原孢子

The prepared protoplasts could regenerate mycelium and produce conidium with similar pathogenecity to that of parental strains.

所制备的原生质体均能再生菌丝和具有产生与原菌株相同致病性分生孢子的能力。

The other cells of the tetrad undergo degeneration. The mature embryo sac consists of an egg apparatus, a central cell, and 3 antipodal cells. The embryo sac is a monosporic Polygonum type. The zygote develops into a mature embryo going through proembryo, globular, heart, and torpedo stages.

胚囊发育类型为单孢子蓼型胚囊； 2胚的发育经过原胚、球形胚、心形胚和鱼雷胚等阶段发育为成熟胚；胚柄在球形胚时期最发达，但胚柄短小，只由3个扁平细胞组成，之后逐渐退化。

The pattern of spore germination is of the Vittaria-type and the gametophyte development of the Drynaria-type.

孢子萌发类型为书带蕨型，原叶体发育为槲蕨型。

The spores of Neocheiropteris palmatopedate were cultured in improved Knop's medium, in-situ humus soil and red soil respectively. Spore germination and gametophyte development were observed under optical microscope and dissecting microscope, and the impact of four culture methods on the gametophyte development and sexual reproduction was compared. On these experiments, its cause of endangerment was analyzed.

采用改良Knop's固体培养基、原生境腐殖质土和红壤分别培养扇蕨孢子，光学显微镜及解剖镜下观察记录其于包子萌发及配子体发育过程，比较了3种培养方法对其配子体发育和有性繁殖的影响，并在此基础上探讨了扇蕨的濒危原因。

The development of anther and ovule followed the finish of the flower organ initiation. Pollen mother cells and well developed microsporagium wall occurred when the diameter of the bud reached about 3.0 mm, and the archesporial cell which played the role of megaspore mother cell formed in ovule when the diameter of the bud reached about 3.5 mm.

花药及胚珠的发育与花器官的形态发生之间有明显的连续性，当花蕾直径为3.0 mm左右时花粉母细胞及完整的花粉囊壁形成，直径达到3.5 mm左右时胚珠中出现孢原细胞的分化，它直接起大孢子母细胞的功能。

The archesporial cell lies under the nucellus epidermis, which develops into a functional megasporocyte.

孢原细胞位于珠心表皮之下，直接起大孢子母细胞的功能。

To find out the substitute parameters for pathogenic microorganism warning aiming at potential pathogenic microorganism pollution accidents happened in water environment,the relationships between turbidity ,particle counts and concentration,removal,recovery rate of Giardia cyst and Cryptosporidium oocyst in raw and filtered water are presented.

针对潜在的病原微生物突发性水污染事故，为寻找病原微生物预警替代性指标，重点探讨浑浊度、颗粒计数与原水、过滤水中贾第鞭毛虫孢囊和隐孢子虫卵囊浓度、回收率、去除的关系，认为浑浊度与颗粒计数可以作为水厂处理效果与饮用水受两虫污染的指示指标，并结合水厂的实际情况提出相应的控制方法和建议，指出暴雨时应特别注意两虫的爆发

All chickens were orally challenged with homologous sporulated oocysts at 26 days of age and killed at eight days post challenge. Weight gains, anticoccidial index and oocyst output were determined and compared with those of the control animals.

以可溶性的GST-gam56-2融合蛋白为免疫原，设立高、中、低(1.0 mg、0.5 mg、0.25 mg) 3个剂量，单独或使用弗氏完全佐剂，于5 d、12 d和19 d对雏鸡进行3次免疫， 26 d用5×104个E.maxima孢子化卵囊进行攻虫，8 d后迫杀，对各组的存活率、相对增重率、卵囊减少率、ACI等指标进行统计分析。

The effects of different concentrations of arsenic on spore germination and rhizoid and prothallium growth of Pteris vittata under aseptic condition were studied.

研究无菌条件下不同浓度砷对蜈蚣草的孢子萌发、假根和原叶体生长发育的影响。

In homosporous plants, there is only one type of prothallus with both male and female sex organs.

在具同形孢子的植物中，只有一种雌雄性器官兼备的原叶体类型。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。