LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA
Zhang, Keliang3; Baskin, Jerry M.; Baskin, Carol C.; Yang, Xuejun; Huang, Zhenying
刊名AMERICAN JOURNAL OF BOTANY
2015
卷号102期号:6页码:860-869
关键词Amphicarpaea bracteata Amphicarpaea edgeworthii amphicarpy diaspore heteromorphism eastern Asian-eastern North American disjunct distribution pattern seed dispersal seed dormancy soil seed bank
ISSN号0002-9122
DOI10.3732/ajb.1500069
文献子类Article
英文摘要Premise of the study: Many congeneric species are disjunct between eastern Asia and eastern North America. No previous study has compared the seed biology of closely related disjunct taxa of legumes or of a diaspore-heteromorphic species. Our objective was to compare seed dormancy in two such sister species in the genus Amphicarpaea (Fabaceae). Methods: We investigated the ecology and ecophysiology of aerial and subterranean seeds of the amphicarpic species Amphicarpaea edgeworthii from China and compared the results to those published for its sister species A. bracteata from eastern North America. Key results: The seed coat of aerial seeds of A. edgeworthii is well developed, whereas the seed coat of subterranean seeds is not. Aerial seeds have combinational dormancy (physical dormancy [PY] + physiological dormancy [PD]) broken by scarification followed by cold stratification or by after-ripening and scarification; whereas subterranean seeds have PD broken by cold stratification. Aerial seeds formed a persistent soil seed bank, and subterranean seeds a transient soil seed bank. Aerial seeds of A. bracteata also have PY+PD and subterranean seeds PD. Subterranean seeds of both species are desiccation intolerant. Conclusion: Dormancy in neither aerial nor subterranean seeds of both species has diverged over geological time. Compared to subterranean seeds, aerial seeds of both species dispersed over longer distances. Seed dispersal ability and degree of dormancy of neither species fits the high-risk/low-risk (H-H/L-L) strategy found in many diaspore-dimorphic species. Rather, both species have an H-L/L-H strategy for these two life history traits.
学科主题Plant Sciences
电子版国际标准刊号1537-2197
出版地HOBOKEN
WOS关键词GERMINATION ECOPHYSIOLOGY ; HETEROTHECA-LATIFOLIA ; ACHENE DIMORPHISM ; DISPERSAL ; BRACTEATA ; DORMANCY ; CONSEQUENCES ; LEGUMINOSAE ; STRATEGIES ; EVOLUTION
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
出版者WILEY
WOS记录号WOS:000356600800005
资助机构Key Basic Research and Development Plan of P. R. China [2012BAD16B03, 2012BAC01B05] ; National Natural Science Foundation of P. R. China [30872074, 31370705]
内容类型期刊论文
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/25901]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA
4.Baskin, Jerry M.; Baskin, Carol C.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA
推荐引用方式
GB/T 7714
Zhang, Keliang,Baskin, Jerry M.,Baskin, Carol C.,et al. LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA[J]. AMERICAN JOURNAL OF BOTANY,2015,102(6):860-869.
APA Zhang, Keliang,Baskin, Jerry M.,Baskin, Carol C.,Yang, Xuejun,&Huang, Zhenying.(2015).LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA.AMERICAN JOURNAL OF BOTANY,102(6),860-869.
MLA Zhang, Keliang,et al."LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA".AMERICAN JOURNAL OF BOTANY 102.6(2015):860-869.
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