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Aluminum-Induced Ethylene Production is Associated with Inhibition of Root Elongation in Lotus japonicus L
- Source :
- Plant and Cell Physiology. 48:1229-1235
- Publication Year :
- 2007
- Publisher :
- Oxford University Press (OUP), 2007.
-
Abstract
- Inhibition of root elongation by toxic aluminum (Al(3+)) occurs rapidly and is one of the most distinct and earliest symptoms of Al toxicity. To elucidate mechanism underlying Al(3+)-induced inhibition of root elongation, we investigated the involvement of ethylene in Al(3+)-induced inhibition of root elongation using the legume model plants Lotus japonicus and Medicago truncatula. Root elongation of L. japonicus and M. truncatula was rapidly inhibited by exposure to AlCl(3). A similar rapid inhibition of root elongation by the ethylene-releasing substance, ethephon, and the ethylene precursor, 1-aminocyclopropane-1-carboxylic acid (ACC), was also observed. The Al(3+)-induced inhibition of root elongation was substantially ameliorated in the presence of antagonists of ethylene biosynthesis [Co(2+) and aminoethoxyvinylglycine (AVG)]. Al(3+) increased the activity of ACC oxidase (ACO), and induced a rapid evolution of ethylene from root apices and expression of genes of ACC synthase (ACS) and ACO. These findings suggest that induction of ethylene evolution resulting from up-regulation of ACS and ACO plays a critical role in Al(3+)-induced inhibition of root elongation.
- Subjects :
- Time Factors
Ethylene
Physiology
Lotus japonicus
Lyases
Plant Science
Biology
Plant Roots
chemistry.chemical_compound
Chlorides
Gene Expression Regulation, Plant
Ethylene biosynthesis
Medicago truncatula
Botany
Aluminum Chloride
Aluminum Compounds
Legume
Reverse Transcriptase Polymerase Chain Reaction
fungi
Cell Biology
General Medicine
Ethylenes
biology.organism_classification
Molecular biology
chemistry
Toxicity
Lotus
Amino Acid Oxidoreductases
Elongation
Ethephon
Subjects
Details
- ISSN :
- 14719053 and 00320781
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Plant and Cell Physiology
- Accession number :
- edsair.doi.dedup.....a240fd2f9e26d0e322fb87b6be860b7f