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Ecophysiological responses of Abies fabri seedlings to drought stress and nitrogen supply

2010; Wiley; Linguagem: Inglês

10.1111/j.1399-3054.2010.01370.x

1399-3054

Jianying Guo, Yan Yang, Genxu Wang, Liudong Yang, Xiangyang Sun,

Plant responses to elevated CO2

Physiologia PlantarumVolume 139, Issue 4 p. 335-347 Ecophysiological responses of Abies fabri seedlings to drought stress and nitrogen supply Jianying Guo, Jianying Guo Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China School of Tourism and Economy Management, Leshan Teachers College, Leshan 614000, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this authorYan Yang, Corresponding Author Yan Yang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China e-mail: [email protected]Search for more papers by this authorGenxu Wang, Genxu Wang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. ChinaSearch for more papers by this authorLiudong Yang, Liudong Yang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this authorXiangyang Sun, Xiangyang Sun Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this author Jianying Guo, Jianying Guo Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China School of Tourism and Economy Management, Leshan Teachers College, Leshan 614000, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this authorYan Yang, Corresponding Author Yan Yang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China e-mail: [email protected]Search for more papers by this authorGenxu Wang, Genxu Wang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. ChinaSearch for more papers by this authorLiudong Yang, Liudong Yang Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this authorXiangyang Sun, Xiangyang Sun Key Laboratory of Mountain Environmental Change and Regulation, Chengdu Institute of Mountain Hazards and Environment, The Alpine Ecosystem Observation and Experiment Station of the Gongga Mountain, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu 610041, P.R. China Graduate College of the Chinese Academy of Sciences, Beijing 100039, P.R. ChinaSearch for more papers by this author First published: 11 July 2010 https://doi.org/10.1111/j.1399-3054.2010.01370.xCitations: 15Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Abies fabri (Mast.) Craib. (A. fabri) is an endemic and dominant species in typical subalpine dark coniferous forests distributed in mountainous regions of Western Sichuan, China. We investigated the ecophysiological responses of A. fabri seedlings to short-term experimental drought, nitrogen supply and their interaction. Drought stress was created by excluding natural precipitation with automatically controlled plastic roof that covered the seedlings. Nitrogen fertilization was applied weekly by spraying over seedlings ammonium nitrate solution (50 kg N ha−1 year−1) during the growing season of 2009. The results showed that drought stress decreased leaf relative water content (RWC), whereas it caused marked increases in root mass ratio (RMR) and root/shoot mass ratio by 6.19 and 10.39%, respectively, as compared with the control. Drought stress increased malondialdehyde (MDA) content, electrolyte leakage, proline content, soluble sugars content and the activities of antioxidant enzymes, whereas nitrogen supply decreased MDA content, but enhanced activities of some antioxidant enzymes [especially peroxidase (POD)]. In the drought stressed plots, nitrogen supply increased RWC and decreased the content of MDA. The combination of drought stress and nitrogen supply also decreased the activities of antioxidant enzymes. These results indicated that the negative effects of drought stress on A. fabri seedlings might be alleviated by nitrogen supply. Citing Literature Volume139, Issue4August 2010Pages 335-347 RelatedInformation