孢子细胞

Although the megagametophyte formed and even the double fertilization had been finished 70 days after pollination at normal temperature, the megasporogenesis had not yet been finished at low temperature.

低温(12-18℃)处理的蝴蝶兰，授粉50d开始分化胚珠原基、60 d胚囊处于大孢子母细胞时期，比常温(20-25℃)下的推迟10-15 d；授粉70 d，常温下的蝴蝶兰植株已完成雌配子体发育和双受精，而低温处理的蝴蝶兰仍未完成大孢子的发生过程。

Now the research has made progress.(1) The meiosis stages of megaspore could be discriminated timely through observing the meiosis of microspore under the same environmental conditions, according to the association of female and male buds during development.

1首次提出利用雌、雄花芽发育进程的时序性相关性，以相同生境以及培养条件下的小孢子发育进程为参照，从而相对准确地实现白杨大孢子母细胞减数分裂进程即时判别的技术方法。

Under the same environmental conditions when the meiosis of microspore mother cell develop into tetrads the female buds were dipped duly with colchicine solution, which guaranteed that chromosome doubling of megaspore in white poplar could be accomplished in a short time. So much workload was cut down, and induction efficiency of triploid white poplars was also improved.

当相同生境以及培养条件下的小孢子母细胞减数分裂达到四分体后，适时采用秋水碱溶液对雌花芽进行浸泡处理，可保证白杨大孢子染色体加倍处理能集中于一个较短的时间段内进行，从而大大减轻了工作量，同时提高三倍体诱导效率和效果。

Streptomyces 702 can obviously result in condensing of the plasma in the mycelium cell and strongly inhibit sclerotium and spore germination,a complete inhibition takes place when the dosage is at the level of 15.11 mg/L and 10.64 mg/L.

能显著的引起菌丝细胞内原生质凝集；对菌核及孢子的萌发有较强的抑制作用，15.11mg/L和10.64mg/L完全抑制菌核和孢子的萌发

Sporocarp A hard multicellular sporecontaining structure found in water ferns e.g.

孢子果：在水蕨中发现的坚硬多细胞结构，内含孢子。

Histological study indicated that low temperature inhibited microspore formation and caused abnormal multiplication of tapetum layer cells.

经切片观察，低温会造成绒毡层细胞的异常增殖，及产生多核性巨大小孢子，而阻止小孢子发育。

Microspore abortion of H9A occurred in the early uninucleate stage. The tapetum cells were in extreme hypertrophy so that tetrads were extruded to crack and break down and could not form normal uninucleate pollen grains; the abortion type was sporophyte.

结果表明，雄性不育材料H9A的小孢子败育发生在单核前期，由于绒毡层细胞极度膨胀，四分体受挤压后破裂并降解，无法形成正常的单核花粉粒，属于孢子体败育。

Could be observed on 10th day after pollination, archesporial cell on 20thday, megasporocyte on 24th day, the functional megaspore on 30th day; and 8-nucleate embryo sac on 41th day. And then double fertilization finish and early globular embryo emerg.

授粉10 d出现指状突起，20 d形成胚珠原基，24 d大孢子母细胞发生，30 d功能大孢子形成，41 d发育为成熟的八核胚囊，而后完成双受精发育成早期球形胚。

The typical anamorph spore in Ascomycetes = conidia produced outside a specialized hyphal cell.

典型无性孢子是分生孢子，外生于特殊菌丝细胞。

Mature pollen grain is of 2 - celled type .

花药壁的发育为基本型，小孢子减数分裂为连续型，小孢子四分体为四面体型，成熟花粉为二细胞型。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。