sexine

sexine的基本解释

n.

外层(孢粉)

与sexine相关的网络例句 [注：此内容来源于网络，仅供参考]

Ca〓 precipitates in the cells of epidermis and endothecium disappeared; however, many Ca〓 precipitates still deposited on the surface of Ubish bodies and the sexine and in the cells of vascular bundle.

花药中的Ca〓沉淀主要分布在绒毡层、乌氏体表面、花粉外壁、韧皮部细胞和连接组织细胞中。

The colpus membrane consists of a thin foot-layer and intine, while the sexine elements are reduced gradually.

在远极面萌发沟区域，外壁逐渐减薄，最后覆盖层和柱状层消失，仅残留基层。

After the early uninucleate stage, nearly all of Peiai 64S microspores possessed malfunctional exine that was deviod of electron transparent region between sexine and nexine, and no intine was established.

早期小孢子形成之后，几乎所有小孢子外壁均发育异常，表层与里层之间界限不清，缺少中间透明带，同时内壁没有形成。

与sexine相关的网络解释 [注：此内容来源于网络，仅供参考]

tectum：覆盖层

基粒棒的顶端扩展、联结,形成覆盖层(tectum). 覆盖层、基粒棒层(baculum)构成花粉外壁(exine)的外层(sexine),基足层又称为花粉外壁内层Ⅰ,花粉的质膜分泌纤维素物质,形成外壁内层Ⅱ,它与基足层(内层Ⅰ)共构成花粉外壁内层.

massula：花粉小块

14.011 花粉块 pollinium | 14.012 花粉小块 massula | 14.014 外壁外层 sexine