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孢囊孢子

与 孢囊孢子 相关的网络例句 [注:此内容来源于网络,仅供参考]

In the late of April of the second year, male inflorescences unbound and pollinated. When female inflorescences accepted the pollen grains, ovary development was increased in early May. With the development of either of the two ovule, funiculus, integument and nucellus were differentiated. Embryo sac mother cell came into being and the meiosis begins. Then fuctional megaspore developed into matured embryo sac that contain eight nucleuses. In the end of May, double fertilization generated.

次年,4月下旬,雄花序解螺旋散粉,雌花序开花授粉;5月上旬,雌花序授粉后,迅速增长,子房膨大,两个胚珠分化出珠柄、珠被和珠心,珠心中产生孢原细胞;5月中下旬,大孢子母细胞形成并减数分裂,功能性大孢子形成成熟的八核胚囊;5月底,发生双受精。

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。

Stomia The site at which a sporangium or pollen sac ruptures to release the spores or pollen.

裂口:孢子囊或花粉囊的开裂位置,小孢子或花粉粒从中散出。

The ovary of Phyllostachys praecox had one anatropous ovule. The crassinucellate ovule had diploid integuments. The monosporic embryo sac had one tetrad which turned on line and many antipodal cells. The synergid had the obvious filiform appratus.

3雷竹子房1室,内具1个倒生胚珠;双珠被,厚珠心;蓼型胚囊,单孢发育,线形大孢子四分体,具多个反足细胞,助细胞具明显丝状器。

Eusporangiate Describing the condition, found in clubmosses, horsetails, and certain ferns in which the sporangia develop from a group of initial cells and do not have an elaborate spore dispersal mechanism.

厚囊蕨:用来描述发现于石松纲、木贼类以及一些蕨类植物,其孢子囊由一组原始细胞发育而来,没有复杂的孢子散布机制。

A unisexual reproductive structure of gymnospermous plants such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that develop pollen-bearing sacs or naked ovules or seeds.

球果单性裸子植物的生殖器,例如针叶树和铁树目植物,一般由覆满鳞片和褶皱的中心轴构成,长螺旋状排列的孢子叶,孢子叶最终成为花粉囊或裸露的孢子或种子

A unisexual reproductive structure of gymnospermous plants such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that develop pollen-bearing sacs or naked ''.

球果单性裸子植物的生殖器,例如针叶树和铁树目植物,一般由覆满鳞片和褶皱的中心轴构成,长螺旋状排列的孢子叶,孢子叶最终成为花粉囊或裸露的孢子或种子

It"s vegetal mycelia were colorless, smooth, 1.2μm~3.0μm crude, manyconidiogenous cells born on vegetal mycelia, sometimes as many as a dozen,a very small number were single. The base of conidiogenous cell wasenlarged and many of them were bottle-shaped or spherical. The upper ofconidiogenous cell extended into a conidiogenous axis of 1μm wide and 14μm length which was the knee-bending ("Z like bending), there were small pectinae on the axis, conidium located on the small pectina.

营养菌丝无色,光滑,有隔,粗1.0μm~3.0μm,产孢细胞常浓密簇生于菌丝或泡囊上,有时可多达十几个,极少数单生,产孢细胞基部膨大,多为瓶形,近球形,颈部明显延长成粗1μm,最长达14μm的产孢轴,呈膝状弯曲,轴上具小齿突,分生孢子位于小齿突上。

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推荐网络例句

The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性,因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊,这是第二次你打败了我!

So a kind of strong antagonism permeated in the relations of two countries.

所以两国这一时期的政治关系始终弥漫着一种强烈的对抗情绪。