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	Arabidopsis dreb1a confers high salinity tolerance and regulates the expression of ga dioxygenases in tobacco
	Cong, Lin2; Zheng, Hong-Chun2; Zhang, Yu-Xiu1; Chai, Tuan-Yao2
刊名	Plant science
	2008-02-01
卷号	174期号:2页码:156-164
关键词	Atdreb1a High salinity tolerance Tobacco Lea genes Sucrose biosynthesis Ga dioxygenases
ISSN号	0168-9452
DOI	10.1016/j.plantsci.2007.11.002
通讯作者	Zhang, yu-xiu(zhangyuxiu@cuintb.edu.cn)
英文摘要	Atdreb1a driven by the camv 35s or the stress-inducible rd29a promoter were introduced into tobacco plants to investigate the role of atdreb1a in salt stress. the atdreb1a-expressing plants showed higher root length and chlorophyll content, and had elevated levels of soluble sugars under high salinity conditions compared to control plants. the expression of lea (nterd10b and ntlea5) and suc-phosphate-synthase a (ntspsa, which encodes a key enzyme involved in sucrose biosynthesis) increased under salt stress in control plants. moreover, their expression was up-regulated by atdreb1a in transgenic plants under normal conditions and further enhanced by high salt, which at least partially contributed to the high salt tolerance in atdreb1a-expressing plants. on the other hand, overexpression of atdreb1a caused a dwarf phenotype. the expression of ntga3ox and ntga2ox increased while ntga20ox seemed slightly decreased in atdreb1a-overexpressing plants or under salt stress in wild-type tobacco plants. exogenous ga3 treatment did not restore the dwarf phenotype except for the enlarged leaf area and the lengthened petiole. these results suggest that overexpression of atdreb1a confers salt tolerance and regulates the expression of ga dioxygenases in the similar way as salt stress in tobacco plants. the possible mechanism leading to the dwarf phenotype in atdreb1a-overexpressing plants is discussed. (c) 2007 elsevier ireland ltd. all rights reserved.
WOS关键词	BINDING TRANSCRIPTION FACTOR ; FREEZING TOLERANCE ; MOLECULAR-CLONING ; COLD-ACCLIMATION ; STRESS TOLERANCE ; LOW-TEMPERATURE ; GIBBERELLIN 2-OXIDASES ; FUNCTIONAL EXPRESSION ; GENE-EXPRESSION ; HOMEOBOX GENE
WOS研究方向	Biochemistry & Molecular Biology ; Plant Sciences
WOS类目	Biochemistry & Molecular Biology ; Plant Sciences
语种	英语
出版者	ELSEVIER IRELAND LTD
WOS记录号	WOS:000252692600006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2393158
专题	中国科学院大学
通讯作者	Zhang, Yu-Xiu
作者单位	1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Dept Bioengn, Beijing 100083, Peoples R China 2.Grad Univ Chinese Acad Sci, Dept Biol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cong, Lin,Zheng, Hong-Chun,Zhang, Yu-Xiu,et al. Arabidopsis dreb1a confers high salinity tolerance and regulates the expression of ga dioxygenases in tobacco[J]. Plant science,2008,174(2):156-164.
APA	Cong, Lin,Zheng, Hong-Chun,Zhang, Yu-Xiu,&Chai, Tuan-Yao.(2008).Arabidopsis dreb1a confers high salinity tolerance and regulates the expression of ga dioxygenases in tobacco.Plant science,174(2),156-164.
MLA	Cong, Lin,et al."Arabidopsis dreb1a confers high salinity tolerance and regulates the expression of ga dioxygenases in tobacco".Plant science 174.2(2008):156-164.

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