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http://dx.doi.org/10.5010/JPB.2005.32.1.031

Induction of Embryogenic Callus and Plant Regeneration by Mature Embryo Culture of Onion (Allium cepa L.)  

Cho Kwang-Soo (Horticulture Research Division, National Institute of Highland Agriculture)
Hur Eun-Joo (Floriculture Research Division, National Horticulture Research Institute)
Hong Su-Young (Horticulture Research Division, National Institute of Highland Agriculture)
Moon Ji-Young (Horticulture Research Division, National Institute of Highland Agriculture)
Publication Information
Journal of Plant Biotechnology / v.32, no.1, 2005 , pp. 31-35 More about this Journal
Abstract
To obtain regeneration system of onion, we analyzed the effects of 2,4-D and BA concentration on the embryogenic callus induction from mature embryos. The highest embryogenic callus induction ratio was shown on MS medium (Murashie and Skoog 1962) containing $2.5\;\cal{mg/L}\;or\;5\;\cal{mg/L}$ picloram after mature embryos were placed on medium. When induced callus were cultured on half strength of MS medium containing $1\;\cal{mg/L}$ Kinetin, the highest shoot formation ratio was observed on MS medium containing $1\;{mg/L}$ 2,4-D and $1\;{mg/L}$ BA. Embryogenic callus were cultured in MS liquid medium containing $1\;\ccal{mg/L}$ of 2,4-D and $1\;\cal{mg/L}$ BA. The suspension cultured cell clumps could be mass propagated. Embryogenic callus were friable, but non-embryogenic callus included a lot of moisture, hence the identification between embryogenic and non-embryogenic callus as easily achieved. When embryogenic callus as cultured on half strength of MS medium containing $1\;\cal{mg/L}$ Kinetin, shoots were induced. The whole plantlet was obtained on rooting medium containing $0.5\;\cal{mg/}$ of NAA.
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