Promotion of Plant Cell Division by an Epidermal Growth Factor

概要

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In some specified treatments, an epidermal growth factor (EGF) promoted adventitious root formation in epicotyl cuttings of Vigna angularis. The number of the roots induced in cuttings treated with 0.1 mg liter^<-1> EGF during the first 24 h and with 2×10^<-4> M IAA during the second 24 h was 15% greater than that of the roots in cuttings treated without EGF and with IAA. Analysis of the optimum timing of EGF application was performed by dividing the first 24 h period into three sequential 8 h periods (0-8 h, 8-16 h and 16-24 h). The most effective time periods in terms of the root formation were 8-16 h and 16-24 h. The 0-8 h period was ineffective with respect to the formation. When carrot suspension cells were cultured for 15 days at a very low cell density (1,000 cells/3 ml Murashige and Skoog's medium) with more than 0.1 mg liter^<-1> EGF, cell numbers were 72% higher than those cultured without EGF. These results suggest that EGF promotes cell division of plants.
日本植物生理学会の論文