Effects of enhanced UV-B radiation on growth and photosynthetic responses of four species of seedlings in subalpine forests of the eastern Tibet plateau
文献类型：期刊论文
| 作者 | Liu, Qing1; Yao, Xiaoqin1,2; Zhao, Chunzhang1; Cheng, Xinying1 |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2011-12 |
| 卷号 | 74页码:151-156 |
| 关键词 | Enhanced UV-B radiation Growth Photosynthesis Seedlings |
| ISSN号 | 0098-8472 |
| DOI | 10.1016/j.envexpbot.2011.05.013 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | We assessed the influence of enhanced UV-B radiation on growth, root morphology, leaf morphology and anatomy, pigment concentrations and gas exchange of seedlings of four tree species (Abies faxoniana, Acer mono, Picea asperata and Swida hemsleyi) from the southeastern Qinghai-Tibetan Plateau of China. Potted seedlings were exposed outdoors in Sichuan Province, China to two levels of UV-B (ambient UV-B, 11.02 KJ m(-2) day(-1); and enhanced UV-B. 14.33 KJ m(-2) day(-1)). Exposure to enhanced UV-B radiation had significant effects on seedling growth and morphological and photosynthetic traits of the four species. Total and belowground biomass was lower in seedlings exposed to enhanced UV-B radiation in all four species. Concentrations of photosynthetic pigments (Chl (a + b)) and UV-B-absorbing compounds in the leaves of all four species was lower in seedlings exposed to enhanced UV-B radiation, but the Chl a/b ratio was not affected. Enhanced UV-B markedly reduced the net photosynthetic rate and increased the intercellular CO(2) concentration in the four species. Differences in stomatal conductance to water vapor were observed in all four species. Responses differed among the four species. Generally, exposure to enhanced UV-B radiation led to shrinkage and curling of leaves in A. mono and S. hemsleyi seedlings, and reduced the leaf number and mass in A. mono seedlings. Exposure to enhanced UV-B radiation markedly reduced the palisade tissue thickness in A. mono leaves but led to thicker leaves in S. hemsleyi seedlings. These results imply that broad-leaved tree seedlings were more sensitive to enhanced UV-B radiation than conifer seedlings. (C) 2011 Elsevier B.V. All rights reserved. |
| 学科主题 | Plant Sciences |
| URL标识 | 查看原文 |
| WOS关键词 | ULTRAVIOLET-B ; PHYSIOLOGICAL-RESPONSES ; DESCHAMPSIA-ANTARCTICA ; COLOBANTHUS-QUITENSIS ; OZONE DEPLETION ; BETULA-PENDULA ; FIELD ; PLANTS ; EXPOSURE ; PIGMENTS |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000297492700020 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://210.75.237.14/handle/351003/29926]  |
| 专题 | 生物多样性与生态系统服务领域_生态研究 |
| 通讯作者 | Liu, Qing |
| 作者单位 | 1.Chinese Acad Sci, Chengdu Inst Biol, Ctr Ecol Studies, Chengdu 610041, Peoples R China; 2.Hebei Univ, Coll Life Sci, Baoding 071002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Qing,Yao, Xiaoqin,Zhao, Chunzhang,et al. Effects of enhanced UV-B radiation on growth and photosynthetic responses of four species of seedlings in subalpine forests of the eastern Tibet plateau[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2011,74:151-156. |
| APA | Liu, Qing,Yao, Xiaoqin,Zhao, Chunzhang,&Cheng, Xinying.(2011).Effects of enhanced UV-B radiation on growth and photosynthetic responses of four species of seedlings in subalpine forests of the eastern Tibet plateau.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,74,151-156. |
| MLA | Liu, Qing,et al."Effects of enhanced UV-B radiation on growth and photosynthetic responses of four species of seedlings in subalpine forests of the eastern Tibet plateau".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 74(2011):151-156. |
入库方式： OAI收割
来源：成都生物研究所
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