英语词汇“pollen grain”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

pollen grain

noun

Each of the microscopic particles, typically single cells, of which pollen is composed. Pollen grains have a tough coat that has a form characteristic of the plant producing it.The pollen grain is the male gametophytic phase of flowering plants....

The pollen grain (male gametophyte) is a three-celled structure composed of two generative cells encased within the vegetative cell.
The transfer of the pollen grain (male gametophyte) from the stamen to the stigma initiates the processes that can result in fertilization.

单词	pollen grain
释义	pollen grain noun Each of the microscopic particles, typically single cells, of which pollen is composed. Pollen grains have a tough coat that has a form characteristic of the plant producing it.The pollen grain is the male gametophytic phase of flowering plants.... The pollen grain (male gametophyte) is a three-celled structure composed of two generative cells encased within the vegetative cell. The transfer of the pollen grain (male gametophyte) from the stamen to the stigma initiates the processes that can result in fertilization.
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