期刊
AMERICAN JOURNAL OF BOTANY
卷 102, 期 11, 页码 1814-1841出版社
BOTANICAL SOC AMER INC
DOI: 10.3732/ajb.1500300
关键词
aril; chalaza; embryo; ginger; micropyle; monocotyledon; operculum; seed coat; synchrotron-based x-ray tomographic microscopy (SRXTM); testa
资金
- Heliconia Society International award
- National Science Foundation [DEB 1257080, 1257701]
- National Parks Board, Singapore
- Czech Science Foundation, GACR [P506-14-13541S]
- Integrated Infrastructure Initiative (I3)
- European Community's Seventh Framework Program (FP7) under (CALIPSO) SLS [312284]
- Argonne National Laboratory [DE-AC02-06CH11357]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Direct For Biological Sciences [1257080] Funding Source: National Science Foundation
- Division Of Environmental Biology [1257080] Funding Source: National Science Foundation
PREMISE OF THE STUDY: Recent phylogenetic analyses based on molecular data suggested that the monocot family Zingiberaceae be separated into four subfamilies and four tribes. Robust morphological characters to support these clades are lacking. Seeds were analyzed in a phylogenetic context to test independently the circumscription of clades and to better understand evolution of seed characters within Zingiberaceae. METHODS: Seventy-five species from three of the four subfamilies were analyzed using synchrotron based x-ray tomographic microscopy (SRXTM) and scored for 39 morphoanatomical characters. KEY RESULTS: Zingiberaceae seeds are some of the most structurally complex seeds in angiosperms. No single seed character was found to distinguish each subfamily, but combinations of characters were found to differentiate between the subfamilies. Recognition of the tribes based on seeds was possible for Globbeae, but not for Alpinieae, Riedelieae, or Zingibereae, due to considerable variation. CONCLUSIONS: SRXTM is an excellent, nondestructive tool to capture morphoanatomical variation of seeds and allows for the study of taxa with limited material available. Alpinioideae, Siphonochiloideae, Tamijioideae, and Zingiberoideae are well supported based on both molecular and morphological data, including multiple seed characters. Globbeae are well supported as a distinctive tribe within the Zingiberoideae, but no other tribe could be differentiated using seeds due to considerable homoplasy when compared with currently accepted relationships based on molecular data. Novel seed characters suggest tribal affinities for two currently unplaced Zingiberaceae taxa: Siliquamomum may be related to Riedelieae and Monolophus to Zingibereae, but further work is needed before formal revision of the family.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据