Abstract
Abstract The effect of supplementary potassium nitrate (KNO3) on growth and yield of bell pepper (Capsicum annum cv. 11B 14) plants grown in containers under high root‐zone salinity was investigated. Treatments were (1) control, soil only and (2) high salt treatment, as for control plus 3.5 g NaCl kg−1 soil. Above treatments were combined with or without either 0.5 or 1 g supplementary KNO3 kg−1 soil. Plants grown at high NaCl had significantly less dry matter, fruit yield, and chlorophyll than those in the control treatment. Supplementing the high salt soil with 0.5 and 1 g KNO3 kg−1 increased plant dry matter, fruit yield, and chlorophyll concentrations as compared to high salt treatment. Membrane permeability increased significantly with high NaCl application, but less so when supplementary KNO3 was applied. High NaCl resulted in plants with very leaky root systems as measured by high K efflux; rate of leakage was reduced by supplementary KNO3. These data suggest that NaCl status affect root membrane integrity. Sodium (Na) concentration in plant tissues increased in leaves and roots in the elevated NaCl treatment as compared to control treatment. Concentrations of K and N in leaves were significantly lower in the high salt treatment than in the control. For the high salt treatment, supplementing the soil with KNO3 at 1 g kg−1 resulted in K and N levels similar to those of the control. These results support the view that supplementary KNO3 can overcome the effects of high salinity on fruit yield and whole plant biomass in pepper plants.
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Claims 9
Claim · model-written summary
High NaCl significantly reduced pepper dry matter, fruit yield and chlorophyll relative to control.
Verbatim
e0“Plants grown at high NaCl had significantly less dry matter, fruit yield, and chlorophyll than those in the control treatment.”
t0“Bell Pepper”
Claim · model-written summary
Supplemental KNO3 increased pepper dry matter, fruit yield and chlorophyll under high salinity.
Verbatim
e0“Supplementing the high salt soil with 0.5 and 1 g KNO3 kg−1 increased plant dry matter, fruit yield, and chlorophyll concentrations as compared to high salt treatment.”
t0“Bell Pepper”
Claim · model-written summary
High NaCl significantly increased pepper membrane permeability.
- Taxon
- bell peppert0
- Treatment
- high NaCl applicatione0
- Outcome
- Membrane permeabilitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Membrane permeability increased significantly with high NaCl application”
t0“Bell Pepper”
Claim · model-written summary
Supplementary KNO3 limited the salt-related increase in pepper membrane permeability.
Verbatim
e0“Membrane permeability increased significantly with high NaCl application, but less so when supplementary KNO3 was applied.”
t0“Bell Pepper”
Claim · model-written summary
High NaCl caused high potassium efflux from pepper roots.
Not reportedComparator
Verbatim
e0“High NaCl resulted in plants with very leaky root systems as measured by high K efflux”
t0“Bell Pepper”
Claim · model-written summary
Supplementary KNO3 reduced pepper-root potassium leakage.
Not reportedComparator
Verbatim
e0“rate of leakage was reduced by supplementary KNO3”
t0“Bell Pepper”
Claim · model-written summary
Elevated NaCl increased sodium concentration in pepper leaves and roots relative to control.
Verbatim
e0“Sodium (Na) concentration in plant tissues increased in leaves and roots in the elevated NaCl treatment as compared to control treatment.”
t0“Bell Pepper”
Claim · model-written summary
High salt significantly lowered pepper leaf potassium and nitrogen concentrations.
Verbatim
e0“Concentrations of K and N in leaves were significantly lower in the high salt treatment than in the control.”
t0“Bell Pepper”
Claim · model-written summary
At 1 g kg−1, supplemental KNO3 restored pepper potassium and nitrogen levels to values similar to control.
Verbatim
e0“For the high salt treatment, supplementing the soil with KNO3 at 1 g kg−1 resulted in K and N levels similar to those of the control.”
t0“Bell Pepper”
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See all 7 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.