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题名: Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery
作者: Kang, HM; Chen, K; Bai, J; Wang, G(王刚)
收录类别: SCIE ; BIOSIS
出版日期: 2012-11
刊名: ACTA PHYSIOLOGIAE PLANTARUM
卷号: 34, 期号:6, 页码:2145-2154
出版者: SPRINGER
出版地: HEIDELBERG
英文摘要: For investigating the protective roles of antioxidative system in desiccation tolerance of Caragana species as they adapt to arid environments, we monitored a variety of ecophysiological parameters in the leaves of Caragana arborescens (mesophyte), C. microphylla (semiarid species), C. roborovskyi, C. stenophylla, C. acanthophylla, and C. tragacanthoides (xerophyte) grown under a drying-rehydration cycle. Relative leaf water content and chlorophyll content were decreased by 17.4-39.2 %, and by 14-40 %, respectively, after exposure to 48 days of drought stress. Malondialdehyde did not increase in xeric Caragana species. Hydrogen peroxide concentrations increased by 13.1-43.9 % except in C. acanthophylla. The activities of superoxide dismutase (SOD), guaiacol peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR) and reduced glutathione (GSH) in xeric Caragana species were significantly elevated with progressing drought stress. However, catalase in all species decreased markedly before drought stress treatment reached 40 days. The xeric Caragana species showed higher SOD, POD, APX, and GR activities, as well as ascorbate content, and more manganese SOD isoenzymes. C. arborescens and C. microphylla accumulated more free proline. Our data indicate that SOD and POD with the ascorbate-glutathione cycle have important protective effects in xeric Caragana species under drought stress. Free proline may be crucial in the resistance of C. arborescens and C. microphylla to drought stress.
关键词: Antioxidative enzymes ; Antioxidative metabolites ; Caragana species ; Drought stress ; Reactivated oxygen species
作者部门: [Kang, Hong-Mei ; Wang, Gang] Lanzhou Univ, Minist Educ, Key Lab Arid & Grassland Agroecol, Lanzhou 730000, Peoples R China ; [Kang, Hong-Mei] Gansu Acad Sci, Inst Biol, Lanzhou 730000, Peoples R China ; [Chen, Kang] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China ; [Bai, Juan] NW A&F Univ, Coll Life Sci, Xian 712100, Peoples R China
通讯作者: Wang, G (reprint author), Lanzhou Univ, Minist Educ, Key Lab Arid & Grassland Agroecol, Lanzhou 730000, Peoples R China.
学科分类: Plant Sciences
文章类型: Article
所属项目编号: State Key Basic Research and Development Plan of China [2002CB111505]
所属项目名称: 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: MOST
语种: 英语
DOI: 10.1007/s11738-012-1015-x
ISSN号: 0137-5881
WOS记录号: WOS:000310165900009
BIOSIS记录号: BIOSIS:PREV201300000139
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/115226
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Kang, HM,Chen, K,Bai, J,et al. Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery[J]. ACTA PHYSIOLOGIAE PLANTARUM,2012,34(6):2145-2154.
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