NDLI: Betaine aldehyde dehydrogenase genes from Arabidopsis with different sub-cellular localization affect stress responses

Content Provider	Springer Nature Link
Author	Missihoun, Tagn D. Schmitz, Jessica Klug, Rebecca Kirch, Hans Hubert Bartels, Dorothea
Copyright Year	2010
Abstract	Arabidopsis thaliana belongs to those plants that do not naturally accumulate glycine betaine (GB), although its genome contains two genes, ALDH10A8 and ALDH10A9 that code for betaine aldehyde dehydrogenases (BADHs). BADHs were initially known to catalyze the last step of the biosynthesis of GB in plants. But they can also oxidize metabolism-derived aminoaldehydes to their corresponding amino acids in some cases. This study was carried out to investigate the functional properties of Arabidopsis BADH genes. Here, we have shown that ALDH10A8 and ALDH10A9 proteins are targeted to leucoplasts and peroxisomes, respectively. The expression patterns of ALDH10A8 and ALDH10A9 genes have been analysed under abiotic stress conditions. Both genes are expressed in the plant and weakly induced by ABA, salt, chilling (4°C), methyl viologen and dehydration. The role of the ALDH10A8 gene was analysed using T-DNA insertion mutants. There was no phenotypic difference between wild-type and mutant plants in the absence of stress. But ALDH10A8 seedlings and 4-week-old plants were more sensitive to dehydration and salt stress than wild-type plants. The recombinant ALDH10A9 enzyme was shown to oxidize betaine aldehyde, 4-aminobutyraldehyde and 3-aminopropionaldehyde to their corresponding carboxylic acids. We hypothesize that ALDH10A8 or ALDH10A9 may serve as detoxification enzymes controlling the level of aminoaldehydes, which are produced in cellular metabolism under stress conditions.
Starting Page	369
Ending Page	382
Page Count	14
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	233
Issue Number	2
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-10-30
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Abiotic stress Aminoaldehyde Betaine aldehyde Glycine betaine Leucoplasts Peroxisomes Ecology Forestry Agriculture Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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