Abstract
Abstract The investigation concerns the influence of potassium on the transpiration rate of Triticum aestivum and Pisum sativum grown in nutrient solutions. Plants with high amounts of potassium were found to have the lowest transpiration rates. Shoot/root ratio, stomatal frequency, and stomatal aperture were correlated with the potassium concentration in the leaves. In Triticum no correlations with leaf concentration of Na were evident. Short term experiments were carried out in order to investigate the effects on the transpiration rate of a sudden increase in potassium concentration in the nutrient solution. An addition of potassium chloride to potassium deficient wheat plants resulted in a decrease in the transpiration rate of up to 50% within two hours. Comparative tests with sodium chloride resulted in a decrease in transpiration rate of the same magnitude, indicating that the short‐time reaction is not specific to potassium. The experiments show that the transpiration rate can be regulated by varied potassium and sodium concentrations. The observed effect is supposed to be due to changes in the stomatal aperture.
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Claims 6
Claim · model-written summary
Plants with high potassium amounts had the lowest transpiration rates.
- Taxon
- Triticum aestivum
Triticum aestivumt0 - Treatment
- high amounts of potassiume1
- Outcome
- transpiration ratese1
- Direction
- loweste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e1“Plants with high amounts of potassium were found to have the lowest transpiration rates”
Claim · model-written summary
Shoot/root ratio, stomatal frequency and stomatal aperture were correlated with leaf potassium concentration.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Compound
- potassiume2
- Outcome
- Shoot/root ratio, stomatal frequency, and stomatal aperturee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e2“Shoot/root ratio, stomatal frequency, and stomatal aperture were correlated with the potassium concentration in the leaves”
Claim · model-written summary
In Triticum, no correlation was evident between transpiration and leaf sodium concentration.
TriticumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e3“In Triticum no correlations with leaf concentration of Na were evident”
Claim · model-written summary
Adding potassium chloride to potassium-deficient wheat decreased transpiration rate by up to 50% within two hours.
- Taxon
- wheatTriticum aestivume4
- Treatment
- addition of potassium chloridee4
- Outcome
- transpiration ratee4
- Direction
- decreasee4
- Value
- up to 50%e4
- Qualifier
- within two hourse4
- Comparator
- potassium deficient wheat plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e4“An addition of potassium chloride to potassium deficient wheat plants resulted in a decrease in the transpiration rate of up to 50% within two hours”
Claim · model-written summary
Adding sodium chloride decreased transpiration rate by the same magnitude as potassium chloride, indicating the short-term response is not specific to potassium.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- sodium chloridee5
- Outcome
- transpiration ratee5
- Direction
- decreasee5
- Value
- of the same magnitudee5
- Comparator
- potassium chloridee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e4“An addition of potassium chloride to potassium deficient wheat plants resulted in a decrease in the transpiration rate of up to 50% within two hours”
e5“Comparative tests with sodium chloride resulted in a decrease in transpiration rate of the same magnitude”
Claim · model-written summary
The observed transpiration effect is supposed to be due to changes in stomatal aperture.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Outcome
- observed effecte6
- Qualifier
- changes in the stomatal aperturee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum”
e6“The observed effect is supposed to be due to changes in the stomatal aperture”