Abstract
Soil cadmium (Cd) pollution significantly reduces both the yield and quality of pakchoi, posing potential health risks to consumers. This study aims to investigate the mechanism by which silicon (Si) mitigates Cd accumulation and enhances the yield and quality of pakchoi. The growth of pakchoi was inhibited when treated with 25 μmol L −1 CdCl 2 ; however, the application of 1 mmol L −1 Na 2 SiO 3 significantly alleviated the inhibitory effects of Cd. Transcriptomic and physiological experiments demonstrated that Si application reduced Cd content in the roots and shoots by 39.96% and 61.59%, respectively, by modulating the expression of genes involved in Cd absorption and transport. Following Si application, the activities of catalase and ascorbate peroxidase increased by 2.79-fold and 2.01-fold. This enhancement in antioxidant capacity contributed to improved Cd tolerance. After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively. This enhancement in nutrient composition markedly improves the overall nutritional quality of pakchoi. These results indicate that Si application is an effective method to alleviate Cd stress in crops, providing a viable approach to enhance food safety in Cd-polluted areas. • Si alleviated Cd toxicity and improved the yield and quality of pakchoi under Cd stress. • Si inhibited the absorption of Cd and decreased the accumulation of Cd in the roots and shoots. • Si improved the activity of antioxidant enzymes, reduced the accumulation of ROS. • Si alleviated Cd-induced chlorophyll degradation and promoted photosynthesis. • Si decreased the nitrate content, increased beneficial nutrients content in pakchoi.
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Claims 20
Claim · model-written summary
Cadmium treatment inhibited pakchoi growth.
Not reportedComparator
Verbatim
e0“The growth of pakchoi was inhibited when treated with 25 μmol L −1 CdCl 2”
Claim · model-written summary
Silicon application significantly alleviated cadmium growth inhibition.
Verbatim
e0“the application of 1 mmol L −1 Na 2 SiO 3 significantly alleviated the inhibitory effects of Cd”
t0“pakchoi”
Claim · model-written summary
Silicon reduced cadmium content in pakchoi roots by 39.96%.
- Taxon
- pakchoit0
- Organ / stage
- rootse0
- Treatment
- Si applicatione0
- Outcome
- Cd contente0
- Direction
- reducede0
- Value
- 39.96%e0
Not reportedComparator
Verbatim
e0“Si application reduced Cd content in the roots and shoots by 39.96% and 61.59%, respectively, by modulating the expression of genes involved in Cd absorption and transport”
t0“pakchoi”
Claim · model-written summary
Silicon reduced cadmium content in pakchoi shoots by 61.59%.
- Taxon
- pakchoit0
- Organ / stage
- shootse0
- Treatment
- Si applicatione0
- Outcome
- Cd contente0
- Direction
- reducede0
- Value
- 61.59%e0
Not reportedComparator
Verbatim
e0“Si application reduced Cd content in the roots and shoots by 39.96% and 61.59%, respectively, by modulating the expression of genes involved in Cd absorption and transport”
t0“pakchoi”
Claim · model-written summary
Silicon modulated expression of genes involved in cadmium absorption and transport.
Verbatim
e0“Si application reduced Cd content in the roots and shoots by 39.96% and 61.59%, respectively, by modulating the expression of genes involved in Cd absorption and transport”
t0“pakchoi”
Claim · model-written summary
Silicon increased catalase activity 2.79-fold.
- Taxon
- pakchoit0
- Treatment
- Si applicatione0
- Gene
- catalasee0
- Outcome
- activities of catalasee0
- Direction
- increasede0
- Value
- 2.79-folde0
Not reportedComparator
Verbatim
e0“Following Si application, the activities of catalase and ascorbate peroxidase increased by 2.79-fold and 2.01-fold”
t0“pakchoi”
Claim · model-written summary
Silicon increased ascorbate peroxidase activity 2.01-fold.
- Taxon
- pakchoit0
- Treatment
- Si applicatione0
- Gene
- ascorbate peroxidasee0
- Outcome
- ascorbate peroxidasee0
- Direction
- increasede0
- Value
- 2.01-folde0
Not reportedComparator
Verbatim
e0“Following Si application, the activities of catalase and ascorbate peroxidase increased by 2.79-fold and 2.01-fold”
t0“pakchoi”
Claim · model-written summary
Enhanced antioxidant capacity contributed to cadmium tolerance.
Verbatim
e0“This enhancement in antioxidant capacity contributed to improved Cd tolerance”
t0“pakchoi”
Claim · model-written summary
Silicon reduced leaf nitrate content by 66.14%.
- Taxon
- pakchoie0
- Organ / stage
- leavese0
- Treatment
- Si treatmente0
- Outcome
- nitrate contente0
- Direction
- decreasede0
- Value
- 66.14%e0
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%”
Claim · model-written summary
Silicon increased vitamin C by 89.90%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Silicon increased glucosinolates by 43.90%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Silicon increased carotenoids by 111.16%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Silicon increased calcium by 14.73%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Silicon increased iron by 51.46%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Silicon increased zinc by 82.91%.
Not reportedComparator
Verbatim
e0“After Si treatment, the nitrate content in pakchoi leaves decreased by 66.14%. In contrast, the levels of vitamin C, glucosinolates, carotenoids, calcium, iron and zinc increased by 89.90%, 43.90%, 111.16%, 14.73%, 51.46% and 82.91% respectively”
t0“pakchoi”
Claim · model-written summary
Improved nutrient composition increased pakchoi nutritional quality.
Verbatim
e0“This enhancement in nutrient composition markedly improves the overall nutritional quality of pakchoi”
Claim · model-written summary
Silicon reduced ROS accumulation.
Not reportedComparator
Verbatim
e0“Si improved the activity of antioxidant enzymes, reduced the accumulation of ROS”
t0“pakchoi”
Claim · model-written summary
Silicon alleviated Cd-induced chlorophyll degradation.
Not reportedComparator
Verbatim
e0“Si alleviated Cd-induced chlorophyll degradation and promoted photosynthesis”
t0“pakchoi”
Claim · model-written summary
Silicon promoted photosynthesis.
Not reportedComparator
Verbatim
e0“Si alleviated Cd-induced chlorophyll degradation and promoted photosynthesis”
t0“pakchoi”
Claim · model-written summary
Silicon application is proposed to alleviate cadmium stress and enhance food safety.
Verbatim
e0“Si application is an effective method to alleviate Cd stress in crops, providing a viable approach to enhance food safety in Cd-polluted areas”
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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.