Seed germination and seedling emergence of three annuals growing on desert sand dunes in China
文献类型：期刊论文
| 作者 | Tobe, K; Zhang, LP; Omasa, K |
| 刊名 | ANNALS OF BOTANY
 |
| 出版日期 | 2005-03-01 |
| 卷号 | 95期号:4页码:649-659 |
| 关键词 | Agriophyllum squarrosum Aristida adscensionis Bassia dasyphylla irrigation regimes mechanical resistance of sand oxygen deficiency sand hardening seed burial depth seedling survival temperature effects |
| ISSN号 | 0305-7364 |
| DOI | 10.1093/aob/mci060 |
| 通讯作者 | Tobe, K(tobe@nies.go.jp) |
| 英文摘要 | Background and Aims Information on the initial growth characteristics of annuals found in Chinese deserts is very limited. The aim of this study was to investigate seed germination and interactive effects of irrigation and seed burial depth in sand on seedling emergence and seedling survival in three annuals (Agriophyllum squarrosum, Bassia dasyphylla and Aristida adscensionis) commonly growing on sand dunes in these regions. Methods Effects of temperature, light and polyethylene glycol-6000 on seed germination were examined by irrigating seeds sown on filter paper in Petri dishes. Seedling emergence was examined for seeds sown on the surface of, or at different depths (5, 10, 20, 30, 40 and 50 mm) in, sand-filled pots, which were irrigated under different regimes. For seeds buried at a depth of 50 mm, seed viability was examined after irrigation of the pots. Key Results Seeds of three species germinated at most temperatures recorded between spring and autumn in their native habitats. No seed dormancy was found in any species. For all three species, seedling emergence was most favoured when seeds were buried at a depth of 10 mm. When seeds sown on the sand surface were irrigated, seed germination was considerably suppressed due to water deficiency, but many seeds remained viable. For A. squarrosum and B. dasyphylla, many seeds that were deeply buried and irrigated remained ungerminated but viable, while for A. adscensionis deeply buried seeds germinated, but the seedlings did not emerge due to unfavourable seedling growth in deep sand. Conclusions Precipitation is the most crucial factor in determining the seasonal emergence of seedlings of the three tested species in the field. The vertical distribution of seeds in sand determines the proportion of seeds that germinate after precipitation and acts to maintain seed banks over multiple years. (C) 2005 Annals of Botany Company. |
| 收录类别 | SCI |
| WOS关键词 | BET-HEDGING GERMINATION ; NORTH-CENTRAL CHINA ; WESTERN-AUSTRALIA ; ARID REGION ; REGULATING MECHANISMS ; WINTER ANNUALS ; ANNUAL PLANTS ; SURVIVAL ; BURIAL ; GROWTH |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000227437800009 |
| 出版者 | OXFORD UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555647 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Tobe, K |
| 作者单位 | 1.Natl Inst Environm Studies, Lab Intellectual Fundamentals Environm Studies, Tsukuba, Ibaraki 3058506, Japan 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Univ Tokyo, Grad Sch Agr & Life Sci, Bunkyo, Tokyo 1138657, Japan |
| 推荐引用方式 GB/T 7714 | Tobe, K,Zhang, LP,Omasa, K. Seed germination and seedling emergence of three annuals growing on desert sand dunes in China[J]. ANNALS OF BOTANY,2005,95(4):649-659. |
| APA | Tobe, K,Zhang, LP,&Omasa, K.(2005).Seed germination and seedling emergence of three annuals growing on desert sand dunes in China.ANNALS OF BOTANY,95(4),649-659. |
| MLA | Tobe, K,et al."Seed germination and seedling emergence of three annuals growing on desert sand dunes in China".ANNALS OF BOTANY 95.4(2005):649-659. |
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来源：寒区旱区环境与工程研究所
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