is becoming an urgent requirement for agriculture and conservation. We know that pollen is the principal source of dietary fat and sterols for pollinators, but a precise understanding of what the essential nutrients are and how much is needed is not yet clear. Sterols are key for producing the hormones that control development and may be present in cell membranes, where fatty-acid-containing species are important structural and signalling molecules (phospholipids) or to supply, store and distribute energy (glycerides). Aim of the review In this critical review, we examine the current general understanding of sterol and lipid metabolism of social and solitary bees from a variety of literature sources and discuss implications for bee health. Key scientific concepts of review We found that while eusocial bees are resilient to some dietary variation in sterol supply the scope for this is limited. The evidence of both de novo lipogenesis and a dietary need for particular fatty acids (FAs) shows that FA metabolism in insects is analogous to mammals but with distinct features. Bees rely on their dietary intake for essential sterols and lipids in a way that is dependent upon pollen availability.

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Section: Sterolsmentioning

confidence: 99%

“…The pollen of Alnus glutinosa and Calluna vulgaris is mainly ß-sitosterol (C 29 , δ5; Standifer et al, 1968 ; Vanderplanck et al, 2020 ), whereas that of Helianthus spp. is mainly avenasterol (C 29 , δ7; Takatsuto & Omote, 1989 ) (For structural guide, see Fig. 1 A).…”

Section: Sterolsmentioning

confidence: 99%

Sterol and lipid metabolism in bees

Furse,

Koch,

Wright

et al. 2023

Metabolomics

View full text Add to dashboard Cite

show abstract

“…Helium was used as the carrier gas at a rate of 1.0 mL min − 1 . The identification of the extracted compounds as TMS derivatives was done by comparison of the mass spectra fragmentation with those from the Wiley-NIST library, literature [34][35][36][37], and when possible, by comparison with standards. For quantitative analysis, GC-MS was calibrated with pure reference compounds (mannose, trans-ferulic acid, nonadecan-1-ol, eicosan-1-ol, 5α-chlolestane, cholesterol, stigmasterol, hexadecanoic, and nonadecanoic acids) relative to tetracosane (internal standard).…”

Section: Gas Chromatography-mass Spectrometry (Gc-ms) Analysismentioning

confidence: 99%