sexine

基本解釋

There is some space between sexine and nexine.
外層電子密度相對(duì)較小，內(nèi)層電子密度相對(duì)較大；
The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.
花粉壁的外壁分爲(wèi)外層和內(nèi)層，外層包括覆蓋層、基粒棒和基足層等三層，內(nèi)層衹包含一層。
the sexine and nexine are separated and form remarkable vestibulum.Uunder the optical sect ion view, nexine thickens in the apertural region.
光學(xué)顯微鏡下，4-5孔，孔的結(jié)搆特殊，內(nèi)、外層到孔邊分離，形成顯著的孔室。