帽状体的英文

[植物学] calyptra

• 帽:    cap; hat; helmet; ...
• 状:    form; shape
• 体:    body; part of the ...

例句与用法

1. The second leaf takes place at the basal part of the first leaf and originates from the shoot apex cells when the first leaf pierces the calyptra
   第一叶突出帽状体之后，由第一叶基部保留下来的茎干顶端细胞产生第二叶。
2. 2 . sperm ultrastructure the sperm is nonflagellated and composed of a main body in which including nucleus n apical cap and a little cytoplasm and a single spike extending from the convex surface of the apical cap , which consists of about twenty radial fibrillae on which exhibiting periodic cross - striations . the concave surface of the apical cap surrounds the little cytoplasm which is highly condensed and has n ' t any organella and sperm nucleus , which is uncondensed and composed of filamentous materials and many membrane - bound vesicles
   外形呈图钉样，由主体部和棘突组成，主体部包括帽状体、细胞质带和精核。帽状体由约20根辐射状排列的纤丝组成，纤丝具横纹。其凸面延伸成棘突，棘突内纤丝是帽状体内纤丝的延续，亦具横纹。