Date Last Edited: 08/24/2001
Hawaii Cooperative Extension Service
Taro has the possibility of becoming an ingredient in hypoallergenic foods. It could be an allergen-free substitute for rice and wheat in staples such as bread, noodles, spaghetti, macaroni, gruel, taro rice, crackers, and dumplings. It is advantageous fo r infants with food allergies.
The internal color of the raw taro corm ranges from white, yellow and pink to a combination of colors. Upon heating, the color may be creamy white, grayish purple, bright yellow or a combination of colors depending on the cultivar. White-fleshed taro woul d not need any extra processing or bleaching to turn it into a product that mimics foods used worldwide--this would be a cost saving as well as a reduction of the chance of contamination during processing (Hollyer, 1991; Hollyer and Sato, 1990). Meristem culture can be important in propagating white taro and in the shipment of disease-free plant material.
Table 1. Mean number of shoots per explant of white taro (Colocasia esculenta var. esculenta cv. Pikokea, Pololu, Nihopuu and Haokea) cultured on Murashige and Skoog media with varying levels of IAA and BA.
Number of ÁM IAA/ Number shoots per Cultivar ÁM BA of explants explants 'Pikokea' 0/0 1 1.0 5/5 9 9.3 5/lO 6 12.0 10/5 17 13.7 10/10 6 7.3 'Pololu' 0/0 6 5.5 5/5 1 6.0 5/10 4 4.5 10/5 6 7.8 10/10 1 3.0 'Nihopuu' 0/0 9 2.1 5/5 6 4.0 5/10 9 5.2 10/5 11 15.5 10/10 6 3.7 'Haokea' 0/0 2 1.0 5/5 9 4.4 5/10 8 2.5 10/5 8 7.8 10/10 8 4.1
Table 2. Overall mean number of shoots per explant of white taro (Colocasia esculenta var. esculenta cv. Pikokea, Pololu, Nihopuu and Haokea) per IAA and BA treatment.
Number of Number shoots per ÁM IAA/ÁM BA of explants explants 0/0 l8 3.1 5/5 25 6.2 5/10 27 5.8 10/5 42 12.2 10/10 21 4.9
Excised meristems were then placed, one ex-plant per test tube, on modified Murashige and Skoog (MS) media (Murashige and Skoog, 1962). Our basic modified MS medium omits glycine and kinetin. Also, 1 mg/liter thiamine, 1 mg/liter nicotinic acid, and 8.5 g/liter agar are different levels from MS medium. IAA levels were varied. Test tubes contained modified MS medium with growth regulators indole-3-acetic acid (IAA) and 6-benzyladenine (BA) in respective combinations of 5/5, 5/10, 10/5 and 10/10 µM. A treatment of no growth regulators was also included.
Hollyer, J. R. (ed.). 1991. Proceedings of: White taro; another opportunity: allergen-free products from Hawaii, University of Hawaii, Honolulu, Hawaii, 24 October 1990.
Hollyer, J. R. and D. M. Sato (eds.). 1990. Proceedings of: Taking taro into the 1990s: a taro conference, University of Hawaii, Hilo, Hawaii, 17 August 1989.
Martin, S. P., C. A. Bobisud, and T. T. Sekioka. 1993. Micropropagation of white taro (Colocasia esculenta var. esculenta cv. Pikokea, Pololu, Nihopuu, and Haukea). HortScience 28:543. (Abstr.)
Murashige, T. and F. Skoog. 1962. A revised medium for rapid growth and bioassays tobacco tissue cultures. Physiol. Plant. 15:473-497.
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