Unterschiede

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--- rosa_centifolia [2017/06/16 07:33] – andreas
+++ rosa_centifolia [2022/04/28 12:34] (aktuell) – andreas
@@ Zeile 1: / Zeile 1: @@
-Rosa × centifolia - Rosaceae - provence rose, rose de Mai, cabbage rose, **Provence-Rose**, Zentifolie, Kohl-Rose
+Rosa × centifolia - Rosaceae - provence rose, Rose de Mai, cabbage rose, **Provence-Rose**, Zentifolie, Kohl-Rose
 Old hybrid rose developed by Dutch rose breeders in 16th and 17th century; flowers globular, petals numerous, pink, white or dark red, highly scented; cultivated in Egypt, France (Provence: Grass) and Morocco.
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 Pentane/dichloromethane extracts of Rosa x centifolia petals showed phenylethanol as the main component (56-86%), followed by hydrocarbons (8.5-23.5%). Other components were benzyl alcohol (0.8-4.9%), nerol (1.0-4.9%), geraniol (0.7-13.6%), geranyl acetate (0.2-1.6%), benzyl benzoate (0.1-0.7%), octanal (0.01-0.1%), and nonanal/cis-rose oxide (0.01-0.09%). "The composition of the four samples of R. × centifolia can be divided into two classes. Compared to roses 8 and 11, roses 9 and 10 were characterized by lower contents of nerol, geraniol, and geranyl acetate. The similarity of roses 9 and 10 is genetical: rose 10 (Old Pink Moss) was derived by a mossed mutation of rose 9 (R. centifolia). No other compounds stood out, and the differences among four R. centifolia cultivars and all other cultivars were of the same amplitude." \\
 [Characterization of 24 old garden roses from their volatile compositions., Antonelli, A., Fabbri, C., Giorgioni, M.E., Bazzocchi, R., Journal of Agricultural and Food Chemistry, 45(11), 1997, 4435-4439]
+| {{:phenylethanol.jpg| 2-phenylethanol}} \\ 2-phenylethanol| {{:benzyl_alcohol.png| benzyl alcohol}} \\ benzyl alcohol | {{geraniol.jpg| geraniol }} \\ geraniol|{{nerol.png| nerol }} \\ nerol| {{:geranylacetate.jpg|geranyl acetate}} \\ geranyl acetate| {{:linalool.jpg|linalool}} \\ linalool |
 R.centifolia flower absolute (CAS 84604-12-6) is made from concrete oil (petrol ether extract of the rose petals) by dissolving in a minimum volume of absolute alcohol to remove the natural waxes and then distill the alcohol off (and finally bubbling nitrogen gas through the residue). \\
 Rosa centifolia petals produced 0.225% concrete oil and 0.128% absolute oil. Analysis of the essential oil of R. centifolia showed phenylethanol (43.0%), geranyl acetate (15.6%), geraniol (10.5%) and linalool (6.9%) as major components. Benzyl alcohol (3.3%), benzaldehyde (1.5%) and citronellyl acetate (0.3%) were minor constituents beside unidentified compounds. \\
 [Physico-chemical analysis and determination of various chemical constituents of essential oil in Rosa centifolia. Shabbir, M.K., Nadeem, R., Mukhtar, H., Anwar, F., Mumtaz, M. W., Pak. J. Bot, Vol.41(2), 2009, 615-620] [[http://pakbs.org/pjbot/PDFs/41%282%29/PJB41%282%29615.pdf]]
+Application of GC-HRMS to rose absolutes of R.centifolia and R.damascena confirmed the identification of 19 new esters like the linoleates and linolenates of phenylethanol, citronellol, nerol and geraniol. "With these identified esters, the known volatile fraction of rose absolute increased from 90 percent to 92." \\
+[Remy, Pierre‐Alain, et al. "Identification of novel compounds in rose absolute with gas chromatography/high‐resolution mass spectrometry." Flavour and Fragrance Journal 37.3 (2022): 133-143]
 {{:rosa_centifolia.jpg|}} \\
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 [[http://plantgenera.org/species.php?id_species=1260556]]
+----
+Rosa × centifolia ‚Muscosa‘ (Rosa ×centifolia forma muscosa; **Moosrose**)
+"Parsley-like curled, green leaf outgrowths and the oil glands make the calyx and flower stalks look like moss. This moss - especially the bud that opens up - is what makes this rose so attractive. The resin, which is sticky to the touch, smells very spicy when the leaves and stems are rubbed between the fingers."
+[[https://de.wikipedia.org/wiki/Moosrose]]
+| {{:phenylethanol.jpg| 2-phenylethanol}} \\ 2-phenylethanol| {{citronellol.jpg| citronellol }} \\ citronellol| {{:phenylethylacetate.jpg|2-phenylethyl acetate}} \\ 2-phenylethyl acetate| {{:myrcene.jpg|myrcene}} \\ myrcene|
+Main components of the headspace of Rosa muscosa purpurea flowers collected on Tenax were phenylethanol (29.9%), geraniol (20.6%), citronellol (16.3%),  and phenylethyl acetate (7.1%) and that way not very different from [[rosa_rugosa_thunb|Rosa rugosa]]. "The presence of myrcene (6.6%) accounts for a more balsamic, resinous smell." \\
+[Flament, I., C. Debonneville, and A. Furrer. „Volatile constituents of roses: characterization of cultivars based on the headspace analysis of living flower emissions.“ chapter in: Volatile compounds from Flowers, Teranishi, R.;Buttery, R. G.;Sugisawa, H. Bioactive volatile compounds from plants. (Book) 1993, 269-281]
 Moss roses are old garden roses which flower pedicel and calyx are covered with a green to brown mossy growth. Historically, the first moss roses to be obtained were not sported from R. × centifolia (cabbage rose). \\
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-{{:rosa_centifolia_botg.jpg?800}} \\
+{{:dsc05661k.jpg}} \\
-Rosa × centifolia ‚Muscosa‘, [[https://de.wikipedia.org/wiki/Moosrose|Moosrose]]
+Rosa × centifolia ‚Muscosa‘, [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], Author: Andreas Kraska