The pumpkin pollen grain in the middle is0.2mm and just about visible to the naked eye
中间的南瓜花粉有0.2毫米，肉眼刚刚能看见。
The mature pollen grain is 2-celled.
成熟花粉为2 -细胞型。
The mature pollen grain is of 2-cell.
成熟花粉为二细胞型。
But H8 strain's pollen grain of SP3 generation is distorted and shrunken.
而SP3代H 8株系两性花的花粉粒皱缩、扁瘪、塌陷。
In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.
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。
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.
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。
Surface structured silica hollow microspheres were synthesized using the rape pollen grain as a biotemplate via a facile sol-gel method and a succedent calcinations process.
利用油菜花粉作为生物模板，通过溶胶在花粉颗粒表面包裹，再经高温烧结去除花粉颗粒的方法制备了具有特殊表面形貌的二氧化硅中空微球。
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. ).
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。
The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.
小孢子壁形成时开始在绒毡层内切线壁出现的球状体到花粉粒成熟时仍有一部分附着于花粉粒表面。
Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
成熟花粉多为2 -细胞型，偶见3 -细胞型，具三萌发孔。
Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
成熟花粉多为2 -细胞型，偶见3 -细胞型，具三萌发孔。
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