- 更多网络例句与花粉粒外壁相关的网络例句 [注：此内容来源于网络，仅供参考]
-
The results offer the condition that these plants of Ajuga could be distinguished by size and ornamentation of exhymenine.
结果表明，同属三种植物的形态特征相似，可通过叶形及花期是否具基生叶，花萼的形态，花冠颜色以及茎的生长方式和植株被毛情况等予以鉴别；通过对三种植物的花、根、茎、叶及全草粉末的组织构造观察，认为种间差异较小，可依据毛茸的分布及形态特征和茎的木化程度不同加以鉴别；对三者花粉粒进行了扫描电镜观察，发现其大小和外壁纹饰具有明显差异，为三者的鉴别提供了有力的依据，也为该属的分类及植物花粉形态研究提供了花粉形态学方面的资料。
-
The pollen morphology of 5 species of Corydalis from northeast China was observed and compared by SEM.
用扫描电镜对东北延胡索极其近缘植物的花粉形态进行了观察，结果发现花粉粒在形状、大小、外壁纹饰、沟的长短及宽度等方面均有区别，从中获得了东北延胡索及其近缘植物分类方面的孢粉学依据。
-
Pollen morphology of the Chinese monotypic genus Dichotomanthes and its out-group Prinsepia utilis were investigated from the point of view of pollen development. The SEM observation revealed that there is not any change in morphology and sculpture of pollen grains from the young pollen grain seperated from callose of tetraspore to the mature pollen grain in Dichotomanthes tristaniaecarpa. Only the volume of pollen grain increased with maturity.
从发育的角度研究了中国特有单种属Dichotomanthes Kurz及与其系统学研究有关的外类群Prinsepia utilis的花粉形态，扫描电镜观察显示Dichotomanthes花粉粒自脱离四分体胼胝质膜开始至成熟二核花粉粒不同发育时期，花粉形态和外壁纹饰未见变化，仅花粉体积随成熟度增加而有所增大。
-
The results showed that the species of Oxalis could be classified on the basis of the shape, the size and exine sculpture of pollen grains.
结果表明：该属花粉粒大小、形状和外壁雕纹可作为分种的依据。
-
Through comparative analysis on the pollen exine ornamentation of Lycoris we think that the pollen characters of Lycoris is relative steady and basically uniform, the shape of pollen grains are all long sphericity, all species have reticulate ornamentation, but there are large varieties between species in Lycoris on these aspects such as the pollen size , Finely reticulate ornamentation or coarsely reticulate ornamentation,psilate muri or curve muri,having spinulose or not and the spinulose position.
通过对石蒜属花粉外壁纹饰特征的比较分析，认为本属植物花粉特征较为稳定，形态基本一致，均为长球形花粉粒，花粉外壁均为网状纹饰；但在花粉大小、粗网或细网纹饰，网脊平滑或弯曲，有无小乳突或小瘤以及乳突着生部位等方面在种间有明显的变化，可以作为区分种的依据。3。
-
Combining the previous research on the pollen morphology, the present study indicated that: the plants of Stachyurus shared the common characters in pollen morphology and exine ultrastructure.
结果表明：旌节花属植物花粉形态的共同特征是：花粉粒球形或近球形，三孔沟；外壁具穴状纹饰，穴较细小；外壁内壁分层明显，容易区分，覆盖层光滑，几无附属物，柱状层明显，穿孔较少，不形成半覆盖层。
-
The sac structure projected through the pollen aperture possesses the typical nature of transfer cell, i. e complex lybrinthian wall ingrowth and abundant mitochondria, RER, dicotysomes and ribosomes under the wall. Its outer surface is closely related to the tapetal protoplast. The accumulation of storaged material in pollen start at the area near the apertures. Above restults indicate the pollen apertures may be the"door"from where nutrition flows into pollen in P. hortorum.
绒毡层物质向花粉粒的短途运输明显的表现在花粉的萌发孔区，一方面形成向外突起的囊腔，另一方面在这里具有发达的壁迷宫，而且迷宫下具丰富的线粒体，RER和高尔基体等细胞器，此外花粉内贮藏物的大量积累首先从萌发孔附近开始以及萌发孔处与绒毡层有紧密接触都说明天竺葵花粉萌发孔可能是物质进入花粉的&门户&。
-
The pollen morphology of 5 species of Corydalis from northeast China was observed and compared by SEM.
文摘：用扫描电镜对东北延胡索极其近缘植物的花粉形态进行了观察，结果发现花粉粒在形状、大小、外壁纹饰、沟的长短及宽度等方面均有区别，从中获得了东北延胡索及其近缘植物分类方面的孢粉学依据。
- 更多网络解释与花粉粒外壁相关的网络解释 [注：此内容来源于网络，仅供参考]
-
exine; extine：(花粉粒)外壁
(花粉;胞子的)內膜 Endosporium; intine | (花粉粒)外壁 exine; extine | (花粉粒的)外壁 extine
-
generative cell：生殖细胞
成熟的小孢子具有2个退化的原叶细胞(prothallial)、1个大的管细胞(tube cell)和1个较小的生殖细胞(generative cell),外壁向两侧突出形成气囊. 小孢子囊破裂后,花粉粒散出,随风飘扬. 在石炭纪、二叠纪的地球植被中,除了外貌像蕨的种子蕨之外,
-
intine：内壁
外壁(exine)、内壁(intine)、花粉粒外壁(exine):较厚,硬而缺乏弹性. 主要成分为孢粉素,此外尚有纤维素、类胡萝卜素、类黄酮素、脂类及蛋白质,所以花粉粒常呈现黄、橙色. 外壁的雕纹变化很大,常构成美丽的图案. 这是孢粉学(Palynology)研究的主要内容.
-
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.