文献类型：期刊文献

英文题名：ORGANOGENESIS OF REPRODUCTIVE STRUCTURES IN BETULA ALNOIDES (BETULACEAE)

作者：Lin, Ruo-Zhu[1,2] Zeng, Jie[3] Chen, Zhi-Duan[1]

第一作者：Lin, Ruo-Zhu

通信作者：Chen, ZD[1]

机构：[1]Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China;[2]Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;[3]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2010

卷号：171

期号：6

起止页码：586-594

外文期刊名：INTERNATIONAL JOURNAL OF PLANT SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000279042600002)】；

基金：This research was financially supported by the Chinese Academy of Sciences (KSCX2-YW-R-136), the National Natural Science Foundation of China (NSFC30570106, NSFC30740088, and 30370094), and the Ministry of Science and Technology of China (2006BAD01A1603 and 2007CBI411600). We thank Wei Cheng, Er Sha, Zhi-Gang Zhao, and Jun-Jie Guo at the Research Institute of Tropical Forestry, Chinese Academy of Forestry, for their help in collecting the material and Rui-Qi Li, Yin-Hou Xiao, and Jie Wen for assistance with SEM observations. Our sincere thanks go to Nathan Jud at the University of Maryland and two anonymous reviewers for their detailed comments and suggestions on earlier versions of this manuscript.

语种：英文

外文关键词：Betula alnoides; primordium; organogenesis pattern; unisexual flower

摘要：In order to scrutinize the floral development of the unisexual Betula alnoides and to discuss the organogenesis throughout other members of Betulaceae, the inflorescences, cymules, and flowers of B. alnoides were examined using scanning electron microscopy. In staminate flowers, there is no vestige of the carpel, and a 90 degrees change in the orientation of two stamen primordia was noted during the developmental process. Tepals are usually laminar but vary in number and morphology. Secondary bracts are laminar, similar to the tepals. Pistillate flowers lack stamen primordia; tepals are arrested in early development, and the secondary bracts are more reduced than bracts in the male flowers. Despite this contrasting morphology, the organogenesis pattern of male and female cymules and flowers is similar. Bracts and tepals keep the same arrangements in both genders. The orientation of stamens and carpels is also consistent. Phylogenetic relationships within the family are discussed. The division of Betulaceae into Coryleae and Betuleae and the sister group relationship between Betula and Alnus are reinforced in the aspect of floral ontogeny.