Abstract
Abstract In China, iron (Fe) availability is low in most soils but cadmium (Cd) generally exceeds regulatory soil pollution limits. Thus, biofortification of Fe along with mitigation of Cd in edible plant parts is important for human nutrition and health. Carbon dots (CDs) are considered as potential nanomaterials for agricultural applications. Here, Salvia miltiorrhiza ‐derived CDs are an efficient modulator of Fe, manganese (Mn), zinc (Zn), and Cd accumulation in plants. CDs irrigation (1 mg mL −1 , performed every week starting at the jointing stage for 12 weeks) increased Fe content by 18% but mitigated Cd accumulation by 20% in wheat grains. This finding was associated with the Fe 3+ ‐mobilizing properties of CDs from the soil and root cell wall, as well as endocytosis‐dependent internalization in roots. The resulting excess Fe signaling mitigated Cd uptake via inhibiting TaNRAMP5 expression. Foliar spraying of CDs enhanced Fe (44%), Mn (30%), and Zn (19%) content with an unchanged Cd accumulation in wheat grains. This result is attributed to CDs‐enhanced light signaling, which triggered shoot‐to‐root Fe deficiency response. This study not only reveals the molecular mechanism underlying CDs modulation of Fe signaling in plants but also provides useful strategies for concurrent Fe biofortification and Cd mitigation in plant‐based foods.
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Claims 9
Claim · model-written summary
Carbon dot irrigation increased wheat grain iron content by 18%.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- grainse0
- Treatment
- CDs irrigation (1 mg mL −1 , performed every week starting at the jointing stage for 12 weeks)e0
- Outcome
- Fe contente0
- Direction
- increasede0
- Value
- 18%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CDs irrigation (1 mg mL −1 , performed every week starting at the jointing stage for 12 weeks) increased Fe content by 18% but mitigated Cd accumulation by 20% in wheat grains.”
Claim · model-written summary
Carbon dot irrigation reduced wheat grain cadmium accumulation by 20%.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- CDs irrigation (1 mg mL −1 , performed every week starting at the jointing stage for 12 weeks)e0
- Outcome
- Cd accumulatione0
- Direction
- mitigatede0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CDs irrigation (1 mg mL −1 , performed every week starting at the jointing stage for 12 weeks) increased Fe content by 18% but mitigated Cd accumulation by 20% in wheat grains.”
Claim · model-written summary
The authors associate irrigation effects with carbon dot iron mobilization and root internalization.
Not reportedTaxon
Verbatim
e0“This finding was associated with the Fe 3+ ‐mobilizing properties of CDs from the soil and root cell wall, as well as endocytosis‐dependent internalization in roots.”
Claim · model-written summary
Excess iron signaling mitigated cadmium uptake by inhibiting TaNRAMP5 expression.
Not reportedTaxon
Verbatim
e0“The resulting excess Fe signaling mitigated Cd uptake via inhibiting TaNRAMP5 expression.”
Claim · model-written summary
Foliar carbon dot spraying enhanced wheat grain iron content by 44%.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- Foliar spraying of CDse0
- Outcome
- Fee0
- Direction
- enhancede0
- Value
- 44%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of CDs enhanced Fe (44%), Mn (30%), and Zn (19%) content with an unchanged Cd accumulation in wheat grains.”
Claim · model-written summary
Foliar carbon dot spraying enhanced wheat grain manganese content by 30%.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- Foliar spraying of CDse0
- Outcome
- Mne0
- Direction
- enhancede0
- Value
- 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of CDs enhanced Fe (44%), Mn (30%), and Zn (19%) content with an unchanged Cd accumulation in wheat grains.”
Claim · model-written summary
Foliar carbon dot spraying enhanced wheat grain zinc content by 19%.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- Foliar spraying of CDse0
- Outcome
- Zne0
- Direction
- enhancede0
- Value
- 19%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of CDs enhanced Fe (44%), Mn (30%), and Zn (19%) content with an unchanged Cd accumulation in wheat grains.”
Claim · model-written summary
Foliar carbon dot spraying left wheat grain cadmium accumulation unchanged.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- grainse0
- Treatment
- Foliar spraying of CDse0
- Outcome
- Cd accumulatione0
- Direction
- unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of CDs enhanced Fe (44%), Mn (30%), and Zn (19%) content with an unchanged Cd accumulation in wheat grains.”
Claim · model-written summary
The authors attribute foliar effects to enhanced light signaling and a shoot-to-root iron deficiency response.
Not reportedTaxon
Verbatim
e0“This result is attributed to CDs‐enhanced light signaling, which triggered shoot‐to‐root Fe deficiency response.”
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256 papers in the same direction as this paper · 17 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
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See all 275 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.