【摘要】 用摘叶法判定大花栀子的花芽生理分化期分为成花诱导期和花芽孕育期.跟踪测定了大花栀子花芽生理分化期内源激素和碳氮比的动态变化,结果表明,成花诱导期ZR(玉米素核苷)/GA(赤霉素)出现高峰值;花芽孕育期ZR/GA急剧下降,碳氮比急剧升高,在花芽孕育期未出现一个高峰值.成花诱导期和花芽孕育期由不同的机理调控,内源激素平衡对成花诱导起调控作用,在花芽孕育过程中碳氮比起主要的作用.更多还原

【Abstract】 Thirty year old cape jasmine trees ( Gardenia jasminoides var.grandiflora) in mountain Jin Yun of Chongqing were used as materials to study on the period of physiological flower bud differentiation.The results show that the physiological flower bud differentiation has been divided into two periods,one is floral induction,and the other is floral initiation.The contents of carbohydrate,nitrogen and endogenous hormones in leaves were investigated during period of physiological flower bud differentiation.The results have shown that in the period of floral induction,the ratio of ZR/GA has significantly increased,but the ratio of carbohydrate and nitrogen contents has increased a little.In the period of floral initiation,the ratio of ZR/GA has significantly decreased,but the ratio of carbohydrate and nitrogen contents has significantly increased.The ratio of ZR/GA is negatively correlated with the period of floral induction and the ratio of carbohydrate and nitrogen contents is correlated with the period of floral initiation.In the authors opinion,the increasing of ZR/GA ratio has resulted in the increasing of carbohydrate and nitrogen contents ratio.更多还原