甜樱桃花芽分化的解剖学观察

AN ANATOMY OBSERVATION ON FLORAL BUD DIFFERENTI ATION OF CERASU S AV IU M (L.)MOENCH

甜樱桃品种大紫6月15日以前花芽尚未分化。未分化的芽,其生长锥呈锥状突起,原套和原体细胞尚未发生变化。到6月20日前后,多数花芽开始了花原基及苞片原基的分化。7月20日前后,花原基伸长,萼片原基分化.7月30日前后,花冠原基分化。8月20日前后,雄蕊原基分化。8月30日前后,心皮原基分化,并向上突起。苞片、花萼、花冠、雄蕊和心皮等原基均由表皮下的原套细胞分化而来。到9月10日左右,雌蕊形成。

Before June 15, the floral bud differentiation of sweet cherry variety Dazi has not yet started. In this period, the cone of growth is a tapered projection and its cells of tunica as well as corpus have not changed. The primordium differentiation of flower and bract begin around June 20.About July 20, the flower primordium elongates and the differentiation of sepal primordium begins, while the primordium differentiation of corolla and stamen start round about July 30 or Aug.20 priority.The carpel primordium differentiates and projects upward about Aug.30.All primordium of bract calyx porolla, stamen and carpel differentiate from tunica cells below epidermis,The pistil forms round about Sept. 10.