impotence of pollen grain 花粉粒不育
structure of pollen grain 花粉粒的构造
forcing culture of pollen grain 花粉粒催芽培养
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。
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