Abstract
ABSTRACT Effects of phosphorus (P) deficiency on nodulation were examined in soybean grown in nutrient solution for 7 weeks. Increasing P supply increased shoot growth of nitrogen (N2)-fixing plants from week 5 and that of nitrate-fed plant from week 4 after treatment. Nitrogen (N2)-fixing plants had a greater P requirement for maximum growth at week 5. Increasing P supply from 1 to 16 μ M increased N concentration in N2-fixing plants at week 4 but did not affect it from week 5. By contrast, P deficiency increased N concentration in nitrate-fed plants. Increasing P supply improved nodule formation from week 3. Nodule mass was affected more by P supply than nodule number, which, in turn, was affected more than plant growth. However, P supply did not decrease nodule specific N2 fixation from week 5. The results suggest that P deficiency impaired symbiotic N2 fixation through delaying onset of nodule function and decreasing nodule development.
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Claims 11
Claim · model-written summary
Increasing P supply increased shoot growth of N2-fixing soybean plants from week 5.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Increasing P supplye1
- Outcome
- shoot growthe1
- Direction
- increasede1
- Qualifier
- from week 5e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e1“Increasing P supply increased shoot growth of nitrogen (N2)-fixing plants from week 5 and that of nitrate-fed plant from week 4 after treatment”
Claim · model-written summary
Increasing P supply increased shoot growth of nitrate-fed soybean plants from week 4.
- Taxon
- soybeanGlycine maxe0
- Material
- nitrate-fed plante1
- Treatment
- Increasing P supplye1
- Outcome
- shoot growthe1
- Direction
- increasede1
- Qualifier
- from week 4e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e1“Increasing P supply increased shoot growth of nitrogen (N2)-fixing plants from week 5 and that of nitrate-fed plant from week 4 after treatment”
Claim · model-written summary
N2-fixing soybean plants had a greater P requirement for maximum growth at week 5.
- Taxon
- soybeanGlycine maxe0
- Outcome
- P requirement for maximum growthe2
- Direction
- greatere2
- Qualifier
- at week 5e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e2“Nitrogen (N2)-fixing plants had a greater P requirement for maximum growth at week 5”
Claim · model-written summary
Increasing P supply from 1 to 16 μM increased N concentration in N2-fixing soybean plants at week 4.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Increasing P supply from 1 to 16 μ Me3
- Outcome
- N concentratione3
- Direction
- increasede3
- Qualifier
- at week 4e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e3“Increasing P supply from 1 to 16 μ M increased N concentration in N2-fixing plants at week 4 but did not affect it from week 5”
Claim · model-written summary
Increasing P supply did not affect N concentration in N2-fixing soybean plants from week 5.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Increasing P supplye3
- Outcome
- N concentratione3
- Direction
- did not affecte3
- Qualifier
- from week 5e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e3“Increasing P supply from 1 to 16 μ M increased N concentration in N2-fixing plants at week 4 but did not affect it from week 5”
Claim · model-written summary
P deficiency increased N concentration in nitrate-fed soybean plants.
- Taxon
- soybeanGlycine maxe0
- Material
- nitrate-fed plantse4
- Treatment
- P deficiencye4
- Outcome
- N concentratione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e4“By contrast, P deficiency increased N concentration in nitrate-fed plants”
Claim · model-written summary
Increasing P supply improved nodule formation from week 3.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- nodulee5
- Treatment
- Increasing P supplye5
- Outcome
- nodule formatione5
- Direction
- improvede5
- Qualifier
- from week 3e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e5“Increasing P supply improved nodule formation from week 3”
Claim · model-written summary
Nodule mass was affected more by P supply than nodule number in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- P supplye6
- Outcome
- nodule masse6
- Direction
- affected moree6
- Comparator
- nodule numbere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e6“Nodule mass was affected more by P supply than nodule number, which, in turn, was affected more than plant growth”
Claim · model-written summary
Nodule number was affected more than plant growth in soybean.
- Taxon
- soybeanGlycine maxe0
- Outcome
- nodule numbere6
- Direction
- affected moree6
- Comparator
- plant growthe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e6“Nodule mass was affected more by P supply than nodule number, which, in turn, was affected more than plant growth”
Claim · model-written summary
P supply did not decrease nodule specific N2 fixation from week 5 in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- P supplye7
- Outcome
- nodule specific N2 fixatione7
- Direction
- did not decreasee7
- Qualifier
- from week 5e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e7“However, P supply did not decrease nodule specific N2 fixation from week 5”
Claim · model-written summary
P deficiency impaired symbiotic N2 fixation in soybean by delaying onset of nodule function and decreasing nodule development.
- Taxon
- soybeanGlycine maxe0
- Treatment
- P deficiencye7
- Outcome
- symbiotic N2 fixatione7
- Qualifier
- delaying onset of nodule function and decreasing nodule developmente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined in soybean grown in nutrient solution for 7 weeks”
e7“The results suggest that P deficiency impaired symbiotic N2 fixation through delaying onset of nodule function and decreasing nodule development”
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See all 146 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.