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- Pollen tetrads in Lilium with a discussion on the delimitation between L. sempervivoideum and its ally. 百合属中的四合花粉兼论玖红百合的分类问题.
- There is a high pollen count in the air. 空气中有很高的花粉计数。
- pollen tetrad 四分花粉
- Stamen is in the middle of a flower and may produce pollen. 雄蕊长在花的中央,能产生花粉。
- A microscopic fossil, as of a pollen grain or unicellular organism. 微体化石一种微小的化石,如花粉粒或单细胞有机体的化石
- The workers have little pollen baskets on their legs. 工蜂脚上有装花粉的小"篮子"。
- Anther is a part of a flower that contains the pollen. 花药是花的雄蕊上带花粉的部分。
- The micronuclei were not observed in tetrad stage . 四分体阶段有微核。
- The other cells of the tetrad undergo degeneration. 胚囊发育类型为单孢子蓼型胚囊;
- The innermost wall of a spore or pollen grain. 内壁孢子或花粉粒最深处的壁
- Pollen sterile blossoms lack normal turgor. 花粉不育的花朵缺乏正常的膨压现象。
- Pollen morphology of Vaccinium ashei was investigated by scanning electron microscopy.Most of pollen grains are tetrahedron with tetrad construction. 摘要扫描电镜下,兔眼越桔花粉为四合体,外形为准四面体,中等大小,表面具不规则皱波状纹饰,并有多处凹陷。
- It took 2-3 days from pollen mother cell to binary, 24 hours from binary to tetrad, and 3 days from tetrad to grains of pollen. 从花粉母细胞到二分体经过2-3天时间,二分体到四分体约24小时,四分体到花粉粒约3天左右。
- The pollen is shed directly on the stigma. 花粉直接散落在柱头上。
- Some people have an allergy to pollen. 一些人对花粉有过敏反应。
- Nectar and pollen are very nutritious. 花蜜和花粉是很有营养的。
- Pollinated by wind-dispersed pollen. 风媒传粉的通过风的飘散来传播花粉的
- The microspores in tetrad stage showed tetrahedron structure. 小孢子四分体为四面体型。
- Which undergoes meitotic division and forms a linear tetrad. 由孢原细胞直接发育形成大孢子母细胞。
- Abnormal development was observed at tetrad and mature embryo sac. 在四分体和成熟胚囊时期观察到了异常发育现象。