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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erp306
|2 doi
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|a pubmed24n1333.xml
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|a (DE-627)NLM192313320
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|a (NLM)19858117
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Sun, Pei
|e verfasserin
|4 aut
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| 245 |
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|a Aluminium-induced inhibition of root elongation in Arabidopsis is mediated by ethylene and auxin
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 19.03.2010
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|a Date Revised 17.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a 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
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Aluminum Compounds
|2 NLM
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| 650 |
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|a Arabidopsis Proteins
|2 NLM
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| 650 |
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|a Chlorides
|2 NLM
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| 650 |
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|a Ethylenes
|2 NLM
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| 650 |
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7 |
|a Indoleacetic Acids
|2 NLM
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| 650 |
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|a Aluminum Chloride
|2 NLM
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| 650 |
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|a 3CYT62D3GA
|2 NLM
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| 650 |
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|a ethylene
|2 NLM
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| 650 |
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7 |
|a 91GW059KN7
|2 NLM
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| 700 |
1 |
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|a Tian, Qiu-Ying
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Jie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Wen-Hao
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 61(2010), 2 vom: 24., Seite 347-56
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
1 |
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|g volume:61
|g year:2010
|g number:2
|g day:24
|g pages:347-56
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| 856 |
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|u http://dx.doi.org/10.1093/jxb/erp306
|3 Volltext
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