exine
外孢壁
常用释义
英音[ ˈeksɪn; -aɪn ]
美音[ ˈekˌsaɪn ]
基本释义
- n. 外孢壁，外膜
例句
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1·Alveolae of the proximal exine are smaller and less regular in form than those at equatorial region.近极区的穴较之赤道区的要小且形状较不规则。
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2·Except for some differences in exine ornamentation and pollen size, there is no great evolutionary divergence among genera in pollen morphology.总体来讲，花粉没有大的演化分异，只是表面纹饰和花粉大小有一定的差异。
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3·Method: Pollen exine ultrastructure were compared for 18 populations growing under in the same environment by means of scanning electron microscope (SEM).方法：借助扫描电镜对栽培在同一生境下的18个半夏居群的花粉形态、大小及表面纹饰等特征进行观测比较。
同义词
n.
[植]外孢壁，外膜