首页 | 本刊简介 | 编委会 | 投稿征稿 | 期刊订阅 | 下载中心 | English
 
   
  论文快速检索

请输入关键词

 

 

   
  信息公告
海外撷英栏目开通,欢迎投稿

热带亚热带植物学报网络开通

访问总次数
14385803
今日访问
661
当前在线
0人
 
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 3550次   下载 2022 本文二维码信息
码上扫一扫!
分享到: 微信 更多
麻黄属种子表面纹饰的多样性及其系统学意义
杨永
中国科学院植物研究所生物多样性信息学重点实验室
摘要:  麻黄属(Ephedra)的分子系统学研究结果明显不同于基于雌球果成熟苞片质地的传统分类,指出麻黄属的形态特征和分子特征存在冲突。对麻黄属53种植物的种子表面微形态特征进行了研究,结果表明麻黄属的种子表面纹饰包括3种主要类型,即横向片层型(T型)、乳突型(P型)和扁平型(S型)。麻黄属的种子表面纹饰特征既与宏观形态特征不相关,也与分子系统学的研究结果不相关,表明该属微形态特征、宏观形态特征和分子特征之间的更多冲突。在欧洲和东亚发现的与买麻藤类有关的几个大化石带有T型种子表面纹饰,暗示具有T型纹饰的麻黄类植物在早白垩纪就十分多样。
关键词:  麻黄  买麻藤目  扫描电镜  种子表面纹饰  系统学
DOI:10.3969/j.issn.1005-3395.2011.01.001
分类号:
基金项目:Supported by the National Natural Science Foundation of China (30970177, 30600035); Knowledge Innovation Program of Chinese Academy of Sciences (KSCX2-YW-Z-067); LSEB of IBCAS, and National Science Foundation Grant (ATOL-0629657) to Dr. Ickert-Bond
Cuticular Diversity of the Seed Outer Envelope in Ephedra (Ephedraceae) with a Discussion on Its Systematic significance
YANG Yong
Key Laboratory of Biodiversity Informatics, Institute of Botany, the Chinese Academy of Sciences
Abstract:  Recent molecular systematic studies have consistently given results markedly different from the traditional classifications of Ephedra based on such macromorphological characters as the bract nature of ripe female cones, suggesting a serious conflict occurs between molecular and morphological characters. The cuticular micromorphology of the seed outer envelope (SOE) of living Ephedra encompassing 53 extant taxa of Ephedra were investigated. The results indicates that sculpture of SOE of Ephedra bears useful characters and includes 3 major types, viz. the Transverse lamellar type (T-type), the Papillate type (P-type), and the Smooth-Striated-Reticulate type (S-type). Further analyses implied that sculptural characters of SOE show correlation neither with macromorphology nor with molecular within Ephedra, indicating additional conflicting characters between macromorphology, micromorphology, and molecular. Several megafossil species associated with the Gnetales from Early Cretaceous in both Europe and E Asia were found to bear the T-type sculpture of SOE, indicating that species of Ephedra with the T-type seed envelope were once highly diversified in Early Cretaceous.
Key words:  Ephedra  Gnetales  Scanning electron microscopy (SEM)  Seed outer envelope (SOE)  Systematics

Copyright 2007 版权所有 中国科学院华南植物园《热带亚热带植物学报》编辑部
地址: 广州市天河区兴科路723号 中国科学院华南植物园 《热带亚热带植物学报》编辑部 邮编:510650 电话: 86 (0)20-3725 2514  传真:86 (0)20-3725 2642 E-mail: jtsb@scib.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09084417号-2