Multifunctional bracts enhance plant fitness during flowering and seed development in Rheum nobile (Polygonaceae), a giant herb endemic to the high Himalayas
文献类型：期刊论文
| 作者 | Song, Bo1,2; Zhang, Zhi-Qiang1; Stoecklin, Juerg3; Yang, Yang1 ; Niu, Yang1; Chen, Jian-Guo1,2; Sun, Hang1
|
| 刊名 | OECOLOGIA
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 172期号:2页码:359-370 |
| 关键词 | Abiotic agent Floral trait Pollen protection Pollinator attraction Reproductive strategy |
| ISSN号 | 0029-8549 |
| 通讯作者 | Sun, H (reprint author), Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China. ; hsun@mail.kib.ac.cn |
| 英文摘要 | Specialized bracts are thought to be important for the successful reproduction of some plants and are regarded as adaptations to diverse driving forces. However, few empirical studies have quantified the adaptive significance of bracts within a cost-benefit framework. We explored the adaptive significance of large and showy bracts for reproduction in Rheum nobile, a giant herb endemic to the high Himalayas. We examined whether the bracts enhance reproductive success during flowering and seed development. Bracts increased flower and fruit temperature on sunny days, greatly decreased the intensity of ultraviolet-B (UV-B) radiation reaching flowers and fruits, and prevented pollen grains being washed away by rain. Experiments indicated that high temperature could promote pollen germination, while pollen grains exposed to rain and UV-B radiation at ambient levels were seriously damaged. Furthermore, bract removal decreased the number of pollinators visiting flowers. When bracts were removed before or after flowering, fecundity and progeny quality were adversely affected, but seed predation by larvae of pollinators decreased. A cost-benefit analysis demonstrated that the cost of bracts, i.e., increased seed predation, is modest. Our results suggest that the bracts of R. nobile promote pollen germination, protect pollen grains from rain and intense UV-B radiation, enhance pollinator visitation during flowering, and facilitate the development of fertilized ovules during seed development. We conclude that multifunctional bracts of R. nobile are an effective adaptive strategy in alpine environments and might have been selected for because of abiotic environmental conditions as well as for enhancing pollination success. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Ecology |
| 类目[WOS] | Ecology |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | ULTRAVIOLET-B RADIATION ; CICER-ARIETINUM L. ; TEMPERATURE REGULATION ; THOMSON POLYGONACEAE ; TRANSLUCENT BRACTS ; INSECT POLLINATORS ; FLORAL HEAT ; IN-VITRO ; HOOK-F ; UV-B |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [40930209, 31061160184, 31100179, 31200184]; Chinese Academy of Sciences [2011312D11022]; Natural Science Foundation of Yunnan Province [2011FB102]; Western Light Talent Culture Project; China Postdoctoral Science Foundation [2012T50787] |
| 语种 | 英语 |
| WOS记录号 | WOS:000319077100006 |
| 公开日期 | 2013-07-24 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/16639]  |
| 专题 | 昆明植物研究所_中国科学院东亚植物多样性与生物地理学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Univ Basel, Inst Bot, CH-4056 Basel, Switzerland |
| 推荐引用方式 GB/T 7714 | Song, Bo,Zhang, Zhi-Qiang,Stoecklin, Juerg,et al. Multifunctional bracts enhance plant fitness during flowering and seed development in Rheum nobile (Polygonaceae), a giant herb endemic to the high Himalayas[J]. OECOLOGIA,2013,172(2):359-370. |
| APA | Song, Bo.,Zhang, Zhi-Qiang.,Stoecklin, Juerg.,Yang, Yang.,Niu, Yang.,...&Sun, Hang.(2013).Multifunctional bracts enhance plant fitness during flowering and seed development in Rheum nobile (Polygonaceae), a giant herb endemic to the high Himalayas.OECOLOGIA,172(2),359-370. |
| MLA | Song, Bo,et al."Multifunctional bracts enhance plant fitness during flowering and seed development in Rheum nobile (Polygonaceae), a giant herb endemic to the high Himalayas".OECOLOGIA 172.2(2013):359-370. |
入库方式： OAI收割
来源：昆明植物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。