Abstract
Iron (Fe) deficiency is a common abiotic stress in plants grown in alkaline soil that causes leaf chlorosis and affects root development due to low plant-available Fe concentration. Silicon (Si) is a beneficial element for plant growth and can also improve plant tolerance to abiotic stress. However, the effect of Si and regulatory mechanisms on tomato plant growth under Fe deficiency remain largely unclear. Here, we examined the effect of Si application on the photosynthetic capacity, antioxidant defense, sugar metabolism, and organic acid contents under Fe deficiency in tomato plants. The results showed that Si application promoted plant growth by increasing photosynthetic capacity, strengthening antioxidant defense, and reprogramming sugar metabolism. Transcriptomics analysis (RNA-seq) showed that Si application under Fe deficiency up-regulated the expression of genes related to antioxidant defense, carbohydrate metabolism and organic acid synthesis. In addition, Si application under Fe deficiency increased Fe distribution to leaves and roots. Combined with physiological assessment and molecular analysis, these findings suggest that Si application can effectively increase plant tolerance to low Fe stress and thus can be implicated in agronomic management of Fe deficiency for sustainable crop production. Moreover, these findings provide important information for further exploring the genes and underlying regulatory mechanisms of Si-mediated low Fe stress tolerance in crop plants.
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Claims 9
Claim · model-written summary
Silicon promoted tomato growth under iron deficiency.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Si applicatione0
- Outcome
- plant growthe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application promoted plant growth”
t0“tomato”
Claim · model-written summary
Silicon increased photosynthetic capacity.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- silicont0
- Outcome
- photosynthetic capacitye0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing photosynthetic capacity”
t0“silicon-mediated tolerance to iron deficiency in tomato”
Claim · model-written summary
Silicon strengthened antioxidant defense.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- silicont0
- Outcome
- antioxidant defensee0
- Direction
- strengtheninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strengthening antioxidant defense”
t0“silicon-mediated tolerance to iron deficiency in tomato”
Claim · model-written summary
Silicon reprogrammed sugar metabolism.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- silicont0
- Outcome
- sugar metabolisme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reprogramming sugar metabolism”
t0“silicon-mediated tolerance to iron deficiency in tomato”
Claim · model-written summary
Under iron deficiency, silicon upregulated antioxidant defense genes.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si applicatione0
- Outcome
- expression of genes related to antioxidant defensee0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application under Fe deficiency up-regulated the expression of genes related to antioxidant defense, carbohydrate metabolism and organic acid synthesis”
t0“tomato”
Claim · model-written summary
Under iron deficiency, silicon upregulated carbohydrate metabolism genes.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si applicatione0
- Outcome
- expression of genes related to antioxidant defense, carbohydrate metabolisme0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application under Fe deficiency up-regulated the expression of genes related to antioxidant defense, carbohydrate metabolism and organic acid synthesis”
t0“tomato”
Claim · model-written summary
Under iron deficiency, silicon upregulated organic acid synthesis genes.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si applicatione0
- Outcome
- expression of genes related to antioxidant defense, carbohydrate metabolism and organic acid synthesise0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application under Fe deficiency up-regulated the expression of genes related to antioxidant defense, carbohydrate metabolism and organic acid synthesis”
t0“tomato”
Claim · model-written summary
Under iron deficiency, silicon increased iron distribution to leaves and roots.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si applicatione0
- Outcome
- Fe distribution to leaves and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application under Fe deficiency increased Fe distribution to leaves and roots”
t0“tomato”
Claim · model-written summary
Authors infer silicon can increase tolerance to low iron stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si applicatione0
- Outcome
- plant tolerance to low Fe stresse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application can effectively increase plant tolerance to low Fe stress”
t0“tomato”
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