Abstract
Root‐supplied Si is thought to play a role in alleviating the effects of water‐deficit stress in several crops. However, little information is known about the contribution of Si, especially foliar application, in the biochemical and physiological mechanisms of potato ( Solanum tuberosum L.) under water‐deficit stress. The objective of this study was to evaluate the effects of soil‐ and foliar‐applied soluble Si on Si accumulation, osmotic adjustment, antioxidant defense responses, pigments concentrations, and tuber yield of potato plants grown under water deficit. A greenhouse experiment was conducted using pots containing 35 dm 3 of a Typic Acrortox soil. Treatments included a control (no water‐deficit stress or Si application), water‐deficit stress (–0.060 MPa soil matric potential) without Si application, water‐deficit stress with soil‐applied soluble Si (50 mg dm –3 Si), and water‐deficit stress with foliar‐applied soluble Si (five sprays of 1.425 mM Si water solution). Soil‐applied Si increased concentration and accumulation of Si in all parts of water‐stressed potato plants while foliar‐applied Si increased the Si concentration only in the tuber + roots, compared to the control and water‐deficit treatment. Both soil‐ and foliar‐applied Si increased proline, activity of catalase (CAT), and tuber dry weight and decreased hydrogen peroxide (H 2 O 2 ) concentration in water‐stressed plants. The activity of superoxide dismutase (SOD) was increased only by the foliar application of Si. Water‐stressed plants that received either soil‐ or foliar‐applied Si maintained relative water content, concentrations of chlorophyll a and carotenoids, chlorophyll a/b ratio, and tuber yield similar to well‐watered potato plants.
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Claims 8
Claim · model-written summary
Soil-applied Si increased Si concentration and accumulation in all parts of water-stressed potato plants.
- Taxon
- Solanum tuberosum
Solanum tuberosume0 - Organ / stage
- all partse1
- Treatment
- soluble Si (50 mg dm –3 Si)e4
- Outcome
- concentration and accumulation of Sie1
- Direction
- increasede1
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“increased concentration and accumulation of Si in all parts of water”
e3“Treatments included a control”
e4“soluble Si (50 mg dm –3 Si)”
Claim · model-written summary
Foliar-applied Si increased Si concentration only in tuber and roots of water-stressed potato plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Organ / stage
- tuber + rootse2
- Treatment
- soluble Si (five sprays of 1.425 mM Si water solution)e5
- Outcome
- Si concentratione2
- Direction
- increasede2
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e2“increased the Si concentration only in the tuber + roots”
e3“Treatments included a control”
e5“soluble Si (five sprays of 1.425 mM Si water solution)”
Claim · model-written summary
Soil- and foliar-applied Si increased proline, catalase activity and tuber dry weight in water-stressed plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- Sie1
- Outcome
- proline, activity of catalase (CAT), and tuber dry weighte2
- Direction
- increasede2
- Comparator
- without Si applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“water‐deficit stress (–0.060 MPa soil matric potential) without Si application”
e2“increased proline, activity of catalase (CAT), and tuber dry weight”
Claim · model-written summary
Soil- and foliar-applied Si decreased hydrogen peroxide concentration in water-stressed plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- Sie1
- Outcome
- hydrogen peroxide (H 2 O 2 ) concentratione2
- Direction
- decreasede2
- Comparator
- without Si applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“water‐deficit stress (–0.060 MPa soil matric potential) without Si application”
e2“decreased hydrogen peroxide (H 2 O 2 ) concentration”
Claim · model-written summary
Foliar-applied Si increased superoxide dismutase activity, unlike soil-applied Si.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- foliar application of Sie2
- Outcome
- activity of superoxide dismutase (SOD)e2
- Direction
- increasede2
- Comparator
- without Si applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“water‐deficit stress (–0.060 MPa soil matric potential) without Si application”
e2“The activity of superoxide dismutase (SOD) was increased only by the foliar application of Si”
Claim · model-written summary
Water-stressed plants with Si maintained relative water content similar to well-watered plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- Sie1
- Outcome
- relative water contente1
- Direction
- similare1
- Comparator
- well‐watered potato plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“Water‐stressed plants that received either soil‐ or foliar‐applied Si maintained relative water content, concentrations of chlorophyll a and carotenoids, chlorophyll a/b ratio, and tuber yield similar to well‐watered potato plants”
Claim · model-written summary
Water-stressed plants with Si maintained chlorophyll a and carotenoid concentrations and chlorophyll a/b ratio similar to well-watered plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- Sie1
- Outcome
- concentrations of chlorophyll a and carotenoids, chlorophyll a/b ratioe1
- Direction
- similare1
- Comparator
- well‐watered potato plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“Water‐stressed plants that received either soil‐ or foliar‐applied Si maintained relative water content, concentrations of chlorophyll a and carotenoids, chlorophyll a/b ratio, and tuber yield similar to well‐watered potato plants”
Claim · model-written summary
Water-stressed plants with Si maintained tuber yield similar to well-watered plants.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- Sie1
- Outcome
- tuber yielde1
- Direction
- similare1
- Comparator
- well‐watered potato plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato ( Solanum tuberosum L.)”
e1“Water‐stressed plants that received either soil‐ or foliar‐applied Si maintained relative water content, concentrations of chlorophyll a and carotenoids, chlorophyll a/b ratio, and tuber yield similar to well‐watered potato plants”
The same questions in other papers
silicon atom · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
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- no effect
- positive
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1 paper in the same direction as this paper
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silicon atom · physiology: oxidative · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
- positive
silicon atom · physiology: pigments · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- positive
- positive
silicon atom · physiology: water · Solanum tuberosum (potato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
silicon atom · nutrient: content · Solanum tuberosum (potato)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →silicon atom · yield · Solanum tuberosum (potato)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
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See all 8 papers →application · physiology: antioxidant enzymes · Solanum tuberosum (potato)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
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See all 8 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.