pollen tube
noun /ˈpɒlən tjuːb/
/ˈpɑːlən tuːb/
(biology- a tube that grows when pollen lands on the stigma (= a part of the female organ) of a flower to carry the male cell to the ovule (= the part that contains the female cell)
花粉管
词汇 | pollen tube |
释义 | pollen tubenoun /ˈpɒlən tjuːb/ /ˈpɑːlən tuːb/ (biology
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