花粉外壁

核糖体由蛋白质和RNA组成，核糖体形成的高电子密度球形体中的蛋白质沉积于花粉外壁腔隙成为花粉外壁蛋白。

Ribosomes are constituted with protein and RNA , the protein portion of high electronic dense globules accumulates to the exine of pollen grains forming the exine protein .

结果表明：堇菜属植物花粉外壁光滑，无纹饰；

The results showed that pollen wall of the Genus is smooth .

蓼科花粉外壁超微结构的研究

Studies on pollen ex in e ultrastructure of the Polygonaceae

几种柑橘属植物花粉外壁超微结构比较研究

A Comparative Study on Pollen Exine Ultrastructure of Several Citrus

大豆属部分种花粉外壁超微结构的研究

A study on the exine ultrastucture of pollen grain of some species in genus Glycine

供试材料花粉外壁超微结构特征各异，说明了柑橘属植物的遗传多样性；

The pollen exine ultrastructure is different from each other , which specifies the genetic diversification of citrus .

不同产区采集的花粉外壁纹饰不同，呈鱼鳞状或颗粒状突起，可分成光滑型、粗糙型和中间型。

The ornamentation of pollen exine was scaly or granular and also different from regions , which can be divided into smooth type , rough type and intermediate-type .

蓼属&未知花粉类型外壁超微结构的研究

Ultrastructural studies of a new pollen type exine of Polygonum

葡萄花粉形态外壁纹饰研究及其演化趋势的推测

The Studies on Morphology and Extine Sculpture and Evolution Tendency of Pollen in Vitis

结果表明，在扫描电子显微镜下，花粉的外壁纹饰非常清晰，萌发器官类型鉴定准确。

The results showed that the ornamentation of pollen out wall is very clear , germination organ type can be identified correctly ;

4种植物花粉的外壁纹饰及叶表面扫描及根、茎、叶的超薄切片的电镜超微结构找出相关的差异。

Morphological characters of pollen wall and leaf surface were observed with scanning electron microscope and ultra structure of roots , stem and leaves were investigated with transmission electron microscope .

花粉粒外壁纹饰的样式、花粉粒的大小，结合其它的分类学证据，证明我们将紫苏属植物分为一种5变种的分类方法是恰当的。

The ornamentation pattern and size of pollen grains jointly provide evidence that it is appropriate to use them to classify the genus Perilla into five varieties of one species . 3 .

本文研究了该科植物的生活习性、外部形态、花粉形态和外壁超微结构以及花器官发生，并根据多个DNA区段的序列探讨了科的系统位置和属下关系。

The present study examined its habits , morphology , pollen morphology including exine ultrastructure , floral organogenesis , and molecular phylogeny based on multiple regions of DNA sequences .

中国紫草科破布木属花粉形态和外壁超微结构

Pollen Morphology and Exine Ultrastructure of Genus Cordia in Boraginaceae in China

国产山龙眼科花粉形态及外壁超微结构的研究

Pollen morphology and wall ultrastructure of Proteaceae in China

狼尾草花粉在单孢花粉期，花粉外壁外层仅为一层，至二孢花粉期柱状层才开始分化，然后逐渐形成覆盖层和基层。

In the pollen of pennisetum , the columnar layer began to form until bicellulate pollen stage .

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 .

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 .