Bangash, Sajid
[Author];
Solbach, David
[Author];
Jansen, Marcus
[Author];
Fiorani, Fabio
[Author];
Schwarzlaender, Markus
[Author];
Kopriva, Stanislav
[Author];
Meyer, Andreas J.
[Author]
Low-glutathione mutants are impaired in growth but do not show an increased sensitivity to moderate water deficit
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Media type:
E-Book;
Preprint;
Report
Title:
Low-glutathione mutants are impaired in growth but do not show an increased sensitivity to moderate water deficit
Contributor:
Bangash, Sajid
[Author];
Solbach, David
[Author];
Jansen, Marcus
[Author];
Fiorani, Fabio
[Author];
Schwarzlaender, Markus
[Author];
Kopriva, Stanislav
[Author];
Meyer, Andreas J.
[Author]
imprint:
Cold Spring Harbor Laboratory, NY, 2019
Published in:bioRxiv beta (2019). doi:10.1101/710962v1
Language:
English
DOI:
https://doi.org/10.1101/710962v1
Origination:
Footnote:
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Description:
Glutathione is considered a key metabolite for stress defense and elevated levelshave frequently been proposed to positively influence stress tolerance. To investigatewhether 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 towild-type glutathione content were phenotypically characterized for their shoot growthunder control and water-limiting conditions using a shoot phenotyping platform.Under non-stress conditions the zir1 mutant with only 21 % glutathione showed apronounced dwarf phenotype. All other mutants with intermediate glutathionecontents up to 62 % in contrast showed consistently slightly smaller shoots than thewild-type. Moderate drought stress imposed through water withdrawal until shootgrowth ceased showed that wild-type plants and all mutants responded similarly interms of chlorophyll fluorescence and growth retardation. These results lead to theconclusion that glutathione is important for general plant performance but that theglutathione content does not affect tolerance to moderate drought conditions typicallyexperienced by crops in the field.