HELPMEFIND PLANTS COMMERCIAL NON-COMMERCIAL RESOURCES EVENTS PEOPLE RATINGS
|
|
Fragrances of Species Roses Native to Japan
(Jul 2012) Page(s) 44-45. R. acicularis (Fig.1. b. slight, hardly noticeable scent).... ....the fragrances which the nine roses below give off were not so intense. They lacked highly fragrant components, and the amounts of the volatiles these roses emit were low: R. acicularis, R. nipponensis, R. fujisanensis, R. onoei var. hakonensis, R. onoei var. oligantha, R. paniculigera, R. luciae, R. luciae f. glandulifera and R. hirtula.
(Jul 2012) Page(s) 45. R. bracteata (Fig.1. o. sour-sweet scent reminding us of that of Japanese plum blossoms) .... .... benzyl acetate (54.9%) and benzyl alcohol (10.4%) in R. bracteata .... We classed R. sambucina and R. bracteata under the Unique group since their fragrances were found to contain some components rarely found in other roses, though they may be found in the flowers of other plants. The main component of the fragrance of R. sambucina was phenylacetaldehyde (49.6%), while that of R. bracteata was benzyl acetate (54.9%). .... Benzyl acetate, the main component of R. bracteata’s fragrance, is generated from benzyl alcohol (Fig.3) 12, 13), contained in the fragrances of R. rugosa and R. multiflora var. adenochaeta. While the fragrances of some other roses have been found to contain a small amount of benzyl acetate14), it was not a main component in any of them.
(Jul 2012) Page(s) 44-46. R. davurica var. alpestris (Fig.1. d. refreshing, sweet fragrance).... ....citronellol (19.3%), geraniol (33.2%), nerol (12.4%) and 2-phenylethanol (16.4%) in R. davurica var. alpestris.... Since R. rugosa and R. davurica var. alpestris were similar to damask rose in their fragrance compositions (Table 2), we classified them into the Damask-like group. However, the qualities of the fragrances of these three roses were felt to be different. While damask rose emitted an elegant scent with intense sweetness combined with what might be described as transparent gorgeousness, ......R davurica var. alpestris gave off a refreshing, sweet fragrance.
(Jul 2012) Page(s) 45. R. fujisanensis (Fig.1. g. faint fragrance reminding us of the smell of wood or earth) .... ....the fragrances which the nine roses below give off were not so intense. They lacked highly fragrant components, and the amounts of the volatiles these roses emit were low: R. acicularis, R. nipponensis, R. fujisanensis, R. onoei var. hakonensis, R. onoei var. oligantha, R. paniculigera, R. luciae, R. luciae f. glandulifera and R. hirtula.
(Jul 2012) Page(s) 45-46. R. hirtula (Fig.1. p. faint, slightly spicy and woody scent) .... ....the fragrances which the nine roses below give off were not so intense. They lacked highly fragrant components, and the amounts of the volatiles these roses emit were low: R. acicularis, R. nipponensis, R. fujisanensis, R. onoei var. hakonensis, R. onoei var. oligantha, R. paniculigera, R. luciae, R. luciae f. glandulifera and R. hirtula. ... We have also detected 4-vinylanisol15) and 4- vinylphenol in the faint fragrance of R. hirtula. These two substances are known to be unique components of the Myrrh fragrance in some roses. 16). Similar components have been found in the fragrance of R. arvensis (Table 3).
(Jul 2012) Page(s) 45. R. luciae (Fig.1. m. faint, hardly noticeable scent) .... ....the fragrances which the nine roses below give off were not so intense. They lacked highly fragrant components, and the amounts of the volatiles these roses emit were low: R. acicularis, R. nipponensis, R. fujisanensis, R. onoei var. hakonensis, R. onoei var. oligantha, R. paniculigera, R. luciae, R. luciae f. glandulifera and R. hirtula.
(Jul 2012) Page(s) 45. R. luciae f. glandulifera (Fig.1. n. faint, hardly noticeable scent) .... ....the fragrances which the nine roses below give off were not so intense. They lacked highly fragrant components, and the amounts of the volatiles these roses emit were low: R. acicularis, R. nipponensis, R. fujisanensis, R. onoei var. hakonensis, R. onoei var. oligantha, R. paniculigera, R. luciae, R. luciae f. glandulifera and R. hirtula.
(Jul 2012) Page(s) 46. We have further ascertained that the R. moschata, which has been used in producing perfumes in some countries in the Middle East, showed a close similarity to R. multiflora in that its fragrance had eugenol as well as 2-phenylethanol among its main components (Table2).
(Jul 2012) Page(s) 44-47. R. multiflora (Fig.1. e. clove-like spicy fragrance, far-reaching sweet fragrance).... .....eugenol (16.1%), geraniol (2.3%), geranyl acetate (8.7%), 2-phenylethanol (34.7%) and 2- phenylehtyl acetate (7.8%) in R. multiflora .... The main component of the fragrances of the following three roses: R. multiflora, R. multiflora var. adenochaeta, and R. onoei, was 2-phenylethanol, which we consider is responsible for their sweet fragrances. We classified these roses into one “Multiflora-like group”. Our analysis had revealed that eugenol is contained in the fragrance of R. multiflora. Eugenol adds the spicy note to the fragrance of R. multiflora, while many other components contribute to the deep and sophisticated feel to it......We have further ascertained that the R. moschata, which has been used in producing perfumes in some countries in the Middle East, showed a close similarity to R. multiflora in that its fragrance had eugenol as well as 2-phenylethanol among its main components (Table2)..... In an attempt to ascertain whether or not plants of the same species growing in different habitats may reveal different fragrance compositions, we made a comparative study of the fragrances obtained from R. multiflora plants in the habitats in Kisarazu, in Inba Pond area, and in Akita, and those from R. rugosa plants in their habitats in Niigata and in Hokkaido (Table 4). The result was that there was hardly any difference in the substances composing their fragrances, though some slight difference was found in their ratios..... We also tried to ascertain the change in fragrances according to the time of day. We analysed the fragrances of R. multiflora collected at different times of day (Fig.4). From the olfactory point of view, it was felt that the fragrance weakened as time passed. Among the main components of its fragrance – eugenol, geraniol, geranyl acetate, 2-phenylethanol – geraniol and geranyl acetate were lost toward the evening, but the ratio of 2-phenylethanol stayed the same, and as for eugenol, its ratio even tended to increase. It was supposed that eugenol largely contributed to the quality of the fragrance this rose emitted in the evening (Table 5). Actually we had an impression that the diffusive quality we felt in the morning in the fragrance of this species was lost in the evening.
(Jul 2012) Page(s) 44-45. R. multiflora var. adenochaeta (Fig.1. f. clear, refreshing, sweet fragrance) .... ....farnesol (8.3%), 2-phenylethanol (72.7%) and 2- phenyethyl acetate (2.4%) in R. multiflora var. adenochaeta ..... The main component of the fragrances of the following three roses: R. multiflora, R. multiflora var. adenochaeta, and R. onoei, was 2-phenylethanol, which we consider is responsible for their sweet fragrances. We classified these roses into one “Multiflora-like group”. Our analysis had revealed that eugenol is contained in the fragrance of R. multiflora. .....no eugenol had been detected among the fragrance components of R. multiflora var. adenochaeta.
|
|