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PROBLEM TO BE SOLVED : To establish an effective clone proliferation method for a bulbous crop by taking a tissue of a horticultural crop, especially a bulbous crop as an object for tissue culture and using a rare saccharide as an agent for promoting or controlling the growth of a tissue culture material of the bulbous crop. SOLUTION : The invention provides a method for using a rare saccharide for the promotion or control of the growth of a shoot in the case of using the tissue of a horticultural crop as an explant, and planting and culturing the plant on a medium. The tissue of the horticultural crop is the tissue of a bulbous crop. A thickened bulbous base of the shoot of Gloriosa Lutea is vertically divided into two and used as the explant. The rare saccharide is D-psicose. COPYRIGHT : (C)2008, JPO&INPIT