萌发孔

内稃包在外稃内，由长方形细胞组成。（3）巨龙竹成熟花粉为呈近球形，具有单个萌发孔，在显微镜下萌发孔呈凸面镜形状。

Palea which is composed of quadrate cell is on the inside of Lemma . ( 3 ) The mature pollen of Dendrocalamus sinicus is nearly spherical with a single germinal aperture , which is globose under microscope .

结果表明，敖汉苜蓿在人工授粉10min后花粉粒的内壁穿过外壁的萌发孔向外突出，20min时形成花粉管，1h后花粉管触及柱头，而后沿花柱道伸长。

The result showed that internal wall of pollen passes through the germination aperture in the external wall and protruded in 10 minutes of artificial pollination . After 20 minutes a pollen tube forms .

小麦花粉萌发孔与雄性不育关系初探

Relationship between the aperture and the male sterile lines of wheat

成熟花粉粒为2细胞型，具3萌发孔；

The mature pollen grain with 3 germinal pores is 2-cell type .

具3沟萌发孔的花粉为本属基本类型。

The tricolpate of the genus are the basic type .

萌发孔直径与年相对湿度呈弱的正相关。

Diameter of apertures is positive related weakly with annual relative humidity .

离体、活体条件下部分禾谷类植物的多萌发孔花粉粒萌发观察

Observation on Germination of pollen grains with multi-aperture of cereals in vitro or in vivo

雀稗属花粉形态及其多萌发孔现象

Pollen morphology and poly-aperture in paspalum

结果显示：本属花粉形态基本一致，即球形，无萌发孔，无覆盖层，具微刺，是一个非常自然的类群。

Pollen morphology of the species is basically uniform , I e. spherical , inaperturate , intectate and spinulose .

临界点干燥法能观察到自然干燥法观察不到的花粉三顶距、萌发孔等特征。

Meanwhile , the aperture and the three apical aperture distance can be observed with the critical point drying method .

成熟的花粉粒为球形，具一个萌发孔，直径48（45～52）μm。

The mature pollen grain is round , has one aperture and a diameter of 48 ( 45-52 ) μ m.

本试验对10个葡萄品种及22个野生种的花粉大小及萌发孔形状进行了观察。

The size and the forms of aperture of 10 cultivars and 22 species of pollen in Vitis were studied .

10%的花粉粒带有2个萌发孔，并各具有萌发力。

6 ) . 10 % pollens had two germ pores ( TGP ) and all produced its own pollen tube .

细胞学分析的结果显示ms121在花粉壁发育的过程中，萌发孔的孢粉素片层的形成出现异常，导致花粉粒萌发孔的塞子无法正常形成。

Results of cytological analysis indicated that forming of sporopollenin lamella was defected during pollen development , which leads to abnormal pollen operculum .

很多特点表明，木犀属花粉的萌发孔在木犀科中处于由简单萌发孔向复合萌发孔过渡的阶段。

Some characters indicate that the pollen aperture of genus Osmanthus is on the transitional stage from simple to compound apertures in Oleaceae .

雄配子体发育过程包括2次有丝分裂，成熟花粉为3细胞型，具3个萌发孔。

During the development of the male gametophytes , mitosis took place two times and the mature pollens were three-cell ones with three apertures .

成熟花粉粒2核，1萌发孔；

Each of the mature pollen grains has 2 nuclei , 1 germination pore , Its ovule is anatropous , double integument and tenuinucellate .

运用扫描电子显微镜，对陕西省境内30种常见蜜源植物的花粉粒进行了观察研究，描述了花粉粒的大小、萌发孔类型及其表面纹饰等形态特征。

This studies were conducted with morphology on pollens in30 of the honey plants commonly distributed in Shaanxi , by means of scanning electron microscope .

结果表明，桂花花粉在大小、形状、萌发孔形态等性状上表现出种内多样性，并表现出桂花花粉极轴长由小到大、沟长系数由小到大的演化趋势；

The results indicate that the pollen size 、 shape and germinal furrow characteristic are different among samples . The evolutionary trend is also induced .

种间花粉形态区别于花粉粒的大小，萌发孔的数量，花粉外壁纹饰的类型及突起密度。

However , there exist differences of species in pollen size , the number of aperture , the density and type of granular on pollen surface .

结果表明：欧李花粉形态为长球形或椭圆形，萌发孔为三孔沟类型；

The result showed as below : the pollen shape of the Chinese dwarf cherry were nearly spheroidal or super-spheroidal and the type of apertures are tricolporate .

四倍体刺槐自身花粉粒的形状结构之间表现出丰富的变异：体积与形状多样，萌发孔沟的数量及位置不固定，外壁表面的纹饰特征彼此不同等等；

There were remarkable variations in the shape , volume , location and number of bourgeon-hole channels and veins on surface of pollen among pollens of TRP .

根据萌发孔的数目，外壁纹饰等特征，该属花粉可划分为三个类型：（1）具3沟，外壁具穿孔，表面散生小刺状突起；

According to the position and number of the aperture and ornamentation of exine , the pollen grains are divided into three type : ( 1 ) tricolpate-perforation type ;

根据花粉萌发孔类型和外壁纹饰特征，可将这些植物的花粉归为4个类型：（1）具3孔沟，外壁具网状纹饰。

In the light of the aperture type and exine ornamentation , four types of pollen grains could be identified : ( 1 ) 3-colporate pollen with reticulate exine ornamentation .

萌发孔沟的长度、宽度、孔盖长宽与形状、突起的程度等，在个体间有差异。

The pollen grains with different ecological style of germinal apertures in length , width , length and width of lid , shape of lid and the extent of protuberances etc.

对于种的划分，因子囊孢子的形态结构稳定，其大小、形状、萌发孔的数量及着生位置都比较恒定，应作为划分种的最重要的标准。

The characteristics of ascospore , such as size , shape , symmetry , structure , pigmentation , presence , position and number of germ pores are the most important classified criteria of species .

小孢子第一次有丝分裂前夕，细胞质在核向萌发孔的一面集中并形成穿过中央大液泡的细胞质索。

Just before the first mitosis of microspore , cytoplasm arise from one side of the nucleus facing the aperture and form a cytoplasmic strand which connects with the cytoplasm of external end of pollen through the large central vacuole .

花粉极面观形状基本一致，但花粉萌发沟孔深度、花粉赤道面形状及花粉粒大小均有一定程度的差异。

The polar faces and ornamentation of pollen were basically same , but some diversities on the germ furrow depth , equatorial face and size of pollen were observed .

成熟花粉粒圆型，具有三个萌发沟，花粉外壁呈网状，萌发孔具有孔盖，萌发沟、表层具有小颗粒。

The mature pollen was circle with three germinal furrows . The exterior wall of pollen was a reticulation . There was a lid on the germination aperture , and there were small grains on the surface layer of germination furrows with cover . 4 .