Pangium – Wikipedia

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Genus of trees

Pangium is a genus containing the sole species Pangium edule, a tall tree native to the mangrove swamps of Southeast Asia (Indonesia and Papua New Guinea[3]). It produces a large poisonous fruit (the “football fruit” or pangi)[4] which can be made edible by fermentation. It is dioecious, with male and female flowers produced on separate individuals.[5]

The taxonomy of the tree is uncertain and it may also be classed in the Flacourtiaceae[3] or the Violales.

Description[edit]

The tree can reach 18 metres (59 feet) in height. The leaves are heart-shaped. The brownish fruit grows in clusters and shaped like a pear.[4]

Cultivation[edit]

The tree requires many years to mature and the seeds are therefore most frequently harvested from wild trees, as it is not economically feasible to cultivate.[6] Although poisonous to humans, the seeds of the tree form part of the natural diet of the babirusa (Babyroussa babyrussa).[7]

The fresh fruit and seeds contain hydrogen cyanide and are deadly poisonous if consumed without prior preparation.[8][9][10] The seeds are first boiled and then buried in ash, banana leaves and earth for forty days,[11] during which time, they turn from a creamy white colour to dark brown or black.[12] The method relies on the fact that the hydrogen cyanide released by the boiling and fermentation is water-soluble and easily washed out.

The kernels may be ground up to form a thick black gravy called rawon, popular dishes include nasi rawon, beef stew in keluwek paste, popular in East and Central Java,[13] and sambal rawon, rawon stew made with beef or chicken also exists in East Java.[14] In West Java and Jakarta, gabus pucung or snakehead fish in pucung paste soup is a popular traditional dish in Betawi cuisine.[15] The Toraja dish pammarrasan (black spice with fish or meat, also sometimes with vegetables) uses the black keluak powder.[citation needed] In Singapore and Malaysia, the seeds are best known as an essential ingredient in ayam (chicken) or babi (pork) buah keluak,[16][17] a mainstay of Peranakan cuisine. Dusun tribe from Borneo use this pounded kernel as main ingredient for making local signature dish called bosou,[18] sour taste fermented fish.

People of Minahasa tribe in North Sulawesi use young leaves as vegetable. The leaves will be sliced into small part then it is cooked by mixing with herbs and pork fat or meat inside bamboo. Many sellers in Tomohon traditional market sell the leaves whether sliced or not.

Nutrition[edit]

The edible portions of the plant are an excellent source of vitamin C and high in iron.

References[edit]

  1. ^ IUCN SSC Global Tree Specialist Group & Botanic Gardens Conservation International (BGCI) (2021). “Pangium edule“. IUCN Red List of Threatened Species. 2021: e.T143874361A192377449. Retrieved 25 June 2022.
  2. ^ “Sylloge Plantarum Novarum Itemque Minus Cognitarum a Praestantissimis Botanicis adhuc Viventibus Collecta et a Societate Regia Botanica Ratisbonensi Edita. Ratisbonae (Regensburg)”. 2. 1825: 13.
  3. ^ a b Conn B, Damas K. “Pangium edule Reinw.“. National Herbarium of New South Wales, and Papua New Guinea National Herbarium. Retrieved 15 October 2009.
  4. ^ a b The Complete Guide to Edible Wild Plants. United States Department of the Army. New York: Skyhorse Publishing. 2009. p. 134. ISBN 978-1-60239-692-0. OCLC 277203364.{{cite book}}: CS1 maint: others (link)
  5. ^ Renner, Susanne S. (2014). “The relative and absolute frequencies of angiosperm sexual systems: Dioecy, monoecy, gynodioecy, and an updated online database”. American Journal of Botany. 101 (10): 1588–1596. doi:10.3732/ajb.1400196. PMID 25326608.
  6. ^ Andarwulan N, Fardiaz D, Wattimena GA, Shetty K (1999). “Antioxidant activity associated with lipid and phenolic mobilization during seed germination of Pangium edule Reinw”. Journal of Agricultural and Food Chemistry. 47 (8): 3158–3163. doi:10.1021/jf981287a. PMID 10552624.
  7. ^ Leus K, Morgan CA, Dierenfeld ES (2001). “Nutrition”. In Fischer M (ed.). Babirusa (Babyrousa babyrussa) Husbandry Manual. American Association of Zoos and Aquariums.
  8. ^ Treub M (1896). “Sur la localisation, le transport, et le rôle de l’acide cyanhydrique dans le Pangium edule“. Ann Jardin Bot Buitenzorg (in French). xiii: 1.
  9. ^ Greshoff M (1906). Distribution of prussic acid in the vegetable kingdom. Report Brit Assn. York, England. p. 138.
  10. ^ Willaman JJ (1917). “The estimation of hydrocyanic acid and the probable form in which it occurs in Sorghum vulgare“. J Biol Chem. 29 (1): 25–36. doi:10.1016/S0021-9258(18)86804-1.
  11. ^ Chia CC. “Buah Keluak”. Archived from the original on 30 June 2012. Retrieved 15 October 2009.
  12. ^ Wong WH (11 January 2007). “Buah Keluak”. National Parks.
  13. ^ Nyonya Rumah (24 July 2012). “Nasi Rawon Komplet” (in Indonesian). kompas.com. Retrieved 24 July 2013.
  14. ^ “Tarry, Tarry Night”. 22 May 2007. Retrieved 15 October 2009.
  15. ^ Media, Kompas Cyber (23 June 2019). “Jakarta Ulang Tahun, Yuk Coba 5 Kuliner Betawi Langka Ini Halaman all”. KOMPAS.com (in Indonesian). Retrieved 1 July 2020.
  16. ^ Ng L (29 October 2007). “Ayam/Pork Buah Keluak”.
  17. ^ Chia CC. “Ayam/Babi Buah Keluak”. Archived from the original on 30 June 2012. Retrieved 15 October 2009.
  18. ^ Lajius, Leolerry (April 2014). “Bosou – Makanan tradisi masyarakat Dusun Sabah” (PDF). Universiti Malaysia Sabah. Retrieved 23 February 2018.