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--- vanilla_tahitensis_j.w._moore [2015/10/02 12:54]
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+++ vanilla_tahitensis_j.w._moore [2017/11/09 14:10]
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 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." \\
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 [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]]
-| {{:anis_vanillin.jpg|}} \\ vanillin (R=OH), anisaldehyde (R=H) | {{:anisylalc_ac.jpg|}} \\ anisyl alcohol (R=H), anisyl acetate (R=Ac) |
+"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.]
-"The key odorants of Tahitian vanilla beans (Vanilla tahitensis) were characterized by a sensory evaluation, aroma extract dilution analysis (AEDA), quantification, and aroma reconstitution. Vanillin and anisaldehyde were identified in the same highest flavor dilution (FD) factor as the most characteristic odor-active compounds in Tahitian vanilla beans, followed by anisyl alcohol and anisyl acetate. Vanillin and anisyl alcohol were by far the most abundant odorants present with the highest concentration in the beans, followed by acetic acid, anisaldehyde, and anisyl acetate. A sensory evaluation of Tahitian vanilla beans and its reconstitute aroma concentrate characterized both samples as similar. These results indicated vanillin, anisaldehyde, anisyl alcohol, and anisyl acetate to be the key odorants in Tahitian vanilla beans. 3-Methylnonane-2,4-dione were identified for the first time in vanilla beans. β-Damascenone and phenylacetic acid were identified for the first time in Tahitian vanilla beans." \\
+| {{:anis_vanillin.jpg|}} \\ vanillin (R=OH) \\ anisaldehyde (R=H) | {{:anisylalc_ac.jpg|}} \\ anisyl alcohol (R=H) \\ anisyl acetate (R=Ac) |{{:guaiacol.jpg| guaiacol}} \\ guaiacol |
+GC-O analysis performed on Vanilla × tahitensis flavor showed 61 odorant zones. Of 38 odor active compounds found, anisaldehyde and guaiacol have been identified as key components of the complex Tahitian vanilla flavor. \\
+[Brunschwig, C., et al. "Odor-active compounds of Tahitian vanilla flavor." Food Research International 46.1 (2012): 148-157]
+"The key odorants of Tahitian vanilla beans (Vanilla tahitensis) were characterized by a sensory evaluation, aroma extract dilution analysis (AEDA), quantification, and aroma reconstitution. Vanillin and anisaldehyde were identified in the same highest flavor dilution (FD) factor as the most characteristic odor-active compounds in Tahitian vanilla beans, followed by anisyl alcohol and anisyl acetate. Vanillin and anisyl alcohol were by far the most abundant odorants present with the highest concentration in the beans, followed by acetic acid, anisaldehyde, and anisyl acetate. A sensory evaluation of Tahitian vanilla beans and its reconstitute aroma concentrate characterized both samples as similar. These results indicated vanillin, anisaldehyde, anisyl alcohol, and anisyl acetate to be the key odorants in Tahitian vanilla beans. 3-Methylnonane-2,4-dione were identified for the first time in vanilla beans. β-Damascenone and phenylacetic acid were identified for the first time in Tahitian vanilla beans... \\
+...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]]
+{{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.

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