Abstract
Abstract Experiments were conducted in order to examine the inter-specific difference in low P tolerance in terms of biomass production, photosynthetic rate per unit leaf area (Po) and biological nitrogen fixation (BNF). Three legume species: mashbean (Vigna aconitifolia cv. Mash-88), mungbean (Vigna radiata cv. Moong-6601), and soybean (Glycine max L. cv. Tamahomare) were grown at different levels of P applied in 1993 and 1994. Dry matter production increased in all the species with the increasing P levels. At low P levels up to 25 kg P ha-1 soybean displayed a relatively higher biomass production than mashbean and mungbean, which was mainly caused by the promotion of root growth and leaf area expansion. In low P mashbean plants leaf area development was severely inhibited while Po remained relatively stable in all the species irrespective of the P levels except for extremely low Po at later growth stages without application of P. A positive correlation between the amount of N accumulation and acetylene reduction activity (ARA) was found in all the species (r=0.77*). At low P levels, soybean absorbed a larger P amount than other species and the amount of P absorbed was positively correlated with biomass production (r= 0.99**). At low P levels, the P concentration decreased in all the plant parts and such a decrease was pronounced in the nodules. These results suggest that soybean has a higher tolerance under suboptimal conditions of P supply compared with mashbean and mungbean, mainly due to a higher ability of leaf area expansion and absorption activity of P through expansion of root interception.
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Claims 17
Claim · model-written summary
Dry matter production rose with phosphorus in mashbean.
Not reportedComparator
Verbatim
e0“Dry matter production increased in all the species with the increasing P levels”
t0“mashbean”
Claim · model-written summary
Dry matter production rose with phosphorus in mungbean.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatat0 - Treatment
- increasing P levelse0
- Outcome
- Dry matter productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Dry matter production increased in all the species with the increasing P levels”
t0“mungbean”
Claim · model-written summary
Dry matter production rose with phosphorus in soybean.
- Taxon
- soybean
Glycine maxt0 - Treatment
- increasing P levelse0
- Outcome
- Dry matter productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter production increased in all the species with the increasing P levels”
t0“soybean”
Claim · model-written summary
At up to 25 kg P ha-1, soybean had more biomass than mashbean and mungbean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- low P levels up to 25 kg P ha-1e0
- Outcome
- biomass productione0
- Direction
- highere0
- Comparator
- mashbean and mungbeane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low P levels up to 25 kg P ha-1 soybean displayed a relatively higher biomass production than mashbean and mungbean”
Claim · model-written summary
Enhanced root growth mainly explained soybean biomass advantage under low P.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- roote0
- Outcome
- biomass productione0
- Qualifier
- promotion of root growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low P levels up to 25 kg P ha-1 soybean displayed a relatively higher biomass production than mashbean and mungbean, which was mainly caused by the promotion of root growth and leaf area expansion”
t0“soybean”
Claim · model-written summary
Leaf area expansion also mainly explained soybean biomass advantage under low P.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- leafe0
- Outcome
- biomass productione0
- Qualifier
- leaf area expansione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low P levels up to 25 kg P ha-1 soybean displayed a relatively higher biomass production than mashbean and mungbean, which was mainly caused by the promotion of root growth and leaf area expansion”
t0“soybean”
Claim · model-written summary
Low phosphorus severely inhibited mashbean leaf area development.
Not reportedComparator
Verbatim
e0“In low P mashbean plants leaf area development was severely inhibited”
Claim · model-written summary
Photosynthetic rate per leaf area remained relatively stable across P levels in all species.
Not reportedComparator
Verbatim
e0“Po remained relatively stable in all the species irrespective of the P levels”
t0“mashbean”
Claim · model-written summary
Without P, photosynthetic rate was extremely low at later growth stages.
- Taxon
- mashbeant0
- Organ / stage
- later growth stagese0
- Treatment
- without application of Pe0
- Outcome
- Poe0
- Direction
- lowe0
Not reportedComparator
Verbatim
e0“except for extremely low Po at later growth stages without application of P”
t0“mashbean”
Claim · model-written summary
N accumulation correlated positively with acetylene reduction activity across species.
Verbatim
e0“A positive correlation between the amount of N accumulation and acetylene reduction activity (ARA) was found in all the species (r=0.77*)”
t0“mashbean”
Claim · model-written summary
Soybean absorbed more P than the other species at low P.
- Taxon
- soybeanGlycine maxe0
- Outcome
- P amounte0
- Direction
- largere0
- Qualifier
- low P levelse0
- Comparator
- other speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low P levels, soybean absorbed a larger P amount than other species”
Claim · model-written summary
P absorbed correlated positively with soybean biomass production.
- Taxon
- soybeanGlycine maxt0
- Compound
- Pe0
- Outcome
- biomass productione0
- Direction
- positively correlatede0
- Value
- r= 0.99**e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of P absorbed was positively correlated with biomass production (r= 0.99**)”
t0“soybean”
Claim · model-written summary
At low P, P concentration fell across plant parts.
- Taxon
- mashbeant0
- Organ / stage
- all the plant partse0
- Treatment
- low P levelse0
- Outcome
- P concentratione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“At low P levels, the P concentration decreased in all the plant parts”
t0“mashbean”
Claim · model-written summary
The low-P reduction in P concentration was pronounced in nodules.
Verbatim
e0“such a decrease was pronounced in the nodules”
t0“mashbean”
Claim · model-written summary
Soybean was interpreted as more tolerant of suboptimal P than mashbean and mungbean.
- Taxon
- soybeanGlycine maxe0
- Outcome
- tolerance under suboptimal conditions of P supplye0
- Direction
- highere0
- Comparator
- mashbean and mungbeane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean has a higher tolerance under suboptimal conditions of P supply compared with mashbean and mungbean”
Claim · model-written summary
Soybean tolerance was attributed partly to greater leaf area expansion.
- Taxon
- soybeanGlycine maxt0
- Outcome
- tolerancee0
- Qualifier
- higher ability of leaf area expansione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that soybean has a higher tolerance under suboptimal conditions of P supply compared with mashbean and mungbean, mainly due to a higher ability of leaf area expansion and absorption activity of P through expansion of root interception”
t0“soybean”
Claim · model-written summary
Soybean tolerance was attributed partly to P absorption through root interception.
- Taxon
- soybeanGlycine maxt0
- Outcome
- tolerancee0
- Qualifier
- absorption activity of P through expansion of root interceptione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that soybean has a higher tolerance under suboptimal conditions of P supply compared with mashbean and mungbean, mainly due to a higher ability of leaf area expansion and absorption activity of P through expansion of root interception”
t0“soybean”
The same questions in other papers
phosphorus · yield · Vigna radiata (mung bean)Results differ
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- positive
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302 papers in the same direction as this paper · 42 in the opposite direction · 10 reporting no difference from an alternative
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351 papers more in this group
See all 355 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.