Abstract
ABSTRACT Nanomaterials have been increasingly applied to mitigate cadmium (Cd) stress in rice plants. However, whether foliar-applied nanomaterials can rapidly alleviate Cd toxicity within a shorter timeframe (e.g., < 1 week) remains unclear. In this research, a hydroponic experiment involving rice plants was carried out, which consisted of control (CK), Cd stress, and Cd stress together with leaf application of polyacrylic acid coated Mn 3 O 4 nanoparticles (Cd+PMO) treatments. Cd stress increased plant Cd concentration, reduced leaf photosynthesis and increased membrane lipid peroxidation, while Cd+PMO treatment (after application of PMO for 3 days) had no significant impact on plant Cd concentration but enhanced leaf photosynthetic rate by 71.1% and reduced membrane lipid peroxidation by 32.3% versus Cd treatment, respectively. Enhancement in leaf photosynthesis under Cd+PMO treatment relative to Cd stress was resulted from the improved mesophyll conductance and leaf biochemical capacity. Furthermore, the alleviated oxidative stress triggered by PMO under Cd stress resulted from the improvements in both enzymatic and non-enzymatic antioxidant systems. Importantly, our findings further indicate that glucosyltransferase and glutathione S-transferase have crucial roles in the rice tolerance to Cd stress, which is worthy of further study. Our present results should deepen our understandings of PMO effects on Cd tolerance of rice plants, and also providing a possible approach to rapidly reconstruct the crop performance in Cd-contaminated soils through leaf application of Mn 3 O 4 nanoparticles, which is independent of plant Cd concentration.
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Claims 9
Claim · model-written summary
Cadmium stress increased plant cadmium concentration.
- Taxon
- rice plants
Oryza sativat0 - Treatment
- Cd stresse0
- Outcome
- plant Cd concentratione0
- Direction
- increasede0
- Comparator
- control (CK)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress increased plant Cd concentration, reduced leaf photosynthesis and increased membrane lipid peroxidation”
t0“rice plants”
e1“which consisted of control (CK), Cd stress, and Cd stress together with leaf application of polyacrylic acid coated Mn 3 O 4 nanoparticles (Cd+PMO) treatments”
Claim · model-written summary
Cadmium stress reduced leaf photosynthesis.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd stresse0
- Outcome
- leaf photosynthesise0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress increased plant Cd concentration, reduced leaf photosynthesis and increased membrane lipid peroxidation”
t0“rice plants”
Claim · model-written summary
Cadmium stress increased membrane lipid peroxidation.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd stresse0
- Outcome
- membrane lipid peroxidatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress increased plant Cd concentration, reduced leaf photosynthesis and increased membrane lipid peroxidation”
t0“rice plants”
Claim · model-written summary
PMO did not significantly affect plant Cd concentration versus Cd stress.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd+PMO treatmente0
- Outcome
- plant Cd concentratione0
- Direction
- no significant impacte0
- Comparator
- Cd treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd+PMO treatment (after application of PMO for 3 days) had no significant impact on plant Cd concentration but enhanced leaf photosynthetic rate by 71.1% and reduced membrane lipid peroxidation by 32.3% versus Cd treatment”
t0“rice plants”
Claim · model-written summary
PMO enhanced leaf photosynthetic rate by 71.1%.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd+PMO treatmente0
- Outcome
- leaf photosynthetic ratee0
- Direction
- enhancede0
- Value
- 71.1%e0
- Comparator
- Cd treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd+PMO treatment (after application of PMO for 3 days) had no significant impact on plant Cd concentration but enhanced leaf photosynthetic rate by 71.1% and reduced membrane lipid peroxidation by 32.3% versus Cd treatment”
t0“rice plants”
Claim · model-written summary
PMO reduced membrane lipid peroxidation by 32.3%.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd+PMO treatmente0
- Outcome
- membrane lipid peroxidatione0
- Direction
- reducede0
- Value
- 32.3%e0
- Comparator
- Cd treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd+PMO treatment (after application of PMO for 3 days) had no significant impact on plant Cd concentration but enhanced leaf photosynthetic rate by 71.1% and reduced membrane lipid peroxidation by 32.3% versus Cd treatment”
t0“rice plants”
Claim · model-written summary
Improved mesophyll conductance and biochemical capacity explained the photosynthesis gain.
- Taxon
- rice plantsOryza sativat0
- Treatment
- Cd+PMO treatmente0
- Outcome
- leaf photosynthesise0
- Qualifier
- improved mesophyll conductance and leaf biochemical capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhancement in leaf photosynthesis under Cd+PMO treatment relative to Cd stress was resulted from the improved mesophyll conductance and leaf biochemical capacity.”
t0“rice plants”
Claim · model-written summary
Antioxidant system improvements explained alleviated oxidative stress.
- Taxon
- rice plantsOryza sativat0
- Treatment
- PMOe0
- Outcome
- oxidative stresse0
- Qualifier
- improvements in both enzymatic and non-enzymatic antioxidant systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the alleviated oxidative stress triggered by PMO under Cd stress resulted from the improvements in both enzymatic and non-enzymatic antioxidant systems”
t0“rice plants”
Claim · model-written summary
Glucosyltransferase and glutathione S-transferase were implicated in Cd tolerance.
- Taxon
- riceOryza sativae0
- Gene
- glucosyltransferase and glutathione S-transferasee0
- Outcome
- rice tolerance to Cd stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glucosyltransferase and glutathione S-transferase have crucial roles in the rice tolerance to Cd stress”
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See all 26 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.