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。
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。
This picture shows a grain of willow pollen wedged between flower petals.
这张图片显示了嵌入花瓣间的柳树花粉颗粒。
It's hard to believe something as small as a grain of pollen could cause so much misery.
很难相信的东西作为一个小的花粉可能导致粮食这么多的苦难。
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 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。
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。
Results Observation of 14519 grain of airborne pollen per one year.
结果一年的曝片调查，共观察到14519粒花粉；
It is better to use the grain amount of single pollen in its main pollen season to analyze the relationship with meteorological factors.
在分析气象因素与空中飘散花粉粒数的相关性时，最好选择单种花粉粒，并选择其飘散较为稳定的时段进行。
The Holocene stratum of Quzhou district is quite different from other areas of Hebei Plain in terms of the buried depth, thickness, depletion rate, color, grain size, structure and pollen assemblages.
河北平原南部曲周地区的全新世地层，在埋藏深度、地层厚度、堆积速率和颜色、粒度结构、孢粉含量与种属等方面，与河北平原其他地区不同。
The mature pollen grain is of 2-cell.
成熟花粉为二细胞型。
The mature pollen grain is of 2-cell.
成熟花粉为二细胞型。
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