ジベレリンがユキノシタ(Saxifraga stolonifera Meerb.)の栄養繁殖と開花に及ぼす影響(栽培管理・作型)  [in Japanese] Effect of Gibberellin Application on Vegetative Propagation and Flowering in Saxifraga stolonifera Meerb(Crop Production & Cropping Type)  [in Japanese]

ジベレリンの処理が,ユキノシタの栄養繁殖と開花に及ぼす影響について検討した.露地栽培では,ジベレリン50mg・L^<-1>の処理によって,対照区に比べ多くの幼植物が分化した.屋内の鉢栽培では,ジベレリン散布区で対照区より多くのランナーが分化し,50および200mg・L^<-1>散布区のランナーには細い腋芽が伸長した.ジベレリン200mg・L^<-1>散布区では,葉色が薄くなり,生育が抑制された.また,抽台と開花はジベレリン50および200mg・L^<-1>散布区で促進され,花穂の伸長は10および50mg・L^<-1>散布区で促進された.ジベレリン50mg・L^<-1>由来株のランナー先端部の挿し芽からの幼植物の分化は,ジベレリン50mg・L^<-1>散布区で対照区より多く得られたが,生育は遅かった.結果より,ユキノシタはジベレリン50mg・L^<-1>処理により,栄養繁殖と開花が促進されることが示された.

Effect of gibberellin application on vegetative propagation and flowering was studied in Saxifraga stolonifera Meerb. Vegetative propagation was promoted by gibberellin spraying under open-field conditions. The number of runners increased by gibberellin sprays and lateral buds were grown by 50-200mg・L^<-1> gibberellin in pot culture under room conditions. The leaf color after spraying with a high concentration of gibberellin was lighter than that with low concentrations or water. Flower stalk development and flowering were promoted by application of 50-200mg・L^<-1> gibberellin sprays. The length of spikes was increased using 10-50mg・L^<-1> gibberellin. In addition, when cuttings from the top of the runners were used after 50mg・L^<-1> gibberellin treatment to the mother plants, differentiation of young plants was promoted by 50mg・L^<-1> gibberellin in comparison with that after spraying water. The growth of young plants induced with gibberellins was, however, slower compared with that of controls. Results indicate that vegetative propagation and flowering are promoted in Saxifraga stolonifera M. by application of 50mg・L^<-1> gibberellin.