倒生胚珠

‘大五星’枇杷的胚胎发育解剖观察表明：（1）‘大五星’枇杷胚珠为倒生胚珠，蓼型胚囊和核型胚乳。

Embryo development of ' Dawuxing ' Results of anatomical structure of ' Dawuxing ' showed that ( 1 ) The ovules belongs to anatropous ovule , polygonum type embryo-sac , nuclear endosperm in ' Dawuxing ' .

成熟花粉为2-细胞型。（2）牛膝菊子房一室，每室一枚倒生胚珠，具单珠被，薄珠心。

The mature pollen grain is 2-celled . ( 2 ) The ovary has 1 locule and there is 1 anatropous ovule in each locule .

子房2室，每室2个倒生胚珠，具单珠被，薄珠心。

The ovary is 2-loculus with 2 anatropous ovules in each . The ovule is unitegmic and tenuinucellate .

雌蕊3心皮3室，子房下位，中轴胎座，每室2倒生胚珠，厚珠心，双珠被，内珠被独自形成珠孔。

Its pistil consists of three carpels , the inferior ovary has three locules and each locule has two ovules which are anatropous on axile placenta . The ovule is bitegminous and crassinucellate .

2月底，苞片体积不再发生变化，珠鳞膨大端的基部的近轴面分化出2个倒生胚珠。

At the end of February , the bract attained approximately their full size , and a pair of anatropous ovules were initiated on the adaxial surface at the base of the fertile ovuliferous scale .

雌配子体发育的特点是：倒生胚珠、基底胎座、厚珠心、双珠被、孢原细胞直接长大成大孢子母细胞、反足细胞退化早，胚珠发育为蓼型。

The character of macrospore in development were as followed : anatropal ovule , basal placenta , thick nucellar , two integument , megaspore mother cell coming directly from archesporial cell , early degenerating antipodal cell , thedevelopment of the embryo sac being conformed as the polygonum type .

子房为二心皮一室，多胚珠，侧膜胎座，倒生型胚珠。

The ovary was bicarpellary syncarpous and unilocular having parietal placentas . Ovules were anatropous .