pollen grain

常見(jiàn)例句

Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
成熟花粉多為2-細(xì)胞型，偶見(jiàn)3-細(xì)胞型，具三萌發(fā)孔。
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The characteristics of pollen grain are related with the distribution of Gnetum and classified system of subgenus.
買(mǎi)麻藤屬植物孢粉學(xué)特征與地理分布及屬下分類系統(tǒng)有一定的關(guān)系。
The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.
小孢子壁形成時(shí)開(kāi)始在絨氈層內(nèi)切線壁出現(xiàn)的球狀體到花粉粒成熟時(shí)仍有一部分附著于花粉粒表面。