Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery

doi:10.1007/s11738-012-1015-x

IOCAS-IR > 实验海洋生物学重点实验室

	Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery
	Kang, Hong-Mei 1,2; Chen, Kang 3; Bai, Juan 4; Wang, Gang 1; Wang, G (reprint author), Lanzhou Univ, Minist Educ, Key Lab Arid & Grassland Agroecol, Lanzhou 730000, Peoples R China.
	2012-11-01
发表期刊	ACTA PHYSIOLOGIAE PLANTARUM
ISSN	0137-5881
卷号	34 期号:6 页码:2145-2154
文章类型	Article
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
学科领域	Plant Sciences
DOI	10.1007/s11738-012-1015-x
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000310165900009
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/12284
专题	实验海洋生物学重点实验室
通讯作者	Wang, G (reprint author), Lanzhou Univ, Minist Educ, Key Lab Arid & Grassland Agroecol, Lanzhou 730000, Peoples R China.
作者单位	1.Lanzhou Univ, Minist Educ, Key Lab Arid & Grassland Agroecol, Lanzhou 730000, Peoples R China 2.Gansu Acad Sci, Inst Biol, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.NW A&F Univ, Coll Life Sci, Xian 712100, Peoples R China
推荐引用方式 GB/T 7714	Kang, Hong-Mei,Chen, Kang,Bai, Juan,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.
APA	Kang, Hong-Mei,Chen, Kang,Bai, Juan,Wang, Gang,&Wang, G .(2012).Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery.ACTA PHYSIOLOGIAE PLANTARUM,34(6),2145-2154.
MLA	Kang, Hong-Mei,et al."Antioxidative system's responses in the leaves of six Caragana species during drought stress and recovery".ACTA PHYSIOLOGIAE PLANTARUM 34.6(2012):2145-2154.

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