一个特定地区的植被类型是通过识别和计算那里发现的各种花粉粒来确定的。
The type of vegetation in a specific region is determined by identifying and counting the various pollen grains found there.
花粉粒:为何这么多？
成熟花粉粒中多糖和蛋白质并存。
The polysaccharoses present in the mature pollen grain accompary with proteins.
但金桂花粉粒要比四季桂稍微圆一点。
O. fragrans cv Jingui is a little rounder than O. fragrans cv Sijigui.
花粉粒和雌蕊都具有活力。
败育花粉的特征是花粉粒小，超微结构异常。
The abortive pollen was small than normal pollen and it's microstructure was abnormal.
花粉粒富含线粒体、高尔基体以及内质网上。
Pollen grains are rich in mitochondria, Golgi apparatus, and endoplasmic reticulum.
鞋子会把外面的花粉粒、尘埃和泥土带到家中。
Shoes can carry pollen, dirt and soil from outside, spreading it through your home.
花粉粒表面仅两端具颗粒纹饰，其余部分光滑；
Pollen surface granulate merely on the shoulders of mescolpium, but smooth all the rest;
成熟花粉粒大多是二细胞型，很少产生三细胞型。
Mature pollen grains were mostly two-celled, rarely three-celled.
花粉粒败育形态多种多样，有不规则形，梭形，圆形等。
Abortive shapes of pollen grains were in varied forms, such as irregular, round and spindle etc.
研究发现，着落在花上的花粉粒数和菌孢子数呈强正相关。
Numbers of pollen grains and spores deposited on flowers were strongly and positively correlated.
不育性表现方式有：无花粉粒、花药吐不出、花药不散粉。
Their sterility showed no pollen grains, anther could not been shed, anther couldn't shed pollen.
而SP3代H 8株系两性花的花粉粒皱缩、扁瘪、塌陷。
But H8 strain's pollen grain of SP3 generation is distorted and shrunken.
黄色箭头所示为可育花粉粒，蓝色箭头所示为不育花粉粒。
Yellow arrows show fertile pollens and blue arrows show sterile pollens.
随着温度的升高，花粉粒发育速度加快，雄蕊败育趋势增加。
With the rise of temperature , the development of pollen speeded up, the abortive trend of stamen increased.
花粉粒的外部形态结构，是影响该螨能否取食的重要因素之一。
Surface structure of the pollen grains was found to be one of the major factors affecting the feeding behavior of the predator.
生育期较长的品种花粉粒似较长，而生育期短的品种花粉粒较短。
The shape of the pollen extended in length in long growth period varieties in comparison with short growth period varieties.
小孢子发育过程涉及花药发育到花粉粒成熟过程中一系列基因的表达。
The expressions of a series of genes are involved in the anther and pollen development.
从未成熟的花粉粒或者切下的完整的花药中再生出单倍体植株的过程。
Anther culture (pollen culture) the generation of haploid plants from immature pollen grains or intact excised anthers.
结论：续断属为一自然分类群，花粉粒的细微差异对种的划分有一定意义。
Conclusion: Dipsacus is a natural class group, and the slight difference of its pollen grains is useful to some extent in the division of species.
作者用扫描电子显微镜观察了103个桃品种和3个桃近缘野生种的花粉粒。
Pollen grains of 103 peach cultivars were examined using the Scanning Electron Microscopy.
结果表明：11份花粉都呈近球形，花粉粒大小在所观察的材料间有较大差异。
The results showed that the pollen shapes of all 11 cultivars were near spherical in equatorial view. The size of pollen grain showed great variation among cultivars.
甘兰型油菜萝卜细胞质雄性不育系的花粉败育发生在四分体至单核花粉粒阶段。
There occurs pollen abortion during the stage from tetrad to single nucleus pollen grain of cytoplasmic male-sterile line in Brassica napus Var. oleifera(Raphanus sativus L. ).
本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。
In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.
以黑松花粉粒和花粉管为试验材料，研究了离子注入对细胞骨架系统的损伤效应。
The damage of the cytoskeleton system in the pollen and the pollen tube of Pinus thunbergii induced by ion beam implantation were researched.
空气中花粉粒的调查研究属气传孢粉应用学科，它正愈来愈受到临床医学界的重视。
The investigation of airborne pollen grains belongs to the applied aeropalynology, which is getting more and more attention in clinical medical subject.
结果表明：所研究的植物花粉粒在大小、形态、萌发器官和外壁纹饰上有明显差异；
The results showed that there were obvious differences among the pollen grains in terms of pollen size, shape, colour and surface structures.
它被放大了115倍，其中包括猫毛、扭曲的合成和羊毛纤维、花粉粒、植物和昆虫之类的长毛。
It has been magnified 115 times, but it contains long hairs such as cat fur, twisted synthetic and woollen fibres, a pollen grain, plant and insects.
它被放大了115倍，其中包括猫毛、扭曲的合成和羊毛纤维、花粉粒、植物和昆虫之类的长毛。
It has been magnified 115 times, but it contains long hairs such as cat fur, twisted synthetic and woollen fibres, a pollen grain, plant and insects.
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