Seed germination and seedling emergence in the extremely endangered species Rhododendron protistum var. giganteum-the world's largest Rhododendron
文献类型：期刊论文
| 作者 | Shen, Shi-Kang; Wu, Fu-Qin; Yang, Guan-Song; Wang, Yue-Hua; Sun, Wei-Bang
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| 刊名 | FLORA
 |
| 出版日期 | 2015 |
| 卷号 | 216页码:65-70 |
| 关键词 | Big tree rhododendron Conservation Gibberellic acid Photoperiod Threatened species |
| 英文摘要 | Big tree rhododendron, Rhododendron protistum var. giganteum (Ericaceae) is an endangered and important germplasm source with high ornamental value in China. To design appropriate germination and seedling establishment protocols for a species conservation and restoration program, we studied the effects of temperature, photoperiod, storage, and gibberellic acid (GA(3)) treatment on seed germination in a laboratory experiment. The effects of soil substrate and sowing depth on seedling emergence were studied in a greenhouse experiment. We hypothesized that photoperiod is a limiting factor for seed germination of big tree rhododendron, and soil type and sowing depth would affect seedling emergence. Results showed that seeds of big tree rhododendron were non-dormant, and temperature significantly affected germination percentages (GP) and mean germination time (MGT). The optimal temperatures for seed germination were relatively low (15 degrees C and 20 degrees C). High temperature negatively affected seed germination. The seeds had less than 5% of GP when incubated in complete darkness, suggesting that darkness significantly inhibits seed germination. Storage period and temperature had significant effect on GP and MGT of big tree rhododendron seeds, and the effect of their interaction on MGT was also significant. GA(3) treatment increased GP and germination speed. Soil substrates did not significantly affect seedling emergence, but native soil is beneficial to seedling growth. When the seeds were sown on the soil surface, seedling emergence was higher than 80%, but it decreased with increasing sowing depth, and no seedling emerged at 3 cm soil depth. We present some suggestions for the ex situ conservation and restoration program, including seed germination and seedling artificial propagation of big tree rhododendron based on the research results. (C) 2015 Elsevier GmbH. All rights reserved. |
| 类目[WOS] | Plant Sciences ; Ecology |
| 研究领域[WOS] | Plant Sciences ; Environmental Sciences & Ecology |
| 关键词[WOS] | TEMPERATURE ; LIGHT ; CONSERVATION ; CHINA ; RESTORATION ; DESICCATION ; SURVIVAL ; ECOLOGY ; STORAGE ; GROWTH |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000363352500008 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/25219]  |
| 专题 | 昆明植物研究所_资源植物与生物技术所级重点实验室 |
| 推荐引用方式 GB/T 7714 | Shen, Shi-Kang,Wu, Fu-Qin,Yang, Guan-Song,et al. Seed germination and seedling emergence in the extremely endangered species Rhododendron protistum var. giganteum-the world's largest Rhododendron[J]. FLORA,2015,216:65-70. |
| APA | Shen, Shi-Kang,Wu, Fu-Qin,Yang, Guan-Song,Wang, Yue-Hua,&Sun, Wei-Bang.(2015).Seed germination and seedling emergence in the extremely endangered species Rhododendron protistum var. giganteum-the world's largest Rhododendron.FLORA,216,65-70. |
| MLA | Shen, Shi-Kang,et al."Seed germination and seedling emergence in the extremely endangered species Rhododendron protistum var. giganteum-the world's largest Rhododendron".FLORA 216(2015):65-70. |
入库方式： OAI收割
来源：昆明植物研究所
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