Pollen morphology and ultrastructure of selected species from Annonaceae
Pollen morphology and ultrastructure of selected species from Annonaceae
复制标题
番荔枝科选定物种的花粉形态和超微结构
DOI：
10.1007/s00606-012-0698-1
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发表时间：
2012
影响因子：
1.9
通讯作者：
Louis Ronse De Craene
中科院分区：
文献类型：
--
作者：
Fengxia Xu;Louis Ronse De Craene
通过扫描和透射电子显微镜观察，描述了番荔枝科7属1个变种9种新鲜花粉的形态和超微结构。花粉粒椭圆形，具一条沟，或二裂。有些是球形的，没有可见的光圈，也没有任何极点的迹象。纹饰光滑，具皱纹，具刺或疣。顶盖通常是连续的，在整个颗粒上具有相同的厚度，但孔口区除外，在孔口区，外壁分子往往是不可察觉的。幕下可呈颗粒状，或柱状和颗粒状混合在一起。足层由连续或不规则扭曲的叶理组成。Endxine明显而薄，在一些种中厚度略有不同，但在其他种中可模糊区分。内壁是双层的，由内壁和更均匀的内壁组成，内壁有许多具有管状延伸的囊泡-纤维成分。关于番荔枝科植物中是否存在依地辛的争议也被讨论，但它的存在是否是祖先的还不能确定。关于新鲜花粉的数据与来自类似干燥花粉研究的数据进行了比较。
The morphology and ultrastructure of fresh pollen from nine species, one including two varieties representing seven genera of Annonaceae are described based on observations with scanning and transmission electron microscopy. The pollen grains are elliptic with a single furrow, or disulculate. Some are globose with no visible aperture or any indication of a pole. Ornamentation is smooth, rugulate, echinate or verrucate. The tectum is usually continuous and of the same thickness over the whole grain except for the aperture zone, where the exine elements are very often imperceptible. The infratectum may be granular, or columellae and granules are mixed together. The foot layer consists of continuous or irregularly contorted foliations. The endexine is distinct and thin, and varies slightly in thickness in some species, but is vaguely distinguishable in others. The intine is two-layered and consists of an entexine with many vesicular-fibrillar components with tubular extensions, and a more homogeneous endintine. The controversy around the presence of an endexine in Annonaceae is discussed, but whether its presence is ancestral cannot be determined. Data on fresh pollen are compared with those from similar studies on dried pollen.
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影响因子：
0.9
作者：
M. Remizowa;D. Sokoloff;T. Macfarlane;S. Yadav;C. Prychid;P. Rudall
通讯作者：
M. Remizowa;D. Sokoloff;T. Macfarlane;S. Yadav;C. Prychid;P. Rudall
影响因子：
1.9
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1.9
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作者：
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通讯作者：
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影响因子：
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通讯作者：
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