Examination of Antioxidative System's Responses in the Different Phases of Drought Stress and During Recovery in Desert Plant Reaumuria soongorica (Pall.) Maxim

doi:10.1007/s12374-009-9053-7

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	Examination of Antioxidative System's Responses in the Different Phases of Drought Stress and During Recovery in Desert Plant Reaumuria soongorica (Pall.) Maxim
	Bai, Juan 1; Gong, Chun-Mei 1; Chen, Kang 3; Kang, Hong-Mei 2; Wang, Gang 2
	2009-10-01
发表期刊	JOURNAL OF PLANT BIOLOGY
ISSN	1226-9239
卷号	52 期号:5 页码:417-425
文章类型	Article
摘要	The aim of this study was to test the protective roles of superoxide dismutases (SODs), guaiacol peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) against oxidative damage and their activities in different phases of the dry down process in Reaumuria soongorica (Pall.) Maxim. leaves. Drought stress was imposed during 100 consecutive days and rewatering after 16, 72, and 100 days. The concentration of hydrogen peroxide (H(2)O(2)), malondialdehyde, and SODs activities were elevated significantly with progressing drought stress. POD and CAT activities increased markedly in the early phase of drought and decreased significantly with further drought stress continuation, and POD activity was unable to recover after rewatering. Ascorbate, reduced glutathione, APX, and GR activities declined in the initial stages of drought process, elevated significantly with further increasing water deficit progression and recovered after rewatering. These results indicate that: (1) iron SODs-removing superoxide anion is very effective during the whole drought stress; (2) CAT scavenges H(2)O(2) in the early phase of drought and enzymes of ascorbate-glutathione cycle scavenge H(2)O(2) in further increasing drought stress; and (3) POD does not contribute to protect against oxidative damage caused by H(2)O(2) under drought stress.; The aim of this study was to test the protective roles of superoxide dismutases (SODs), guaiacol peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) against oxidative damage and their activities in different phases of the dry down process in Reaumuria soongorica (Pall.) Maxim. leaves. Drought stress was imposed during 100 consecutive days and rewatering after 16, 72, and 100 days. The concentration of hydrogen peroxide (H2O2), malondialdehyde, and SODs activities were elevated significantly with progressing drought stress. POD and CAT activities increased markedly in the early phase of drought and decreased significantly with further drought stress continuation, and POD activity was unable to recover after rewatering. Ascorbate, reduced glutathione, APX, and GR activities declined in the initial stages of drought process, elevated significantly with further increasing water deficit progression and recovered after rewatering. These results indicate that: (1) iron SODs-removing superoxide anion is very effective during the whole drought stress; (2) CAT scavenges H2O2 in the early phase of drought and enzymes of ascorbate-glutathione cycle scavenge H2O2 in further increasing drought stress; and (3) POD does not contribute to protect against oxidative damage caused by H2O2 under drought stress.
关键词	Antioxidant Enzymes Drought Stress Hydrogen Peroxide Reactive Oxygen Species Reaumuria Soongorica
学科领域	Plant Sciences
DOI	10.1007/s12374-009-9053-7
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000269956100007
引用统计	被引频次：30[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/337002/2880
专题	实验海洋生物学重点实验室
作者单位	1.NW A&F Univ, Coll Life Sci, Xian 712100, Peoples R China 2.Lanzhou Univ, Key Lab Arid & Grassland Ecol, Minist Educ, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Bai, Juan,Gong, Chun-Mei,Chen, Kang,et al. Examination of Antioxidative System's Responses in the Different Phases of Drought Stress and During Recovery in Desert Plant Reaumuria soongorica (Pall.) Maxim[J]. JOURNAL OF PLANT BIOLOGY,2009,52(5):417-425.
APA	Bai, Juan,Gong, Chun-Mei,Chen, Kang,Kang, Hong-Mei,&Wang, Gang.(2009).Examination of Antioxidative System's Responses in the Different Phases of Drought Stress and During Recovery in Desert Plant Reaumuria soongorica (Pall.) Maxim.JOURNAL OF PLANT BIOLOGY,52(5),417-425.
MLA	Bai, Juan,et al."Examination of Antioxidative System's Responses in the Different Phases of Drought Stress and During Recovery in Desert Plant Reaumuria soongorica (Pall.) Maxim".JOURNAL OF PLANT BIOLOGY 52.5(2009):417-425.

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