Abstract
Abiotic stress caused by drought impairs plant growth and reduces yields. This study aimed to investigate the impact of silica nanoparticles (SiO2 NPs) through the adverse effects of drought on the growth, oxidative stress, and antioxidative response of pea ‘Respect’. Pea plants were grown in a greenhouse before being watered (100 ± 1 mL per pot) or foliar sprayed (ca. 14 ± 0.5 mL plant−1) with suspensions containing SiO2 NPs (0, 12.5 ppm, 25 ppm, and 50 ppm) and were exposed to drought stress for 10 days. Drought stress was created by maintaining 30% of the soil moisture while the control was 80%. The growth parameters of pea grown under drought stress conditions were improved by spraying or watering plants with SiO2 NPs (12.5, 25, and 50 ppm). At drought stress, peas treated with SiO2 NPs (50 ppm) increased their relative water content by 29%, specific leaf area by 17%, and decreased root/shoot ratio by 4% as compared to plant non-treated with SiO2 NPs. In addition, spraying or watering of SiO2 NPs increased peas tolerance to drought by increasing the activity of antioxidant enzymes at least three times including catalase, ascorbate peroxidase, glutathione reductase, and superoxide dismutase, as well as reducing hydrogen peroxide and lipid peroxidation in plant tissue. It was observed the increase in total phenolic compounds and non-enzymatic antioxidant activity (DPPH, ABTS, FRAP) in peas treated with SiO2 NPs under drought stress. The physiological response of peas to drought and the effects of SiO2 NPs studied in this experiment based on the use of the concentration of 50 ppm nanoparticles can protect peas from the damaging effects of drought and could help reduce global food shortages.
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Claims 7
Claim · model-written summary
Spraying or watering with silica nanoparticles improved growth under drought.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- spraying or watering plants with SiO2 NPs (12.5, 25, and 50 ppm)e0
- Outcome
- growth parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth parameters of pea grown under drought stress conditions were improved by spraying or watering plants with SiO2 NPs (12.5, 25, and 50 ppm)”
Claim · model-written summary
At 50 ppm, silica nanoparticles raised relative water content by 29% under drought.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- SiO2 NPs (50 ppm)e0
- Outcome
- relative water contente0
- Direction
- increasede0
- Value
- 29%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peas treated with SiO2 NPs (50 ppm) increased their relative water content by 29%”
Claim · model-written summary
At 50 ppm, silica nanoparticles raised specific leaf area by 17% under drought.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- SiO2 NPs (50 ppm)e0
- Outcome
- specific leaf areae0
- Direction
- increasede0
- Value
- 17%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SiO2 NPs (50 ppm) increased their relative water content by 29%, specific leaf area by 17%”
t0“Green Pea (Pisum sativum L.)”
Claim · model-written summary
At 50 ppm, silica nanoparticles lowered root/shoot ratio by 4% under drought.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- SiO2 NPs (50 ppm)e1
- Outcome
- root/shoot ratioe0
- Direction
- decreasede0
- Value
- 4%e0
- Comparator
- plant non-treated with SiO2 NPse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased root/shoot ratio by 4% as compared to plant non-treated with SiO2 NPs”
t0“Green Pea (Pisum sativum L.)”
e1“peas treated with SiO2 NPs (50 ppm)”
Claim · model-written summary
Silica nanoparticle application increased antioxidant enzyme activities at least threefold.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- spraying or watering of SiO2 NPse0
- Outcome
- activity of antioxidant enzymese0
- Direction
- increasinge0
- Value
- at least three timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying or watering of SiO2 NPs increased peas tolerance to drought by increasing the activity of antioxidant enzymes at least three times including catalase, ascorbate peroxidase, glutathione reductase, and superoxide dismutase”
Claim · model-written summary
Silica nanoparticle treatment reduced hydrogen peroxide and lipid peroxidation in pea tissue.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- spraying or watering of SiO2 NPse0
- Outcome
- hydrogen peroxide and lipid peroxidatione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying or watering of SiO2 NPs increased peas tolerance to drought by increasing the activity of antioxidant enzymes at least three times including catalase, ascorbate peroxidase, glutathione reductase, and superoxide dismutase, as well as reducing hydrogen peroxide and lipid peroxidation in plant tissue”
Claim · model-written summary
Silica nanoparticles increased total phenolics and nonenzymatic antioxidant activity under drought.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- SiO2 NPse0
- Outcome
- total phenolic compounds and non-enzymatic antioxidant activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in total phenolic compounds and non-enzymatic antioxidant activity (DPPH, ABTS, FRAP) in peas treated with SiO2 NPs under drought stress”
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See all 66 papers →8 of 12 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.