Abstract
Abstract Purpose This research studies the alleviation potential of N- or/and P- deprived Coccomyxa chodatii SAG 216–2 extracts as biostimulants on mercury stress (10 and 30 mg L −1 ) of wheat seedlings. Materials The study includes the interactive effect of mercury and biostimulants on growth, reactive nitrogen and oxygen species, membrane stability, and antioxidant activity in wheat seedlings. Results The imposed toxic effects of Hg-stress on the studied parameters were to a great extent less noticeable under different algal extracts, and the magnitude of augmentation was P-deprived extract > P-&N-deprived extract > N-deprived extract > Normal algal extract. Higher Hg-tolerance modulated by algal extracts, especially P-deprived extract, was associated with high antioxidant capacity and ferric reducing power. These activities could instigate the antioxidant system (enzymatic and non-enzymatic) under Hg-stress. Furthermore, the algal extracts broadly alleviated wheat chelating mechanism deterioration by Hg-stress via enhancing phytochelatins, reduced glutathione, and metallothioneins. Thus, the applied algal extracts retarded Hg accumulation in wheat tissues exposed to Hg stress. In addition, the nitrosative stress induced by Hg-stress in terms of high nitric oxide content was minimized by various algal extracts. All these regulations by algal extracts are reflected in high membrane stability as denoted by the reduction of lipid peroxidation, lipoxygenase, and methylglyoxal as a sign of reducing oxidative damage and reactive oxygen species (ROS). Conclusion Thus, we recommended using the macronutrient-deprived algal extracts of Coccomyxa chodatii SAG 216–2 as potential biostimulants of wheat growth under Hg-stress and may be under other stresses.
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Claims 8
Claim · model-written summary
Algal extracts alleviated mercury toxicity across studied wheat endpoints.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- different algal extractse0
- Outcome
- toxic effects of Hg-stresse0
- Direction
- less noticeablee0
- Comparator
- Hg-stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“toxic effects of Hg-stress on the studied parameters were to a great extent less noticeable under different algal extracts”
t0“wheat seedlings”
Claim · model-written summary
P-deprived extract showed the greatest augmentation, followed by P and N deprived, N deprived, and normal extract.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- P-deprived extracte0
- Outcome
- magnitude of augmentatione0
- Direction
- >e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“magnitude of augmentation was P-deprived extract > P-&N-deprived extract > N-deprived extract > Normal algal extract”
t0“wheat seedlings”
Claim · model-written summary
Higher mercury tolerance under algal extracts was associated with antioxidant capacity and ferric reducing power.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- algal extractse0
- Outcome
- Hg-tolerancee0
- Direction
- Highere0
- Qualifier
- high antioxidant capacity and ferric reducing powere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher Hg-tolerance modulated by algal extracts, especially P-deprived extract, was associated with high antioxidant capacity and ferric reducing power”
t0“wheat seedlings”
Claim · model-written summary
Algal extracts enhanced wheat phytochelatins, reduced glutathione and metallothioneins under mercury stress.
- Taxon
- wheatTriticum aestivume0
- Treatment
- algal extractse0
- Outcome
- phytochelatins, reduced glutathione, and metallothioneinse0
- Direction
- enhancinge0
- Comparator
- Hg-stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“algal extracts broadly alleviated wheat chelating mechanism deterioration by Hg-stress via enhancing phytochelatins, reduced glutathione, and metallothioneins”
Claim · model-written summary
Algal extracts retarded mercury accumulation in wheat tissues.
- Taxon
- wheatTriticum aestivume0
- Treatment
- algal extractse0
- Outcome
- Hg accumulatione0
- Direction
- retardede0
- Comparator
- Hg stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied algal extracts retarded Hg accumulation in wheat tissues exposed to Hg stress”
Claim · model-written summary
Algal extracts minimized mercury-induced nitric oxide content.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- various algal extractse0
- Outcome
- nitric oxide contente0
- Direction
- minimizede0
- Comparator
- Hg-stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrosative stress induced by Hg-stress in terms of high nitric oxide content was minimized by various algal extracts”
t0“wheat seedlings”
Claim · model-written summary
Algal extracts improved membrane stability with reduced lipid peroxidation, lipoxygenase and methylglyoxal.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- algal extractse0
- Outcome
- lipid peroxidation, lipoxygenase, and methylglyoxale0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“algal extracts are reflected in high membrane stability as denoted by the reduction of lipid peroxidation, lipoxygenase, and methylglyoxal”
t0“wheat seedlings”
Claim · model-written summary
The authors recommend macronutrient deprived algal extracts as wheat biostimulants under mercury stress.
- Taxon
- wheatTriticum aestivume0
- Outcome
- potential biostimulants of wheat growth under Hg-stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recommended using the macronutrient-deprived algal extracts of Coccomyxa chodatii SAG 216–2 as potential biostimulants of wheat growth under Hg-stress”
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