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	Aluminium-induced inhibition of root elongation in arabidopsis is mediated by ethylene and auxin
	Sun, Pei1,2; Tian, Qiu-Ying1; Chen, Jie1,2; Zhang, Wen-Hao1
刊名	Journal of experimental botany
	2010
卷号	61期号:2页码:347-356
关键词	Aluminium toxicity Arabidopsis thaliana Auxin polar transport Ethylene Root elongation
ISSN号	0022-0957
DOI	10.1093/jxb/erp306
通讯作者	Zhang, wen-hao(whzhang@ibcas.ac.cn)
英文摘要	Aluminium (al) is phytotoxic when solubilized into al(3+) in acidic soils. one of the earliest and distinct symptoms of al(3+) toxicity is inhibition of root elongation. to decipher the mechanism by which al(3+) inhibits root elongation, the role of ethylene and auxin in al(3+)-induced inhibition of root elongation in arabidopsis thaliana was investigated using the wild type and mutants defective in ethylene signalling (etr1-3 and ein2-1) and auxin polar transport (aux1-7 and pin2). exposure of wild-type arabidopsis to alcl(3) led to a marked inhibition of root elongation, and elicited a rapid ethylene evolution and enhanced activity of the ethylene reporter ebs:gus in root apices. root elongation in etr1-3 and ein2-1 mutants was less inhibited by al(3+) than that in wild-type plants. ethylene synthesis inhibitors, co(2+) and aminoethoxyvinylglycine (avg), and an antagonist of ethylene perception (ag(+)) abolished the al(3+)-induced inhibition of root elongation. there was less inhibition of root elongation by al(3+) in aux1-7 and pin2 mutants than in the wild type. the auxin polar transport inhibitor, naphthylphthalamic acid (npa), substantially alleviated the al(3+)-induced inhibition of root elongation. the al(3+) and ethylene synthesis precursor aminocyclopropane carboxylic acid (acc) increased auxin reporter dr5:gus activity in roots. the al(3+)-induced increase in dr5:gus activity was reduced by avg, while the al(3+)-induced increase in ebs:gus activity was not altered by npa. al(3+) and acc increased transcripts of aux1 and pin2, and this effect was no longer observed in the presence of avg and co(2+). these findings indicate that al(3+)-induced ethylene production is likely to act as a signal to alter auxin distribution in roots by disrupting aux1- and pin2-mediated auxin polar transport, leading to arrest of root elongation.
WOS关键词	TRANSITION ZONE ; HIGHER-PLANTS ; CELL ELONGATION ; FAMILY-MEMBERS ; DISTAL PART ; TOXICITY ; TRANSPORT ; GROWTH ; BIOSYNTHESIS ; RESISTANCE
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000273501400004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2415183
专题	中国科学院大学
通讯作者	Zhang, Wen-Hao
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Sun, Pei,Tian, Qiu-Ying,Chen, Jie,et al. Aluminium-induced inhibition of root elongation in arabidopsis is mediated by ethylene and auxin[J]. Journal of experimental botany,2010,61(2):347-356.
APA	Sun, Pei,Tian, Qiu-Ying,Chen, Jie,&Zhang, Wen-Hao.(2010).Aluminium-induced inhibition of root elongation in arabidopsis is mediated by ethylene and auxin.Journal of experimental botany,61(2),347-356.
MLA	Sun, Pei,et al."Aluminium-induced inhibition of root elongation in arabidopsis is mediated by ethylene and auxin".Journal of experimental botany 61.2(2010):347-356.

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