黄金树大、小孢子发生及雌、雄配子体发育的细胞学观察

采用石蜡切片法对黄金树大、小孢子发生及雌、雄配子体发育的过程进行了详细的细胞学观察。结果表明：黄金树子房两室，中轴胎座，胚珠多数，倒生。单珠被，薄珠心，孢原细胞直接发育成大孢子母细胞。单孢原蓼型胚囊。黄金树雄蕊五枚，三枚退化，二枚可育。花药二室，腺质绒毡层，小孢子四分体排列方式为正四面体型，成熟花粉粒为四合花粉。

Observation on Megasporogenesis, Microsporogenesis and Development of Female and Male Gametophytes of Catalpa speciosa Warder

The processes of megasporogenesis, microsporogenesis and the development of female and male gametophytes of Catalpa speciosa Warder were observed by serial paraffin sections. The results are as follows: the ovule has 2 locules and is anatropous, single-integument, and thin-nucellus. Sporogonium developed megaspore mother cell directly. The development of embryo sac is of polygonum type. There are five stamens in C.speciosa Warder, including three degradation and two fertile stamens. Its anthers have 2 mirosporangiates, and the tapetum belongs to glandular type. The tetrads are tetrahedral. The pollen grains are four celled at shedding.