LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA

doi:10.3732/ajb.1500069

	LACK OF DIVERGENCE IN SEED ECOLOGY OF TWO AMPHICARPAEA (FABACEAE) SPECIES DISJUNCT BETWEEN EASTERN ASIA AND EASTERN NORTH AMERICA
	Zhang, Keliang 3; Baskin, Jerry M.; Baskin, Carol C.; Yang, Xuejun ; Huang, Zhenying
	2015
发表期刊	AMERICAN JOURNAL OF BOTANY
ISSN	0002-9122
卷号	102 期号:6 页码:860-869
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.
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
学科领域	Plant Sciences
DOI	10.3732/ajb.1500069
收录类别	SCI
语种	英语
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)
WOS记录号	WOS:000356600800005
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1537-2197
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]
作者邮箱	zhenying@ibcas.ac.cn
作品OA属性	Bronze
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Baskin, Jerry M.; Baskin, Carol C.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA 3.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA 4.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
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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