火棘属果实发育解剖学研究

火棘属植物的托附杯呈深杯状，具有５个分离心皮，子房半不位。托附杯发育成肉质果壁，主要藉细胞体积增大，子房壁全部石细胞化，发育成骨质瘦果状小果的果皮。火棘属的果实不是典型和梨果，是蔷薇科果实在演化过程中的一个过渡类型。火棘属肉质果壁的厚角组织经过角隅减薄后再转变成厚壁组织。

A STUDY ON DEVELOPMENTAL ANATOMY OF THE FRUIT OF PYRACANTHA

This paper deals with fruit development process and its anatomy structure of Pyracantha.The hypanthium is deep cup-shaped. Its gynaecium has five free carpels,with half-inferior ovary.Druing fruit maturity , the hypanthium by the cells enlargement mainly becomes succulent fruitwall,and all cells of ovary wall transform into sclereids,and become pericarp of true fruit that isthe ossified achene-like, Therefore,fruit of Pyracantha is very unlike the true to type pome,but itis only a transitional form in evelutional process of fruit of Rosaceae. The wall thickenings of col-lenchyma in succulent fruit wall of Pyracantha are again removed as. Those cells become changedinto sclerenchyma.