Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/S0960258516000143 |
Germination and persistence in soil of the dimorphic diaspores of Atriplex centralasiatica | |
Zhang, Rui1; Wang, Yan Rong1; Baskin, Jerry M.2; Baskin, Carol C.2,3; Luo, Kai1; Hu, Xiao Wen1 | |
通讯作者 | Wang, Yan Rong ; Hu, Xiao Wen |
来源期刊 | SEED SCIENCE RESEARCH
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ISSN | 0960-2585 |
EISSN | 1475-2735 |
出版年 | 2016 |
卷号 | 26期号:3页码:273-283 |
英文摘要 | The fruit plus accessory parts, and thus not only the fruit or seed, is the diaspore in some species of flowering plants. Atriplex centralasiatica, a summer annual salt-secreting cold-desert halophyte of central Asia that produces flat and humped diaspores, is such a species. The dispersal/germination units of this diaspore-heteromorphic species are fruits enclosed in persistent bracteoles’. Germination of black and brown fruits (i.e. bracteoles’ removed) of this species has been studied in some detail previously, but little attention has been given to the germination biology of the intact diaspores. The aim of this study was to compare the germination biology of the intact diaspores of A. centralasiatica, and their fates in the field during 12 months on the soil surface and buried at 5-cm depth. Fresh flat diaspores germinated to 42.7-51.3% in light (12-h photoperiod) and to 16.0-59.3% in constant dark, over a temperature range of 15-20/30 degrees C, while no freshly matured humped diaspores did so under any temperature/light regime. Neither gibberellin (GA(3)) nor potassium nitrate (KNO3) had an effect on germination of either diaspore. Both diaspores readily imbibed water, and removal of bracteoles’ released most of the dormancy. Thus, the bracteoles’ are primarily responsible for diaspore dormancy in A. centralasiatica. Humped diaspores persisted for a longer period in the soil than flat ones. The germination requirements of intact natural dispersal/germination units of A. centralasiatica differ from those previously reported for fruits of this species. |
英文关键词 | Atriplex cold-desert annual dimorphic diaspores physiological dormancy seed dormancy seed persistence in soil |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000384412200007 |
WOS关键词 | SALSOLA-AFFINIS CHENOPODIACEAE ; SEED-GERMINATION ; HETEROTHECA-LATIFOLIA ; ACHENE DIMORPHISM ; DORMANCY ; DISPERSAL ; ECOLOGY ; BRACTEOLES ; PHOTOSYNTHESIS ; CONSEQUENCES |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/196400 |
作者单位 | 1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China; 2.Univ Kentucky, Dept Biol, Lexington, KY 40506 USA; 3.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA |
推荐引用方式 GB/T 7714 | Zhang, Rui,Wang, Yan Rong,Baskin, Jerry M.,et al. Germination and persistence in soil of the dimorphic diaspores of Atriplex centralasiatica[J]. 兰州大学,2016,26(3):273-283. |
APA | Zhang, Rui,Wang, Yan Rong,Baskin, Jerry M.,Baskin, Carol C.,Luo, Kai,&Hu, Xiao Wen.(2016).Germination and persistence in soil of the dimorphic diaspores of Atriplex centralasiatica.SEED SCIENCE RESEARCH,26(3),273-283. |
MLA | Zhang, Rui,et al."Germination and persistence in soil of the dimorphic diaspores of Atriplex centralasiatica".SEED SCIENCE RESEARCH 26.3(2016):273-283. |
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