Abstract
Abstract Evidence was gathered to evaluate the effect of salt stress on 15 N absorption rate by plants, to indicate how plant parts (roots and shoots) react to NaCl stress conditions. Nitrogen ( 15 NH 4 ) absorption studies were on cotton ( Gossypium hirsutum L.) grown in complete Hoagland nutrient solution in pots with various NaCl concentrations (0, −0.4, −0.8 and −1.2 MPa osmotic potentials). Low and medium levels of salinity (−0.4 and −0.8 MPa) failed to exhibit a significant effect on the 15 N absorption rate, while high levels of salinity (−1.2 MPa) resulted in substantial reduction of 15 N absorption rate. Concentration of 15 N in plants was significantly higher under moderate salinity stress than in the controls. Absorption rate of water significantly decreased with increasing salinity levels, and was directly proportional to plant growth and total dry matter production. Water uptake rate and plant growth were affected to a greater extent than 15 N absorption rate. The effect of salinity was more pronounced at vegetative than at reproductive stages of growth. Nitrogen concentration was greater in roots than shoots.
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Claims 8
Claim · model-written summary
Low and medium salinity had no significant effect on nitrogen-15 absorption rate.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- Low and medium levels of salinity (−0.4 and −0.8 MPa)e0
- Outcome
- 15 N absorption ratee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low and medium levels of salinity (−0.4 and −0.8 MPa) failed to exhibit a significant effect on the 15 N absorption rate”
t0“Cotton”
Claim · model-written summary
High salinity substantially reduced nitrogen-15 absorption rate.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high levels of salinity (−1.2 MPa)e0
- Outcome
- 15 N absorption ratee0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high levels of salinity (−1.2 MPa) resulted in substantial reduction of 15 N absorption rate”
t0“Cotton”
Claim · model-written summary
Moderate salinity increased plant nitrogen-15 concentration relative to controls.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- moderate salinity stresse0
- Outcome
- Concentration of 15 N in plantse0
- Direction
- highere0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration of 15 N in plants was significantly higher under moderate salinity stress than in the controls”
t0“Cotton”
Claim · model-written summary
Water absorption rate significantly decreased as salinity increased.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increasing salinity levelse0
- Outcome
- Absorption rate of watere0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Absorption rate of water significantly decreased with increasing salinity levels”
t0“Cotton”
Claim · model-written summary
Water absorption rate was directly proportional to plant growth and dry matter production.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Absorption rate of watere0
- Outcome
- plant growth and total dry matter productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Absorption rate of water significantly decreased with increasing salinity levels, and was directly proportional to plant growth and total dry matter production”
t0“Cotton”
Claim · model-written summary
Water uptake and plant growth were affected more than nitrogen-15 absorption.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Water uptake rate and plant growthe0
- Direction
- greater extente0
- Comparator
- 15 N absorption ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water uptake rate and plant growth were affected to a greater extent than 15 N absorption rate”
t0“Cotton”
Claim · model-written summary
Salinity effects were more pronounced at vegetative than reproductive stages.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- vegetativee0
- Outcome
- effect of salinitye0
- Direction
- more pronouncede0
- Comparator
- reproductive stages of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of salinity was more pronounced at vegetative than at reproductive stages of growth”
t0“Cotton”
Claim · model-written summary
Nitrogen concentration was greater in roots than shoots.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- rootse0
- Outcome
- Nitrogen concentratione0
- Direction
- greatere0
- Comparator
- shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen concentration was greater in roots than shoots”
t0“Cotton”
The same questions in other papers
salinity · nutrient: content · Gossypium hirsutum (cotton)Positive and negative results
21 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
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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.