Abstract
Abstract Active phosphate uptake by the roots of young sunflower plants was stimulated nonspecifically by increasing the total salt concentration of the uptake solution. Inhibition of active uptake by DNP‐treatment removed the salt stimulation. Independently of the rate of active uptake the amount of phosphate present in the free space of the roots increased as the salt concentration was raised. It is suggested that at low ionic strength of the nutrient solution the initial passive step of ion transport through the root free space can limit the overall uptake rate.
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Claims 4
Claim · model-written summary
Increasing total salt concentration stimulated active phosphate uptake by young sunflower roots.
- Taxon
- sunflower
Helianthus annuuse0 - Organ / stage
- rootse0
- Treatment
- increasing the total salt concentration of the uptake solutione0
- Outcome
- Active phosphate uptakee0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“Active phosphate uptake by the roots of young sunflower plants was stimulated nonspecifically by increasing the total salt concentration of the uptake solution.”
Claim · model-written summary
DNP treatment removed the salt stimulation of active phosphate uptake.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- DNP‐treatmente0
- Outcome
- salt stimulatione0
- Direction
- removede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“Inhibition of active uptake by DNP‐treatment removed the salt stimulation.”
Claim · model-written summary
Root free-space phosphate increased as solution salt concentration rose, independently of active uptake.
- Taxon
- SunflowerHelianthus annuust0
- Organ / stage
- rootse0
- Treatment
- salt concentration was raisede0
- Outcome
- amount of phosphate present in the free space of the rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“Independently of the rate of active uptake the amount of phosphate present in the free space of the roots increased as the salt concentration was raised.”
Claim · model-written summary
The authors suggest that at low ionic strength passive root free-space ion transport can limit overall uptake.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- overall uptake ratee0
- Direction
- limite0
- Qualifier
- initial passive step of ion transport through the root free spacee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“It is suggested that at low ionic strength of the nutrient solution the initial passive step of ion transport through the root free space can limit the overall uptake rate.”
The same questions in other papers
salinity · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
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See all 8 papers →salinity · nutrient: content · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- negative
8 papers more in this group
See all 12 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.