四分孢子的显著特征是细胞核和高尔基体呈活跃状态。
The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.
一滴水珠凝结在孢子表面；当接触到孢子另一部分上的水薄层时，水珠便灌注其中，就好像雨滴落在挡风玻璃上汇合在一起。
A single bead of water condenses on a spore's surface; when the bead touches a film of water on another part of the spore, the bead pours into it, like raindrops merging on a windowshield.
在感染艾滋病毒的婴儿中，耶氏肺孢子菌是引起肺炎的最常见原因之一，占感染艾滋病毒的婴儿中所有肺炎死亡病例的至少四分之一。
in infants infected with HIV, Pneumocystis jiroveci is one of the commonest causes of pneumonia, responsible for at least one quarter of all pneumonia deaths in HIV-infected infants.
当小孢子从四分体中释放出来，特殊类型的外壁已经形成。
An extine with its specific pattern had already been formed, when microspores were released from tetrads.
蕨类孢子是从陆地由水流携带搬运而来，百分含量的高低可能是受补偿率的影响。
The fern spore is mostly transported from the land by stream current, and redeeming rate may influence its concentration.
小孢子壁形成时开始在绒毡层内切线壁出现的球状体到花粉粒成熟时仍有一部分附着于花粉粒表面。
The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.
此外，观察了前期I的簇毛麦染色体形态，统计了四分体和小孢子中小麦和簇毛麦染色质微核频率。
Otherwise, the chromosome morphology involving Haynaldia chromatin was observed at preleptotene I, and the frequencies of chromatin nucleus at tetrad stage and at microspore stage were investigated.
单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。
The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.
大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。
Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.
图四、在土壤表面、地表下5、15及30公分土壤深度的瓜类蔓枯病菌柄孢子存活情形。
Fig. 4. Pycnidiospore survival of Didymella bryoniae placed at soil surface, 5, 15, and 30cm below ground at field.
病菌孢子的散发量与降雨量有着十分密切的关系；
病菌孢子的散发量与降雨量有着十分密切的关系；
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