Abstract
Summary When cowpea plants were grown in large pots under simulated tropical conditions, and were dependent on either symbiotic fixation or inorganic N for their total nitrogen requirements, short periods of waterlogging had adverse effects on vegetative growth and seed production. The effects of waterlogging were more acute as plants experienced stress at progressively earlier stages of development. In plants depending either on biologically fixed N or inorganic N, waterlogging before flowering reduced vegetative growth by about 50%. Although some compensation in vegetative growth occurred during the reproductive development of nodulated plants, seed yields in both cases were still 48% less than in unstressed plants. Depending on the stage of plant development, treatment effects were mediated largely through changes in branch, peduncle and flower production and/or abortion, which contributed directly to variations in the number of pods retained to maturity. Inorganic nitrogen stimulated vegetative growth but did not significantly improve seed yield compared with effectively nodulated plants.
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Claims 9
Claim · model-written summary
Short periods of waterlogging adversely affected cowpea vegetative growth under simulated tropical conditions.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- short periods of waterlogginge0
- Outcome
- vegetative growthe0
- Direction
- adverse effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short periods of waterlogging had adverse effects on vegetative growth and seed production”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Short periods of waterlogging adversely affected cowpea seed production under simulated tropical conditions.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- short periods of waterlogginge0
- Outcome
- seed productione0
- Direction
- adverse effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short periods of waterlogging had adverse effects on vegetative growth and seed production”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Waterlogging effects on cowpea were more acute when stress occurred earlier in development.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- earlier stages of developmente0
- Treatment
- waterlogginge0
- Outcome
- effects of waterlogginge0
- Direction
- more acutee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of waterlogging were more acute as plants experienced stress at progressively earlier stages of development.”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Waterlogging before flowering reduced cowpea vegetative growth by about 50% in plants dependent on either fixed or inorganic nitrogen.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- waterlogging before floweringe0
- Outcome
- vegetative growthe0
- Direction
- reducede0
- Value
- about 50%e0
- Qualifier
- either on biologically fixed N or inorganic Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In plants depending either on biologically fixed N or inorganic N, waterlogging before flowering reduced vegetative growth by about 50%.”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Nodulated cowpea plants showed some compensatory vegetative growth during reproductive development after waterlogging.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- reproductive developmente0
- Outcome
- compensation in vegetative growthe0
- Qualifier
- nodulated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some compensation in vegetative growth occurred during the reproductive development of nodulated plants”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Seed yield after waterlogging was 48% lower than in unstressed cowpea plants under both nitrogen sources.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- waterlogginge1
- Outcome
- seed yieldse0
- Direction
- less thane0
- Value
- 48%e0
- Qualifier
- both casese0
- Comparator
- unstressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yields in both cases were still 48% less than in unstressed plants”
e1“short periods of waterlogging had adverse effects on vegetative growth and seed production”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Depending on developmental stage, waterlogging altered cowpea branch, peduncle, and flower production or abortion, contributing to the number of pods retained at maturity.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- stage of plant developmente0
- Outcome
- number of pods retained to maturitye0
- Qualifier
- changes in branch, peduncle and flower production and/or abortione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depending on the stage of plant development, treatment effects were mediated largely through changes in branch, peduncle and flower production and/or abortion, which contributed directly to variations in the number of pods retained to maturity.”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Inorganic nitrogen stimulated cowpea vegetative growth compared with effectively nodulated plants.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Inorganic nitrogene0
- Outcome
- vegetative growthe0
- Direction
- stimulatede0
- Comparator
- effectively nodulated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inorganic nitrogen stimulated vegetative growth but did not significantly improve seed yield compared with effectively nodulated plants.”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Inorganic nitrogen did not significantly improve cowpea seed yield over effectively nodulated plants.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Inorganic nitrogene0
- Outcome
- seed yielde0
- Direction
- did not significantly improvee0
- Comparator
- effectively nodulated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inorganic nitrogen stimulated vegetative growth but did not significantly improve seed yield compared with effectively nodulated plants.”
t0“cowpea (Vigna unguiculata)”
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See all 45 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.