Vanilla tahitensis

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Vanilla tahitensis
Vanilla tahitensis.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Vanilloideae
Genus: Vanilla
Species:
V. tahitensis
Binomial name
Vanilla tahitensis
(Moore, 1933) [1]

Vanilla tahitensis is a species of orchid in the genus Vanilla . It was first described by the botanist John William Moore in 1933 from Raiatea in the Society Islands, where it was found growing on trees, having escaped from cultivation. [1]

Contents

History

Vanilla tahitensis is a polyploid species and has been shown to be a cross between Vanilla planifolia and Vanilla odorata . This hybridisation may have happened naturally or inadvertently in the period 1350-1500 in tropical America. It was used by the Aztecs and the flavour proved popular with the Spaniards. Hernán Cortés brought vanilla pods to Europe where they were grown in greenhouses, and cultivation was attempted in various tropical locations. Seeds from Madagascar were taken to Tahiti in 1848 by the French Admiral Ferdinand-Alphonse Hamelin, and it was this foundation stock that is now cultivated as Vanilla tahitensis in French Polynesia. [2] In Mexico, it is pollinated by a specific species of bee, so when grown elsewhere, the flowers need to be pollinated by hand in order for the pods to develop. [3]

Description

Vanilla tahitensis in cultivation Vanilla no Tahiti.jpg
Vanilla tahitensis in cultivation

Vanilla tahitensis is a vine that grows on trees for support. It has zig-zag stems, narrow elliptic leaves and yellowish-green flowers, which are followed by bunches of bean-like pods. As compared to the more widely grown Vanilla planifolia, the pods are shorter and broader, and its taste and fragrance are also distinctive. [2]

Cultivation

Vanilla tahitensis bean (down) Vanilles Bourbon et Tahiti.jpg
Vanilla tahitensis bean (down)

The seed is planted at the foot of a small tree and the vine scrambles up the trunk. When it gets too tall to be easily reached, it is detached from the trunk and wound round it, the trunk becoming surrounded by multiple layers of vine. The plant starts flowering when three years old, and as the flowers only last for a day, hand-pollinating them needs to be done in a timely manner. The pods develop over a period of about nine months, and when they turn reddish-brown, they are picked by hand. They are then sun-dried by day and placed in sweatboxes by night. The curing and fermentation process lasts for about three months, during which time the pods lose much of their moisture and become supple and oily. [2]

Chemistry

The pods are relatively flavourless when first picked and the typical flavours and aromas arise during the curing process. The main active ingredients are vanillin, 4-hydroxybenzoic acid, 4-hydroxybenzaldehyde and vanillic acid. [4]

See also

Related Research Articles

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Vanilla planifolia is a species of vanilla orchid. It is native to Mexico, Guatemala and Belize. It is one of the primary sources for vanilla flavouring, due to its high vanillin content. Common names include flat-leaved vanilla, and West Indian vanilla. Often, it is simply referred to as "the vanilla". It was first scientifically named in 1808. With the species' population in decline and its habitats being converted to other purposes, the IUCN has assessed Vanilla planifolia as Endangered.

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<i>Chrysophyllum oliviforme</i> Species of flowering plant

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Vanilla production in French Polynesia Crop production in French Polynesia

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References

  1. 1 2 "Vanillia tahitensis J W Moore". Tropicos. Retrieved 2015-05-21.
  2. 1 2 3 Conese, Jackie (2011). "The Vanilla of French Polynesia". Sea Education Association. Retrieved 2015-05-21.
  3. Odoux, Eric; Grisoni, Michel (2011). Vanilla. CRC Press. pp. 423–. ISBN   978-1-4398-5780-9.
  4. Ranadive, Arvind S. (1992). "Vanillin and related flavor compounds in vanilla extracts made from beans of various global origins". Journal of Agricultural and Food Chemistry. 40 (10): 1922–1924. doi:10.1021/jf00022a039.