| Beide Seiten der vorigen Revision
Vorhergehende Überarbeitung
Nächste Überarbeitung
|
Vorhergehende Überarbeitung
Nächste Überarbeitung
Beide Seiten der Revision
|
vanilla_tahitensis_j.w._moore [2017/08/12 16:17]
andreas |
vanilla_tahitensis_j.w._moore [2017/10/30 10:16]
andreas |
| Vanilla tahitensis J.W. Moore - Orchidaceae - Tahitian vanilla, **Tahiti-Vanille** | Vanilla tahitensis J.W. Moore - Orchidaceae - Tahitian vanilla, **Tahiti-Vanille** |
| |
| Evergreen vine, native (only known in cultivation) to Tahiti, cultivated elsewhere. | Evergreen vine, native (only known in cultivation) to Tahiti, cultivated elsewhere; stems zizagging; leaves alternate, short-petioled, up to 20cm long; flowers in lateral spikes, pale yellowish-green, petals and sepals narrow, lip fringe-edged, inside striped yellow-orange, shorter than petals. [[http://cookislands.bishopmuseum.org/species.asp?id=14082]] |
| |
| "In the literature there is contradictory information on the compounds of Tahiti vanilla, particularly concerning the piperonal content. Because of this, Tahitian beans and Tahiti vanilla resinoid were analysed by HPLC. Compared with results obtained on Vanilla planifolia, the Tahitian beans contained relatively low amounts of vanillin and vanillic acid, relatively high amounts of p-hydroxybenzoic acid and considerable amounts of anisic acid and anisyl alcohol. Furthermore, although anisaldehyde was detectable, 3-ethoxy-4-hydroxy-benzaldehyde (“ethylvanillin”), coumarin and piperonal were not. The resinoid contained the same compounds as the beans in the expected amounts and ratios. It has to be supposed that reports of positive piperonal results refer to research on adulterated vanilla beans." \\ | "In the literature there is contradictory information on the compounds of Tahiti vanilla, particularly concerning the piperonal content. Because of this, Tahitian beans and Tahiti vanilla resinoid were analysed by HPLC. Compared with results obtained on Vanilla planifolia, the Tahitian beans contained relatively low amounts of vanillin and vanillic acid, relatively high amounts of p-hydroxybenzoic acid and considerable amounts of anisic acid and anisyl alcohol. Furthermore, although anisaldehyde was detectable, 3-ethoxy-4-hydroxy-benzaldehyde (“ethylvanillin”), coumarin and piperonal were not. The resinoid contained the same compounds as the beans in the expected amounts and ratios. It has to be supposed that reports of positive piperonal results refer to research on adulterated vanilla beans." \\ |
| "Special mention is necessary for the enigmatic V. x tahitensis J.W.Moore, described from Tahiti, but apparently introduced to the botanic garden at Papeete from Manila, Philippines in 1848, together with the true V. planifolia (Pétard 1986: 123; Hermann et al. 1989: 20). Vanilla tahitensis is very similar in morphology to some Central American taxa, and very different from the Old World vanillas... data indicate clearly that V. tahitensis is very closely related to V.odorata. Vanilla tahitensis is clearly a member of the American fragrant clade of vanilla, characterized by leafy plants and penicillate calluses, and which is absent in the Old World Tropics (as in New Guinea where the vanillas geographically nearest to Tahiti occur), therefore the hypothesis that it was introduced recently to Tahiti is strongly supported. Since vegetatively it has much broader leaves than V.odorata, it is almost certain that it is not conspecific with this species. The flower is larger than in V. planifolia, and it is rather intermediate in all traits between V. planifolia and V. odorata." \\ | "Special mention is necessary for the enigmatic V. x tahitensis J.W.Moore, described from Tahiti, but apparently introduced to the botanic garden at Papeete from Manila, Philippines in 1848, together with the true V. planifolia (Pétard 1986: 123; Hermann et al. 1989: 20). Vanilla tahitensis is very similar in morphology to some Central American taxa, and very different from the Old World vanillas... data indicate clearly that V. tahitensis is very closely related to V.odorata. Vanilla tahitensis is clearly a member of the American fragrant clade of vanilla, characterized by leafy plants and penicillate calluses, and which is absent in the Old World Tropics (as in New Guinea where the vanillas geographically nearest to Tahiti occur), therefore the hypothesis that it was introduced recently to Tahiti is strongly supported. Since vegetatively it has much broader leaves than V.odorata, it is almost certain that it is not conspecific with this species. The flower is larger than in V. planifolia, and it is rather intermediate in all traits between V. planifolia and V. odorata." \\ |
| [A revision of the Mexican and Central American species of Vanilla Plumier ex Miller with a characterization of their ITS region of the nuclear ribosomal DNA., Arenas, M.A.S., Dressler, R.L., Lankesteriana, 9(3), 2009, 285-354] [[http://www.revistas.ucr.ac.cr/index.php/lankesteriana/article/viewFile/12065/11354]] | [A revision of the Mexican and Central American species of Vanilla Plumier ex Miller with a characterization of their ITS region of the nuclear ribosomal DNA., Arenas, M.A.S., Dressler, R.L., Lankesteriana, 9(3), 2009, 285-354] [[http://www.revistas.ucr.ac.cr/index.php/lankesteriana/article/viewFile/12065/11354]] |
| | |
| | "Less than one part per million of heliotropin is accurately detected in authentic Tahitian vanilla beans... This confirms previous observations, which had shown that 4-methoxyaromatic compounds are the characteristic element in the flavor of Tahitian vanilla, with p-anisaldehyde as the main aroma donor." \\ |
| | [Heliotropin, heliotrope odor and Tahitian vanilla flavor: the end of a saga?., Joulain, D., Laurent, R., Masson, J., Beolor, J. C., Brevard, H., Natural Product Communications, 2(3), 2007, 305-308.] |
| |
| | {{:anis_vanillin.jpg|}} \\ vanillin (R=OH) \\ anisaldehyde (R=H) | {{:anisylalc_ac.jpg|}} \\ anisyl alcohol (R=H) \\ anisyl acetate (R=Ac) | | | {{:anis_vanillin.jpg|}} \\ vanillin (R=OH) \\ anisaldehyde (R=H) | {{:anisylalc_ac.jpg|}} \\ anisyl alcohol (R=H) \\ anisyl acetate (R=Ac) | |
| ...the aroma of Tahitian vanilla beans was predominantly floral, whereas that of Madagascar vanilla beans was resinous and dried fruit-like." \\ | ...the aroma of Tahitian vanilla beans was predominantly floral, whereas that of Madagascar vanilla beans was resinous and dried fruit-like." \\ |
| [Identification of the Key Odorants in Tahitian Cured Vanilla Beans (Vanilla tahitensis) by GC-MS and an Aroma Extract Dilution Analysis., Takahashi, M., Inai, Y., Miyazawa, N., Kurobayashi, Y., Fujita, A., Bioscience, biotechnology, and biochemistry, 77(3), 2013, 601-605] [[http://www.tandfonline.com/doi/pdf/10.1271/bbb.120840]] | [Identification of the Key Odorants in Tahitian Cured Vanilla Beans (Vanilla tahitensis) by GC-MS and an Aroma Extract Dilution Analysis., Takahashi, M., Inai, Y., Miyazawa, N., Kurobayashi, Y., Fujita, A., Bioscience, biotechnology, and biochemistry, 77(3), 2013, 601-605] [[http://www.tandfonline.com/doi/pdf/10.1271/bbb.120840]] |
| | |
| | {{http://cookislands.bishopmuseum.org/MM/MX1-4/4Q466_Vani-tahi_RR1_GM_MXa.jpg}} \\ |
| | Vanilla tahitensis; McCormack, Gerald (2007) Cook Islands Biodiversity Database, Version 2007.2. \\ |
| | Cook Islands Natural Heritage Trust, Rarotonga. Online at http://cookislands.bishopmuseum.org. |
