Abstract
High Resolution Image Download MS PowerPoint Slide The role of selenium nanoparticles (Se-NPs) in the mitigation of high-temperature (HT) stress in crops is not known. The uptake, toxicity and physiological and biological effects of Se-NPs under HT were investigated in grain sorghum [ Sorghum bicolor (L.) Moench]. Se-NPs of size 10–40 nm were synthesized and characterized to indicate nanocrystalline structure. A toxicity assay showed that Se-NPs concentration inducing 50% cell mortality (TC50) was 275 mg L –1 . Translocation study indicated that Se-NPs can move from root to shoot of sorghum plants. Foliar spray of 10 mg L –1 Se-NPs during the booting stage of sorghum grown under HT stress stimulated the antioxidant defense system by enhancing antioxidant enzymes activity. Furthermore, it decreased the concentration of signature oxidants. Se-NPs facilitated higher levels of unsaturated phospholipids. Se-NPs under HT stress improved the pollen germination percentage, leading to a significantly increased seed yield. The increased antioxidant enzyme activity and decreased content of oxidants in the presence of Se-NPs were greater under HT (38/28 °C) than under optimum temperature conditions (32/22 °C). In conclusion, Se-NPs can protect sorghum plants by enhanced antioxidative defense system under HT stress.
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Claims 9
Claim · model-written summary
Selenium nanoparticles had a TC50 of 275 mg L –1.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se-NPs concentration inducing 50% cell mortality (TC50) was 275 mg L –1”
t0“Sorghum”
Claim · model-written summary
Selenium nanoparticles moved from sorghum root to shoot.
- Outcome
- move from root to shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se-NPs can move from root to shoot of sorghum plants”
t0“Sorghum”
Claim · model-written summary
Foliar selenium nanoparticles increased antioxidant enzyme activity under heat stress.
- Organ / stage
- booting stagee0
- Treatment
- Foliar spray of 10 mg L –1 Se-NPse0
- Outcome
- antioxidant enzymes activitye0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spray of 10 mg L –1 Se-NPs during the booting stage of sorghum grown under HT stress stimulated the antioxidant defense system by enhancing antioxidant enzymes activity”
t0“Sorghum”
Claim · model-written summary
Selenium nanoparticles decreased signature oxidant concentration.
- Treatment
- Selenium Nanoparticle Treatmentt0
- Outcome
- concentration of signature oxidantse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it decreased the concentration of signature oxidants”
t0“High-Temperature Stress Alleviation by Selenium Nanoparticle Treatment in Grain Sorghum”
Claim · model-written summary
Selenium nanoparticles increased unsaturated phospholipid levels.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se-NPs facilitated higher levels of unsaturated phospholipids”
t0“Sorghum”
Claim · model-written summary
Selenium nanoparticles improved pollen germination under heat stress.
- Treatment
- Se-NPse0
- Outcome
- pollen germination percentagee0
- Direction
- improvede0
- Qualifier
- under HT stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se-NPs under HT stress improved the pollen germination percentage”
t0“Sorghum”
Claim · model-written summary
Selenium nanoparticles significantly increased sorghum seed yield under heat stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se-NPs under HT stress improved the pollen germination percentage, leading to a significantly increased seed yield”
t0“Sorghum”
Claim · model-written summary
The selenium nanoparticle-associated enzyme increase was greater under high than optimum temperature.
- Treatment
- HT (38/28 °C)e0
- Outcome
- antioxidant enzyme activitye0
- Direction
- greatere0
- Comparator
- optimum temperature conditions (32/22 °C)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased antioxidant enzyme activity and decreased content of oxidants in the presence of Se-NPs were greater under HT (38/28 °C) than under optimum temperature conditions (32/22 °C)”
t0“Sorghum”
Claim · model-written summary
The selenium nanoparticle-associated oxidant decrease was greater under high than optimum temperature.
- Treatment
- HT (38/28 °C)e0
- Outcome
- content of oxidantse0
- Direction
- decreasede0
- Comparator
- optimum temperature conditions (32/22 °C)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased antioxidant enzyme activity and decreased content of oxidants in the presence of Se-NPs were greater under HT (38/28 °C) than under optimum temperature conditions (32/22 °C)”
t0“Sorghum”
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See all 5 papers →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.