Abstract
Abstract To examine the factor controlling the low P tolerance in the case of biological nitrogen fixation (BNF) and photosynthetic activity (Po), nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control) and dry matter weight, leaf area, leaf number, Po, and acetylene reduction activity (ARA) were determined at the vegetative and flowering stages. At low P, the relative whole plant dry weight was reduced to more than 50% which was more significant in early and medium maturity groups than late maturity one. Low P application led to an increase in the dry matter distribution into roots in all the cultivars. Low P conditions decreased both leaf number and average leaf area, and those reductions were more pronounced in early maturity cultivars, which resulted in a greater reduction of photosynthesis on a whole plant basis than BNF at both growth stages. However, Po remained relatively stable at both P levels regardless of the maturity groups. The P content was significantly decreased in leaf blades and stem + petioles of all the cultivars. Nodules and roots showed a relatively higher P content than other plant parts, suggesting that under suboptimal P conditions, underground parts acquire P preferentially. Under the low P application conditions, all the cultivars absorbed less than 50% of P amount relative to the respective control plants. Low P application conditions resulted in more than 50% reduction in N accumulation than in the control. It is, therefore, suggested that the early and medium cultivars are more susceptible to low P conditions in terms of biomass production than late maturity ones because of the larger reduction in photosynthesis due to the inhibition of leaf emergence and development than BNF.
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Claims 12
Claim · model-written summary
Low P reduced relative whole-plant dry weight by more than 50% in mashbean cultivars grown in field experiments.
- Taxon
- Vigna aconitifolia
Vigna aconitifoliat0 - Material
- nine mashbean cultivarse0
- Treatment
- low Pe0
- Outcome
- relative whole plant dry weighte1
- Direction
- reducede1
- Value
- more than 50%e1
- Comparator
- 100 kg P ha-1 (control)e0
- Setting
- field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e0“nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control)”
e1“At low P, the relative whole plant dry weight was reduced to more than 50%”
Claim · model-written summary
The dry weight reduction under low P was more significant in early and medium maturity groups than in late maturity cultivars.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- low Pe2
- Outcome
- relative whole plant dry weighte2
- Direction
- more significante2
- Comparator
- late maturity onee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e2“At low P, the relative whole plant dry weight was reduced to more than 50% which was more significant in early and medium maturity groups than late maturity one”
Claim · model-written summary
Low P decreased leaf number and average leaf area in mashbean, with larger reductions in early maturity cultivars.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- Low P conditionse3
- Outcome
- leaf number and average leaf areae3
- Direction
- decreasede3
- Qualifier
- more pronounced in early maturity cultivarse3
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e0“nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control)”
e3“Low P conditions decreased both leaf number and average leaf area, and those reductions were more pronounced in early maturity cultivars”
Claim · model-written summary
Low P caused a greater reduction of whole-plant photosynthesis than of biological nitrogen fixation at both growth stages.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- low Pe1
- Outcome
- photosynthesis on a whole plant basise4
- Direction
- greater reductione4
- Qualifier
- at both growth stagese4
- Comparator
- BNFe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e1“At low P, the relative whole plant dry weight was reduced to more than 50%”
e4“resulted in a greater reduction of photosynthesis on a whole plant basis than BNF at both growth stages”
Claim · model-written summary
Photosynthetic activity (Po) remained relatively stable at both P levels in mashbean regardless of maturity group.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- two P levelse0
- Outcome
- Poe5
- Direction
- remained relatively stablee5
- Qualifier
- regardless of the maturity groupse5
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e0“nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control)”
e5“However, Po remained relatively stable at both P levels regardless of the maturity groups”
Claim · model-written summary
Low P significantly decreased P content in leaf blades and stem plus petioles of all mashbean cultivars.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Organ / stage
- leaf blades and stem + petiolese6
- Treatment
- low Pe0
- Outcome
- P contente6
- Direction
- decreasede6
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e0“nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control)”
e6“The P content was significantly decreased in leaf blades and stem + petioles of all the cultivars”
Claim · model-written summary
Under low P, mashbean cultivars absorbed less than 50% of the P amount relative to control plants.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- low P application conditionse7
- Outcome
- P amounte7
- Direction
- absorbed lesse7
- Value
- less than 50%e7
- Comparator
- respective control plantse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e7“Under the low P application conditions, all the cultivars absorbed less than 50% of P amount relative to the respective control plants”
Claim · model-written summary
Low P caused more than 50% reduction in N accumulation compared with the control in mashbean.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- Low P application conditionse2
- Outcome
- N accumulatione2
- Direction
- reductione2
- Value
- more than 50%e2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e2“Low P application conditions resulted in more than 50% reduction in N accumulation than in the control”
Claim · model-written summary
Nodules and roots had a relatively higher P content than other plant parts under suboptimal P.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Organ / stage
- Nodules and rootse3
- Outcome
- P contente3
- Direction
- highere3
- Comparator
- other plant partse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e3“Nodules and roots showed a relatively higher P content than other plant parts”
Claim · model-written summary
Underground parts are suggested to acquire P preferentially under suboptimal P conditions.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Organ / stage
- underground partse4
- Outcome
- acquire P preferentiallye4
- Qualifier
- under suboptimal P conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e4“suggesting that under suboptimal P conditions, underground parts acquire P preferentially”
Claim · model-written summary
Low P application increased the dry matter distribution into roots in all mashbean cultivars.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Organ / stage
- rootse5
- Treatment
- Low P applicatione5
- Outcome
- dry matter distribution into rootse5
- Direction
- increasee5
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e0“nine mashbean cultivars (three for each of early, medium, and late maturity groups) were selected for field experiments under two P levels of 10 kg P ha-1 (low P) and 100 kg P ha-1 (control)”
e5“Low P application led to an increase in the dry matter distribution into roots in all the cultivars”
Claim · model-written summary
Early and medium mashbean cultivars are suggested to be more susceptible to low P in biomass production than late maturity cultivars, because of a larger reduction in photosynthesis from inhibited leaf emergence and development.
- Taxon
- Vigna aconitifoliaVigna aconitifoliat0
- Treatment
- low P conditionse6
- Outcome
- biomass productione6
- Qualifier
- because of the larger reduction in photosynthesis due to the inhibition of leaf emergence and development than BNFe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mashbean ( Vigna aconitifolia ) cultivars under low P conditions”
e6“It is, therefore, suggested that the early and medium cultivars are more susceptible to low P conditions in terms of biomass production than late maturity ones because of the larger reduction in photosynthesis due to the inhibition of leaf emergence and development than BNF”
The same questions in other papers
phosphorus · growth · Vigna aconitifolia (moth-bean)Positive and negative results
1 in the opposite direction
- positive
phosphorus · nutrient: content · Vigna aconitifolia (moth-bean)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.