Abstract
Abstract Common beans ( Phaseolus vulgaris L.) have been found not to respond to molybdenum (Mo) when grown on deficient soils that were also very acid (< pH 5.2). Greenhouse and growth chamber experiments in soil and solution culture were done to (i) test whether soil acidity prevents Mo response in bean by interferring with Mo uptake or translocation to nodules; (ii) establish relationships between Mo concentrations in nodules and in other plant parts; and (iii) assess cultivar differences in Mo uptake. In the six cultivars studied, plant Mo concentrations were little influenced by pH in the range 4.8 to 5.8. In more detailed experiments with the cultivar Venezuela 350, neither pH (4.8 to 6.3) nor temperature (21 to 31°C) affected Mo concentration or distribution over a wide range of Mo supply in soil and solution culture. Nodule Mo concentration varied less than shoot Mo in response to varied external supply. It correlated with Mo in stems better than in leaves or roots. Root Mo related closely to external Mo. Leaves appeared to act as sinks for Mo disposal at high Mo levels. One bean cultivar accumulated more Mo in stem and seed than five other cultivars. It was also noted that Mo was 10 times higher in seeds produced at Davis, Calif., (on an Entisol) than at Goiana, Brazil (on an Oxisol). These data confirm that genetic and environmental controls on seed Mo can be manipulated to help control Mo deficiency.
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Claims 9
Claim · model-written summary
Plant Mo concentrations in six cultivars were little influenced by pH 4.8 to 5.8
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarist0 - Material
- six cultivarse1
- Treatment
- pH in the range 4.8 to 5.8e1
- Outcome
- plant Mo concentrationse1
- Direction
- little influencede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e1“In the six cultivars studied, plant Mo concentrations were little influenced by pH in the range 4.8 to 5.8”
Claim · model-written summary
Neither pH nor temperature affected Mo concentration or distribution in cultivar Venezuela 350 (no change)
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Material
- Venezuela 350e3
- Treatment
- pH (4.8 to 6.3)e2
- Outcome
- Mo concentration or distributione2
- Direction
- no_changeinferrede2
- Qualifier
- temperature (21 to 31°C)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e2“neither pH (4.8 to 6.3) nor temperature (21 to 31°C) affected Mo concentration or distribution over a wide range of Mo supply in soil and solution culture”
e3“In more detailed experiments with the cultivar Venezuela 350”
Claim · model-written summary
Nodule Mo concentration varied less than shoot Mo in response to external Mo supply
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- Nodulee3
- Treatment
- external supplye3
- Outcome
- Nodule Mo concentratione3
- Direction
- varied lesse3
- Comparator
- shoot Moe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e3“Nodule Mo concentration varied less than shoot Mo in response to varied external supply”
Claim · model-written summary
Nodule Mo correlated better with stem Mo than with leaf or root Mo
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- stemse4
- Outcome
- Mo in stemse4
- Comparator
- leaves or rootse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e3“Nodule Mo concentration varied less than shoot Mo in response to varied external supply”
e4“It correlated with Mo in stems better than in leaves or roots”
Claim · model-written summary
Root Mo was closely related to external Mo supply
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- external Moe5
- Outcome
- Root Moe5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e5“Root Mo related closely to external Mo”
Claim · model-written summary
Leaves appear to act as sinks for Mo disposal at high Mo levels (author interpretation)
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- Leavese6
- Treatment
- high Mo levelse6
- Outcome
- Mo disposale6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e6“Leaves appeared to act as sinks for Mo disposal at high Mo levels”
Claim · model-written summary
One bean cultivar accumulated more Mo in stem and seed than five other cultivars
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Material
- One bean cultivare7
- Outcome
- Mo in stem and seede7
- Direction
- moree7
- Comparator
- five other cultivarse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e7“One bean cultivar accumulated more Mo in stem and seed than five other cultivars”
Claim · model-written summary
Seed Mo was 10 times higher in plants grown at Davis, Calif. than at Goiana, Brazil
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- seedse1
- Outcome
- Moe1
- Direction
- highere1
- Value
- 10 timese1
- Comparator
- Goiana, Brazile1
- Setting
- Davis, Calif.e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e1“It was also noted that Mo was 10 times higher in seeds produced at Davis, Calif., (on an Entisol) than at Goiana, Brazil (on an Oxisol)”
Claim · model-written summary
Genetic and environmental controls on seed Mo can be manipulated to help control Mo deficiency (authors recommendation)
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Outcome
- control Mo deficiencye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Phaseolus vulgaris L. to Molybdenum Under Acid Conditions”
e1“These data confirm that genetic and environmental controls on seed Mo can be manipulated to help control Mo deficiency”
The same questions in other papers
ph · nutrient: content · Phaseolus vulgaris (common bean)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.