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- Title
A Biostimulant Obtained from the Seaweed Ascophyllum nodosum Protects Arabidopsis thaliana from Severe Oxidative Stress.
- Authors
Omidbakhshfard, Mohammad Amin; Sujeeth, Neerakkal; Gupta, Saurabh; Omranian, Nooshin; Guinan, Kieran J.; Brotman, Yariv; Nikoloski, Zoran; Fernie, Alisdair R.; Mueller-Roeber, Bernd; Gechev, Tsanko S.
- Abstract
Abiotic stresses cause oxidative damage in plants. Here, we demonstrate that foliar application of an extract from the seaweed Ascophyllum nodosum, SuperFifty (SF), largely prevents paraquat (PQ)-induced oxidative stress in Arabidopsis thaliana. While PQ-stressed plants develop necrotic lesions, plants pre-treated with SF (i.e., primed plants) were unaffected by PQ. Transcriptome analysis revealed induction of reactive oxygen species (ROS) marker genes, genes involved in ROS-induced programmed cell death, and autophagy-related genes after PQ treatment. These changes did not occur in PQ-stressed plants primed with SF. In contrast, upregulation of several carbohydrate metabolism genes, growth, and hormone signaling as well as antioxidant-related genes were specific to SF-primed plants. Metabolomic analyses revealed accumulation of the stress-protective metabolite maltose and the tricarboxylic acid cycle intermediates fumarate and malate in SF-primed plants. Lipidome analysis indicated that those lipids associated with oxidative stress-induced cell death and chloroplast degradation, such as triacylglycerols (TAGs), declined upon SF priming. Our study demonstrated that SF confers tolerance to PQ-induced oxidative stress in A. thaliana, an effect achieved by modulating a range of processes at the transcriptomic, metabolic, and lipid levels.
- Subjects
ASCOPHYLLUM nodosum; ARABIDOPSIS thaliana; OXIDATIVE stress; KREBS cycle; APOPTOSIS
- Publication
International Journal of Molecular Sciences, 2020, Vol 21, Issue 2, p1
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms21020474