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	The relationship between seasonal changes in anti-oxidative system and freezing tolerance in the leaves of evergreen woody plants of Sabina
	Chen, Y.; Zhang, M.; Chen, T.; Zhang, Y.; An, L.
刊名	SOUTH AFRICAN JOURNAL OF BOTANY
	2006-05-01
卷号	72期号:2页码:272-279
关键词	Sabina anti-oxidative system freezing tolerance seasonal change
ISSN号	0254-6299
DOI	10.1016/j.sajb.2005.09.004
通讯作者	An, L.(yinpch@yahoo.com.cn)
英文摘要	Although the relationships between reactive oxygen species (ROS) and membrane damage, between anti-oxidative enzyme activity and chilling tolerance, and between antioxidant concentration and chilling tolerance are well documented, the mechanisms responsible for survival of evergreen woody Sabina plants to survive temperatures below -30 degrees C are not well understood. In this study, seasonal changes in the activities of the anti-oxidative enzymes superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX), as well as levels of ascorbic acid (ASA), glutathione (GSH), proline (Pro), carotenoids (Car) and lipid peroxidation were examined in the leaves of Sabina przewalskii Kom. and Sabina chinensis (Lin.) Ant. Leaves were sampled at monthly intervals from the summer of 2004 to spring of 2005. Anti-oxidative enzyme activities and antioxidant contents were affected by declining temperatures in the autumn (September to October) and winter (November to January) and increasing temperatures in the spring (February to April). Activities of POD, CAT and APX, as well as contents of ASA, GSH, Car and Pro increased with the decrease in temperature. The highest values were found in the winter. In contrast, the leaf content of thiobarbituric acid-reactive substances (TBARS) increased markedly in the autumn and remained relatively constant during the following winter. In the autumn, presumably in anticipation of acclimation during the winter, leaf freezing tolerance was closely correlated with the activities of anti-oxidative enzymes and contents of antioxidants, indicating that anti-oxidative systems in the leaves played an important role in limiting the production of free radicals to protect membrane integrity. Freezing tolerance in evergreen woody plants of Sabina is correlated with an increased capacity to scavenge or detoxify ROS by the anti-oxidative system. ROS accumulated as part of the cold acclimation response may induce anti-oxidative defence systems for the acquisition of freezing tolerance in the leaves. The results also suggested that a better capacity for anti-oxidative defences in S. przewalskii might account for its greater capacity for freezing tolerance than S. chinensis. (c) 2005 SAAB. Published by Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	SUPEROXIDE-DISMUTASE ; GLUTATHIONE-REDUCTASE ; TRANSGENIC PLANTS ; OXIDATIVE STRESS ; MAIZE SEEDLINGS ; RESISTANCE ; PHOTOINHIBITION ; PROTECTION ; RADICALS ; CATALASE
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000240298800013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555837
专题	寒区旱区环境与工程研究所
通讯作者	An, L.
作者单位	1.Lanzhou Univ, Coll Life Sci, Lanzhou 730000, Peoples R China 2.Lanzhou Jiaotong Univ, Coll Environm & Municipal Engn, Lanzhou 730070, Peoples R China 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 4.Lanzhou Petrochem Chem Technol, Lanzhou 730060, Peoples R China
推荐引用方式 GB/T 7714	Chen, Y.,Zhang, M.,Chen, T.,et al. The relationship between seasonal changes in anti-oxidative system and freezing tolerance in the leaves of evergreen woody plants of Sabina[J]. SOUTH AFRICAN JOURNAL OF BOTANY,2006,72(2):272-279.
APA	Chen, Y.,Zhang, M.,Chen, T.,Zhang, Y.,&An, L..(2006).The relationship between seasonal changes in anti-oxidative system and freezing tolerance in the leaves of evergreen woody plants of Sabina.SOUTH AFRICAN JOURNAL OF BOTANY,72(2),272-279.
MLA	Chen, Y.,et al."The relationship between seasonal changes in anti-oxidative system and freezing tolerance in the leaves of evergreen woody plants of Sabina".SOUTH AFRICAN JOURNAL OF BOTANY 72.2(2006):272-279.

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