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	A novel aba-hypersensitive mutant in arabidopsis defines a genetic locus that confers tolerance to xerothermic stress
	Yan, Chengshi; Shen, Hui; Li, Qun; He, Zuhua
刊名	Planta
	2006-09-01
卷号	224期号:4页码:889-899
关键词	Arabidopsis thaliana Aba hypersensitivity Genetic mapping Hat1 mutant Hot and dry air tolerance
ISSN号	0032-0935
DOI	10.1007/s00425-006-0272-6
通讯作者	He, zuhua(zhhe@sibs.ac.cn)
英文摘要	Hot and dry air (harmattan or xerothermic climate) greatly inhibits plant growth, particularly flowering and seed setting of crops. little is known about the mechanism of plant response to this extreme environmental stress due to the lack of valuable genetic resource. here, we report the isolation and characteristics of a unique arabidopsis mutant, hat1 (harmattan tolerant 1), which shows high tolerance to hot and dry air. under normal growth conditions, the mutant does not differ in morphology and soil drought tolerance compared to the wild type. when subjected to high temperature (42 degrees c) and low humidity (10-15%), however, it could survive up to 6 days, while the wild type (col-0) died after 24 h. the hat1 mutant also exhibits enhanced tolerance to soil drought, but only under xerothermic conditions. mutant plants tightly close their stomata to retain water under xerothermic stress, and are more tolerant to high salinity at all developmental stages, accumulating less na+ and more k+ than wild-type plants during nacl treatment. interestingly, hat1 plants are also aba-hypersensitive. genetic analysis revealed that the hat1 phenotype is caused by a dominant mutation at a single nuclear locus. mapping studies indicate that hat1 is located at an interval of 168 kb on chromosome 5 in which 21 genes are known to be regulated by diverse abiotic stresses. a mutant of this kind, to our knowledge, has not been previously reported. thus, this report serves as a starting point in the genetic dissection of the plant response to xerothermic stress, and provides physiological and genetic evidence of the existence of a novel abiotic stress response pathway that is also aba-dependent.
WOS关键词	ACID SIGNAL-TRANSDUCTION ; PLANT SALT TOLERANCE ; ABSCISIC-ACID ; HEAT-STRESS ; ANION CHANNELS ; DROUGHT STRESS ; PROTEIN ; PATHWAYS ; THERMOTOLERANCE ; BIOSYNTHESIS
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000240063100015
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2379083
专题	中国科学院大学
通讯作者	He, Zuhua
作者单位	1.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, Natl Lab Plant Mol Genet, Shanghai 200032, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Yan, Chengshi,Shen, Hui,Li, Qun,et al. A novel aba-hypersensitive mutant in arabidopsis defines a genetic locus that confers tolerance to xerothermic stress[J]. Planta,2006,224(4):889-899.
APA	Yan, Chengshi,Shen, Hui,Li, Qun,&He, Zuhua.(2006).A novel aba-hypersensitive mutant in arabidopsis defines a genetic locus that confers tolerance to xerothermic stress.Planta,224(4),889-899.
MLA	Yan, Chengshi,et al."A novel aba-hypersensitive mutant in arabidopsis defines a genetic locus that confers tolerance to xerothermic stress".Planta 224.4(2006):889-899.

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