Journal Article

FZJ-2019-05144

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Low-glutathione mutants are impaired in growth but do not show an increased sensitivity to moderate water deficit

Bangash, S. A. K. ; Müller-Schüssele, S. J. ; Solbach, D. ; Jansen, M.FZJ* ; Fiorani, F.FZJ* ; Schwarzländer, M. ; Kopriva, S. ; Meyer, A. J. (Corresponding author)

2019
PLOS San Francisco, California, US

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Please use a persistent id in citations: http://hdl.handle.net/2128/23176  doi:10.1371/journal.pone.0220589

Abstract: Glutathione is considered a key metabolite for stress defense and elevated levels have frequently been proposed to positively influence stress tolerance. To investigate whether glutathione affects plant performance and the drought tolerance of plants, wild-type Arabidopsis plants and an allelic series of five mutants (rax1, pad2, cad2, nrc1, and zir1) with reduced glutathione contents between 21 and 63% compared to wild-type glutathione content were phenotypically characterized for their shoot growth under control and water-limiting conditions using a shoot phenotyping platform. Under non-stress conditions the zir1 mutant with only 21% glutathione showed a pronounced dwarf phenotype. All other mutants with intermediate glutathione contents up to 62% in contrast showed consistently slightly smaller shoots than the wild-type. Moderate drought stress imposed through water withdrawal until shoot growth ceased showed that wild-type plants and all mutants responded similarly in terms of chlorophyll fluorescence and growth retardation. These results lead to the conclusion that glutathione is important for general plant performance but that the glutathione content does not affect tolerance to moderate drought conditions typically experienced by crops in the field.

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 582 - Plant Science (POF3-582) (POF3-582)

Appears in the scientific report 2019

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