The morphological diversity of pollen in the genus Gossypium

文献类型： 外文期刊

第一作者： Cai, Xiaoyan

作者： Cai, Xiaoyan;Hou, Yuqing;Muhammad, Umer Jawad;Wang, Heng;Xu, Yanchao;Zheng, Jie;Wang, Yuhong;Liu, Fang;Zhou, Zhongli;Wang, Kunbo;Cai, Xiaoyan;Zheng, Jie;Hua, Jinping

作者机构：

关键词： Cotton; Scanning electron microscopy; Pollen morphology; Diversity

期刊名称：JOURNAL OF COTTON RESEARCH （ 影响因子：2.6； 五年影响因子：2.8 ）

ISSN： 2096-5044

年卷期： 2023 年 6 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundPlant pollen has diverse morphological characteristics that can be consistently passed down from generation to generation. Information on pollen morphology is thus immensely important for plant classification and identification. In the genus Gossypium, however, in-depth research on pollen morphology is lacking, with only few reports on limited cotton species. To evaluate the diversity of pollen in Gossypium, we therefore conducted a comprehensive analysis of the pollen morphology of 33 cotton species and varieties using scanning electron microscopy.ResultsThe 33 analyzed cotton samples exhibited common pollen morphological features, including spherical shapes, radial symmetry, echination, panporation, and operculation, while the pollen size, spine shape, spine density and length showed distinctive features. Pollen size varied significantly among species, with diameters ranging from 62.43 mu m in G. harknessii to 103.41 mu m in G. barbadense. The exine had an echinate sculptural texture, and spines were mostly conical or sharply conical but occasionally rod-like. Spine density varied from 173 in G. incanum to 54 in G. gossypioides, while spine length ranged from 3.53 mu m in G. herbaceum to 9.47 mu m in G. barbadense. In addition, the 33 cotton species and varieties were grouped at a genetic distance of 3.83 into three clusters. Cluster I comprised five allotetraploid AD-genome cotton species, four D-genome species, and one K-genome species. Cluster II included 13 diploid species from A, B, D, E, and G genomes, whereas Cluster III only consisted one E-genome species G. incanum.ConclusionsAlthough pollen characteristics alone are not enough to resolve taxonomic and systematic relationships within the genus Gossypium, our results add to knowledge on palynomorphology and contribute to phenological information on these taxa. Our findings should aid future systematic and phylogenetic studies of the Gossypium genus.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序