The morphological diversity of pollen in the genus Gossypium

作     者：CAI Xiaoyan HOU Yuqing MUHAMMAD Umer Jawad WANG Heng XU Yanchao ZHENG Jie WANG Yuhong LIU Fang ZHOU Zhongli HUA Jinping WANG Kunbo CAI Xiaoyan;HOU Yuqing;MUHAMMAD Umer Jawad;WANG Heng;XU Yanchao;ZHENG Jie;WANG Yuhong;LIU Fang;ZHOU Zhongli;HUA Jinping;WANG Kunbo

作者机构：State Key Laboratory of Cotton BiologyInstitute of Cotton ResearchChinese Academy of Agricultural SciencesAnyang 455000HenanChina National Nanfan Research Institute(Sanya)Chinese Academy of Agriculture SciencesSanya 572025HainanChina College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China 

出 版 物：《Journal of Cotton Research》 (棉花研究（英文）)

年 卷 期：2023年第6卷第1期

页      面：48-59页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：This research was supported by the grants from the National Natural Science Foundation of China(32072023) the Project of Sanya Yazhou Bay Science and Technology City(SCKJ-JYRC-2022-88) 

主　　题：Cotton Scanning electron microscopy Pollen morphology Diversity 

摘      要：Background Plant pollen has diverse morphological characteristics that can be consistently passed down from generation to *** on pollen morphology is thus immensely important for plant classification and *** the genus Gossypium,however,in-depth research on pollen morphology is lacking,with only few reports on limited cotton *** 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 *** The 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 *** size varied significantly among species,with diameters ranging from62.43 μm in *** to 103.41 μm in *** exine had an echinate sculptural texture,and spines were mostly conical or sharply conical but occasionally *** density varied from 173 in *** to 54 in ***,while spine length ranged from 3.53 μm in *** to 9.47 μm in *** addition,the 33cotton species and varieties were grouped at a genetic distance of 3.83 into three *** Ⅰ comprised five allotetraploid AD-genome cotton species,four D-genome species,and one K-genome *** Ⅱ included 13diploid species from A,B,D,E,and G genomes,whereas Cluster Ⅲ only consisted one E-genome species *** Although 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 *** findings should aid future systematic and phylogenetic studies of the Gossypium genus.