雄孢子

The investigation of the structures of reproductive organs,megasporogenesis,microsporogenesis and the development of male and female gametophyte in Dendrocalamus sinicus are made using normal paraffin method in this article.

通过石蜡切片的方法对巨龙竹生殖器官结构、大小孢子的发生和雌、雄配子体的发育过程进行了观察研究。巨龙竹为一心皮组成的单室单子房，子房内具有一个胚珠，倒生、双珠被、厚珠心。

The inheritance of poly-eggs was investigated by crossing and reciprocally crossing APIV with monoembryonic rice variety IR36,Minghui No.77 and Longtepu B,respectively.It was suggested that the production of poly-eggs is probably controlled by gametophytic genotypes,rather than sporophytic ones.

通过多胚水稻品系APⅣ与单胚水稻品种IR36、明恢77和龙特浦B正反杂交，研究APⅣ的多卵遗传行为，表明APⅣ的多卵性状可能不是由孢子体基因型决定的，而是由雄配子体基因型决定，属配子体遗传的范畴。

Leaves glossy deep green adaxially, narrowly linear-lanceolate, straight or slightly falcate, 0.8-6.5(-7) cm × 1.5-5 mm, midvein green abaxially, 0.3-1.2 mm wide, flat with median longitudinal keel throughout, stomatal bands present on both surfaces, bands on adaxial surface 0.5-1.5 mm wide, of 7-28 rows of stomatal, white powdery or not, bands on abaxial surface 1.2-2.8 mm apart, 0.3-0.8(-1) mm from leaf margin, not or rarely white powdery, base decurrent, margin denticulate, sometimes indistinctly so, especially on old trees, with 18-55(-90) teeth per side, apex usually symmetric and spinescent, spine 0.3-2 mm. Pollen cone fascicles terminal, 1-3(-5) together, broadly obovoid, each of 8-20 cones, occasionally a few also around base of seed cone; peduncle 2-4 mm; cones narrowly oblong-conical.

正面的叶有光泽的深绿色，披针形狭线形，直的或稍镰刀形， 0.8-6.5(-7)厘米×1.5-5毫米，中脉绿色背面，全部的0.3-1.2毫米宽，平的具中间的纵向的脊，气孔带宿存在两面，在正面0.5-1.5毫米宽上条纹状，7-28排stomatal的，与否白色粉状，相隔1.2-2.8毫米的条纹状的在背面，从叶缘的0.3-0.8(-1)毫米，白色敷粉的或很少的不，基部下延，边缘具小齿，有时不清楚如此，特别是在古树上，具18-55(-90)齿每边，先端通常对称和具刺，刺0.3个-2毫米雄球花束簇终端，花序梗2-4毫米；圆锥形孢子叶球狭长圆形。

The temperature affects the sustained time of secondary sporogenous cell split, the sustained time of microspore mother cell, formation speed and regular of male gametophyte.

温度影响次生造孢细胞持续分裂的时间、小孢子母细胞的持续时间及雄配子体的形成速度和整齐度。

The results showed: four devices flower pollen sacs, anther wall conforms to the basic, from epidermis, the indoor wall, middle (2-3 layers) and tapetal composition tapetum to glandular type.

对悬铃木小孢子发生及雄配子体发育过程进行了观察，结果表明：花药具4个花粉囊，花药壁发育为基本型，由表皮、药室内壁、中层（2-3层）和绒毡层组成，绒毡层为腺质型。

Furthermore, HBsAg gene expression was obtained in zygotic sporophytes by using male gametophytes-targeted bombardment.

继而利用雄配子体途径也实现了HBsAg在海带二倍体孢子体中的稳定表达，提示利用海带表达口服乙肝疫苗具有一定可行性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐