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|Elephant foot yam|
(Dennst.) Nicolson, 1977
Amorphophallus campanulatus (Roxb.) Blume ex Decne
Amorphophallus paeoniifolius, the elephant foot yam or whitespot giant arum or stink lily, is a tropical tuber crop grown primarily in Africa, South Asia, Southeast Asia and the tropical Pacific islands. Because of its production potential and popularity as a vegetable in various cuisines, it can be raised as a cash crop.
The plant gives off a putrid smell. The pistillate (female) and staminate (male) flowers are on the same plant and are crowded in cylindrical masses. The berries are red when ripe and are not quite round, being subglobose or oviod.
Elephant foot yam is of Southeast Asian origin. It grows in its wild form in Sri Lanka, the Philippines, Malaysia, Indonesia, and other Southeast Asian countries.
In India this species as a crop is grown mostly in Bihar, West Bengal, Kerala, Karnataka, Andhra Pradesh, Maharashtra and Orissa. In India it is popularly known as "oal" (ol (ওল) in Bengali, suran or jimikand in Hindi, senai kizhangu in Tamil, suvarna gedde in Kannada, chena (ചേന) in Malayalam, oluo in Oriya,pulla ganda in Telugu and kaene in Tulu).
In Bihar it is used in oal curry, oal bharta or chokha, pickles and chutney. Oal chutney is also called "barabar chutney" as it has mango, ginger and oal in equal quantities, hence the name barabar (meaning "in equal amount").
In Tonga, where it is known as teve, it is viewed as the most inferior of all yam species, and is only eaten if nothing else is available.
The elephant-foot yam is widely used in Indian medicine and is recommended as a remedy in all three of the major Indian medcinal systems: Ayurveda, Siddha and Unani. The corm is prescribed for bronchitis, asthma, abdominal pain, emesis, dysentery, enlargement of spleen, piles, elephantiasis, diseases due to vitiated blood, and rheumatic swellings. Pharmacological studies have shown a variety of effects, specifically antiprotease activity, analgesic activity, and cytotoxic activity. In addition it has been found to be a potentiator for further reducing bateria activity when used with antibiotics.
Along with other therapeutic applications, the Ayurvedic Pharmacopoeia of India indicates the use of corm in prostatic hyperplasia. The corm contains an active diastatic enzyme amylase, betulinic acid, tricontane, lupeol, stigmasterol, betasitosterol and its palmitate and glucose, galactose, rhamnose and xylose.
Notes and references
- Nicolson, Dan Henry (1977). "Nomina conservanda proposita - Amorphophallus (Proposal to change the typification of 723 Amorphophallus, nom. cons. (Araceae))". Taxon 26: 337–338.
- Quattrocchi, Umberto (2012). CRC World Dictionary of Medicinal and Poisonous Plants: Common names, scientific names, eponyms, synonyms, and etymology, Volume 1 A–B. Boca Raton, Florida: CRC Press (Taylor & Francis). p. 253. ISBN 978-1-4398-9442-2.
- "Amorphophallus paeoniifolius". Integrated Taxonomic Information System. Retrieved 6 December 2014.
- "Amorphophallus paeoniifolius (Dennst.) Nicolson - whitespot giant arum". Natural Resources Conservation Service, United States Department of Agriculture.
- Nedunchezhiyan, M. and Misra, R. S. (2008). "Amorphophallus tubers invaded by Cynodon dactylon". Aroideana (International Aroid Society) 31 (1): 129–133.
- Khare, C. P. (2007). Indian Medicinal Plants: An Illustrated Dictionary. Berlin: Springer Verlag. ISBN 978-0-387-70637-5.
- Wu, Xueqing and Zhu, Weifeng (1999). "Summary of Pharmacological Studies of Amorphophallus Riviers". LiShiZhen Medicine and Materia Medica Research 10 (8): 631–632. (subscription required (. ))
- Das, S. S., et al. (2009). "Effects of petroleum ether extract of Amorphophallus paeoniifolius tuber on central nervous system in mice". Indian journal of pharmaceutical sciences 71 (6): 651–655. doi:10.4103/0250-474X.59547. PMID 2846470.
- Dey, Yadu Nandan, et al. (2011). "Synergistic depressant activity of Amorphophallus paeoniifolius in Swiss albino mice". Journal of Pharmacology and Pharmacotherapeutics 2 (2): 121–123. doi:10.4103/0976-500X.81910. PMID 3127343.
- The corm is irritant due to the presence of needle-like crystals of calcium oxalate. Ravi, V.; Ravindran, C. S. and Suja, S. (2009). "Growth and productivity of elephant foot yam (Amorphophallus paeoniifolius)(Dennst. Nicolson): An overview". Journal of Root Crops (Trivandrum, India) 35 (2): 131–142. Boiling the corms dissolves the crystals and makes the corms edible. Owusu-Darko, Patricia G., Paterson, Alistair and Omenyo, Emmanuel L. (2014). "Cocoyam (corms and cormels) — An underexploited food and feed resource". Journal of Agricultural Chemistry and Environment 3 (1): 22–29. doi:10.4236/jacen.2014.31004.
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