| 摘要 |
PROBLEM TO BE SOLVED: To provide an agent for controlling growth or differentiation of plants and to provide a technique for searching a chemical substance having useful biological activity clarifying a target, namely a method, etc., for screening the chemical substance with activity to a specific target in order to chemically control the target part. SOLUTION: The method for searching for a chemical substance promoting the growth of a root of a plant comprises measuring the level of intracellular signaling from a cytokinin receptor in a system where a cell having the cytokinin receptor derived from a plant is brought into contact with a chemical substance having an agonistic activity on the receptor and a substance to be tested, comparing the level of intracellular signaling measured in the preceding step with a level of intracellular signaling measured in the absence of the chemical substance and determining the chemical substance as being a chemical substance promoting the growth of a root of a plant based on the difference obtained by the comparison. 6-Chloro-2-ethoxycarbonylmethylamino-4-phenylquinazoline, etc., was found as the active substance by the method. COPYRIGHT: (C)2008,JPO&INPIT
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