Abstract
ABSTRACT Silicon and proline play important physiological, metabolic and functional roles in plants, especially under water deficit conditions. Their application can mitigate the adverse effects of stress in crops by increasing water use efficiency and antioxidant activity. The objective of this study was to evaluate silicon (Si) as attenuator of the effects of water deficit on cowpea cultivars, through physiological, biochemical and growth indicators. The experimental design was randomized blocks with four cultivars (BRS Guariba, BRS Itaim, BRS Aracê and BRS Rouxinol) and four irrigation treatments associated or not with Si application (W100 - 100% ETo; W50 - 50% ETo; W50+100Si and W50+200Si, with 100 and 200 mg L-1 silicon, respectively), in a 4 x 4 factorial scheme, with five replicates. Leaf water potential, proline concentration, antioxidant enzymes and growth indicators were evaluated in cowpea plants. Under water deficit conditions, all cultivars showed reductions in leaf water potentials, which compromised plant growth. However, Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars, besides increasing proline concentration in the former and reducing proline concentration in the latter, which ensured the maintenance of growth. Despite the no contribution to the increase in water potential, Si applications of 100 and 200 mg L-1 in BRS Rouxinol and BRS Aracê, respectively, reduced the deleterious effects of the stress on their growth by regulating the enzymatic metabolism and proline.
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Claims 9
Claim · model-written summary
Under water deficit, all cowpea cultivars had reduced leaf water potential, which compromised growth.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- water deficit conditionse0
- Outcome
- leaf water potentialse0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e0“Under water deficit conditions, all cultivars showed reductions in leaf water potentials, which compromised plant growth”
Claim · model-written summary
Silicon at 200 mg L-1 in BRS Guariba increased leaf water potential under water deficit.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Guaribae1
- Treatment
- Si applications of 200 mg L-1e1
- Outcome
- leaf water potentiale1
- Direction
- increasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
Claim · model-written summary
Silicon at 100 and 200 mg L-1 in BRS Itaim increased leaf water potential under water deficit.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Itaime1
- Treatment
- 100 and 200 mg L-1e1
- Outcome
- leaf water potentiale1
- Direction
- increasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
Claim · model-written summary
Silicon at 200 mg L-1 in BRS Guariba increased ascorbate peroxidase activity.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Guaribae1
- Treatment
- Si applications of 200 mg L-1e1
- Outcome
- the activity of the enzyme ascorbate peroxidasee1
- Direction
- increasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
Claim · model-written summary
Silicon at 100 and 200 mg L-1 in BRS Itaim increased ascorbate peroxidase activity.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Itaime1
- Treatment
- 100 and 200 mg L-1e1
- Outcome
- the activity of the enzyme ascorbate peroxidasee1
- Direction
- increasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
Claim · model-written summary
Silicon in BRS Guariba increased proline concentration.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Guaribae1
- Treatment
- Si applications of 200 mg L-1e1
- Outcome
- proline concentratione2
- Direction
- increasinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
e2“besides increasing proline concentration in the former and reducing proline concentration in the latter, which ensured the maintenance of growth”
Claim · model-written summary
Silicon at 100 and 200 mg L-1 in BRS Itaim reduced proline concentration.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Itaime1
- Treatment
- 100 and 200 mg L-1e1
- Outcome
- proline concentratione2
- Direction
- reducinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e1“Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars”
e2“besides increasing proline concentration in the former and reducing proline concentration in the latter, which ensured the maintenance of growth”
Claim · model-written summary
Silicon at 100 mg L-1 in BRS Rouxinol and 200 mg L-1 in BRS Aracê reduced the deleterious effects of water stress on growth.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Rouxinol and BRS Aracêe3
- Treatment
- Si applications of 100 and 200 mg L-1e3
- Outcome
- the deleterious effects of the stress on their growthe3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e3“Despite the no contribution to the increase in water potential, Si applications of 100 and 200 mg L-1 in BRS Rouxinol and BRS Aracê, respectively, reduced the deleterious effects of the stress on their growth by regulating the enzymatic metabolism and proline”
Claim · model-written summary
Silicon in BRS Rouxinol and BRS Aracê did not increase leaf water potential.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Rouxinol and BRS Aracêe3
- Treatment
- Si applications of 100 and 200 mg L-1e3
- Outcome
- increase in water potentiale3
- Direction
- no contributione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Silicon foliar application attenuates the effects of water suppression on cowpea cultivars”
e3“Despite the no contribution to the increase in water potential, Si applications of 100 and 200 mg L-1 in BRS Rouxinol and BRS Aracê, respectively, reduced the deleterious effects of the stress on their growth by regulating the enzymatic metabolism and proline”
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See all 27 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.