African Journal of Plant Science
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Article Number - C7E985664756


Vol.11(7), pp. 298-307 , July 2017
DOI: 10.5897/AJPS2017.1552
ISSN: 1996-0824



Full Length Research Paper

The suppression of Arabidopsis succinic semialdehyde dehydrogenase (SSADH) phenotype by using ethyl methane-sulfonate mutagenesis (EMS)



Dereje W. Mekonnen
  • Dereje W. Mekonnen
  • Botanical Institute II, Cologne Biocenter, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany.
  • Google Scholar
Frank Ludewig
  • Frank Ludewig
  • Botanical Institute II, Cologne Biocenter, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany.
  • Google Scholar







 Received: 29 March 2017  Accepted: 12 May 2017  Published: 31 July 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


The disruption of the succinic semialdehyde dehydrogenase (SSADH) function in Arabidopsis leads to aberrant growth phenotype. In human, the SSADH malfunction leads to a condition known as γ-hydroxybutyrate (GHB) aciduria. It is characterized by the accumulation of GHB as well as abnormal growth. GHB aciduria is treated pharmacologically with compounds analogous to gamma-aminubutyrate (GABA). One of these compounds called vagabatrin effectively suppressed the ssadh phenotype in Arabidopsis. Furthermore, the Arabidopsis ssadh phenotype has been suppressed genetically by simultaneous mutation in the POP2 gene. In the present study, the presence of alternative solutions for suppression of the ssadh phenotype was investigated. For that, four ethyl methanesulfonate treated ssadh lines namely 7D, 13J, 17J and 21H were characterized phenotypically and chemotypically. Three- week-old plants of the suppressor lines grew much better than the parent ssadh line and resembled the wild type. The suppressor lines also accumulated reduced amounts of GABA and GHB. PCR based mapping using Sequence Characterized Amplified Region (SCAR) markers located the mutations to chromosome 2 and chromosome 5, suggesting the involvement of at least two mutations in suppression of the ssadh phenotype. Deep whole-genome sequencing of line 17J identified several mutations that induced amino acid change, frame shift and a stop codon. The findings showed that there are more possibilities to suppress the ssadh phenotype; furthermore, it provides an opportunity to identify genes that interact with the GABA shunt.   

Key words: Gamma-aminubutyrate (GABA), shunt; succinic semialdehyde dehydrogenase (SSADH) mapping, Arabidopsis, succinic semialdehyde (SSA), γ-hydroxybutyrate (GHB).

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APA Mekonnen, D. W., & Ludewig, F. (2017). The suppression of Arabidopsis succinic semialdehyde dehydrogenase (SSADH) phenotype by using ethyl methane-sulfonate mutagenesis (EMS). African Journal of Plant Science, 11(7), 298-307.
Chicago Dereje W. Mekonnen, and Frank Ludewig,. "The suppression of Arabidopsis succinic semialdehyde dehydrogenase (SSADH) phenotype by using ethyl methane-sulfonate mutagenesis (EMS)." African Journal of Plant Science 11, no. 7 (2017): 298-307.
MLA Dereje W. Mekonnen, et al. "The suppression of Arabidopsis succinic semialdehyde dehydrogenase (SSADH) phenotype by using ethyl methane-sulfonate mutagenesis (EMS)." African Journal of Plant Science 11.7 (2017): 298-307.
   
DOI 10.5897/AJPS2017.1552
URL http://academicjournals.org/journal/AJPS/article-abstract/C7E985664756

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