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- The microspores are arranged in a tetrahedral tetrad.The mature pollen grains are of the 2-celled and 3-celled types.The ovary is 5-locular. 小孢子四分体为四面体型排列，成熟花粉有2-细胞和3-细胞型2种。
- PMC and pollen sterility.More than 90% of matured pollen grains were sterile. 成熟花粉粒中90%25以上为败育花粉，属碘败型。
- Mature pollen grain 成熟花粉
- 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 innermost wall of a spore or pollen grain. 内壁孢子或花粉粒最深处的壁
- Abundant starches were stored in the mature pollen. 花粉成熟时，其细胞质中积累了丰富的淀粉粒。
- Pollen grain trilobate in polar view. 花粉粒三裂在极面观。
- Pollen grain semiangular in polar view. 花粉粒半具角在极面观。
- 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
- We can see spinous pollen grain in the fruit by microscope. 显微观察可见，果中的刺球状花粉粒最为显著。
- The contents of the pollen grain represent the male gametophyte. 花粉粒为雄性配子体。
- Then the mature pollen is released from the dehiscesd anther, and pollination occurs. 当花粉成熟时，花粉粒从花粉囊中释放出来进行受精。
- At the mature pollen stage, certain amount of callose accumulates in cytoplasm of the vegetative cell. 二胞花粉晚期，药室内壁加厚完成，，营养细胞的细胞质中积累了大量胼胝质。
- The microsporic tetrads of the fertile line belonged to the tetrahedral type, and mature pollen was two-celled with bristles on the surface. 可育系小孢子母细胞经过减数分裂形成四面体形的四分体，成熟花粉是二细胞型，表面有刺。
- Both the pollen grains and the gynoecia are active. 花粉粒和雌蕊都具有活力。
- The pollen grains still to keep tetrahedral form. 小孢子四分体为四面体型。
- Pollen grains triporate, exine reticulate. 花粉粒三孔，外壁网状。
- Pollen grains prolate, semicircular in polar view. 花粉粒长球形，半圆的在极面观。
- Furthermore, the mature pollen in 3-ccll type, the de development of the another wall belongs to the bicotylednous type, and the tapetum belongs to the glandular tapetum. 成熟的花粉粒为3细胞型；花药壁发育为双子叶型，绒毡层为腺质绒毡层。
- Pollen grains prolate, smooth, not reticulate. 花粉粒长球形，平滑，不为网状。
