single spike 中文意思是什麼
single spike
解釋
單尖峰信號-
Tufted perennial with strong creeping stolons ; leaf yellowish green to green, folded in bud ; leaf blade smooth, lanceolate, slightly bent at the joint with the sheath ; inflorescence of a terminal single raceme, spike - like, smooth, sub - sylindrical and slightly bent inwards
本種為多年生,簇生性,具強壯匍匐莖;葉綠至黃綠色,在芽期褶生,葉片多平滑,披針至長條形,先端略鈍,于葉鞘成一角度折生;花序為單一頂生總狀花序,光滑無毛,平扁,稍向內彎。 -
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
外形呈圖釘樣,由主體部和棘突組成,主體部包括帽狀體、細胞質帶和精核。帽狀體由約20根輻射狀排列的纖絲組成,纖絲具橫紋。其凸面延伸成棘突,棘突內纖絲是帽狀體內纖絲的延續,亦具橫紋。
分享友人