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Trees and Shrubs Archive
Tamarindus indica
Tamarindus indica L.
Family: Leguminosae (Caesalpinoideae).
Description: Medium to large tree reaching 30 m in height and is reputed to remain productive for 150-200 years. The dome-shaped crown is porus and the tree makes a good windbreak. The clusters of pale yellow flowers turn into curved, rust colored pods. Fruiting usually commences at ~ 10 years although early fruiting can be obtained via grafting. It has not been observed to nodulate but it does have associations with vesicular arbuscular mycorrhizal (VAM) fungi.

Distribution: The tree is native to the dry, African savannas but can also be found in the lowland, humid tropics where there is a dry season of 4-5 months. The trees need a strong dry season to bear fruit.

Environmental Requirements:

Altitude: Sea level to 1000 m
Rainfall: 800 - 2500 mm
Soils: It toleartes a wide range of soils (Entisols, Alfisols, Oxisols)
Ecozone: Semi-arid to humid

Establishment: Seedlings. The seed does not require any special treatment but is slow to germinate (15-45 days). The seedlings are readily browsed so need to be protected for the first few years.
Pests & Diseases: Pods are attacked by the Tamarind pod weevil and seeds are attacked by a bruchid beetle [Caryedon serratus (Olivier)] . Leaf spot blight caused by Phomopsis tamarindii fungus.

Uses: The pods contain an "sweet and sour" pulp (~30%) that is an important ingredient of sauces and juices throughout the world. The pulp is a rich source of tartaric acid (8-18%). The in vitro digestibility of kernel protein is around 70% and it is rich in lysine, glutamic acid, aspartic acid, glycine and leucine but deficient in sulphur-containing amino acids. Tamarind seed extracts have recently been reported to have a strong antimicrobial action against E.coli. The strong bacterial and fungicide action is probably due to tamarindineal (5-hydroxy-2-oxo-hexa-3,5-dienal) [Imbambi et al., 1992).

The seeds yield an adhesive or binding agent used in paper and textile sizing and weaving. Tamarind xyloglucan, the major component of tamarind kernel powder, forms stiff gels and is used for thickening, stabilizing and gelling in foods. India is the major exporter of tamarind pulp to Europe and the US. Each mature tree produces between 100-300 kg of pulp. There is large variability in the production due to site quality, tree provenance, and climate.

References:

(1) El-Siddig, K., Ebert, G. and Ludders, P. 1999. Tamarind (Tamarindus indica L.): a review on a multipurpose tree with promising future in the Sudan. Angewandte Botanik. 73 (5/6). 202-205.

(2) Gurumurthy, S.B., Sreenivasa, M.N. 2000. Occurrence and distribution of VAM fungi in the rhizosphere of five tree species grown under agroforestry system. Environment and Ecology. 18 (2). 500-502.

(3) Imbabi, E.S., Ibrahim, K.E., Ahmed, B.M., Abulfutuh, I.M. and Hulbert, P. 1992. Chemical characterization of tamarind bitter principle, tamarindineal [tamarindienal]. Fitoterapia. 63 (6). 537-538.

(4) Rao, Y.S., Mathew, K.M., Potty, S.N. 1999. Tamarind (Tamarindus indica L.) research - a review. Indian Journal of Arecanut, Spices and Medicinal Plants. 1 (4). 127-145.

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