Multifunctional bracts enhance plant fitness during flowering and seed development in Rheum nobile (Polygonaceae), a giant herb endemic to the high Himalayas
Song, Bo1,2; Zhang, Zhi-Qiang1; Stoecklin, Juerg3; Yang, Yang1; Niu, Yang1; Chen, Jian-Guo1,2; Sun, Hang1
2013-06-01
发表期刊OECOLOGIA
ISSN0029-8549
卷号172期号:2页码:359-370
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.
关键词Abiotic Agent Floral Trait Pollen Protection Pollinator Attraction Reproductive Strategy
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]
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/16639
专题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.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
2013072423.pdf(422KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Song, Bo]的文章
[Zhang, Zhi-Qiang]的文章
[Stoecklin, Juerg]的文章
百度学术
百度学术中相似的文章
[Song, Bo]的文章
[Zhang, Zhi-Qiang]的文章
[Stoecklin, Juerg]的文章
必应学术
必应学术中相似的文章
[Song, Bo]的文章
[Zhang, Zhi-Qiang]的文章
[Stoecklin, Juerg]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

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。