Abstract
The effect of seven rates of molybdenum (Mo) supply on the distribution and redistribution of Mo in Vigna mungo (black gram) cv. Regur on a Mo-deficient sandy loam was examined from flower bud appearance to pod set in one experiment and during pod filling to maturity in another. At the three lowest Mo supply rates, N deficiency symptoms typical of Mo deficiency appeared, and shoot dry matter and shoot nitrogen content were depressed. Increasing Mo supply increased Mo concentrations in all plant parts but the response varied with Mo supply and with plant part. In leaf blades and petioles, Mo concentrations increased slightly when the Mo supply increased from severely deficient to deficient levels but further increases in Mo supply markedly increased the Mo concentrations, particularly in immature and recently matured leaves. In petioles, Mo concentrations generally exceeded those in the blades which they supported at all levels of Mo supply. At Mo rates greater than that required for maximum growth, Mo concentrations in basal stem segments exceeded those in petioles. Molybdenum concentrations in nodules exceeded those in above ground plant parts except at the highest level of Mo supply where the concentrations in basal stem segments exceeded those in nodules. In Mo-adequate plants, Mo contents in the trifoliolate leaves decreased with time suggesting that Mo was readily remobilized. By contrast, in stem segments at all levels of Mo supply, and in trifoliolate leaves in Mo-deficient plants, Mo contents remained constant or increased with time suggesting that Mo was not remobilized in all plant parts or at all levels of Mo supply. Thus, the results suggest that in black gram Mo was variably mobile, being phloem immobile at low Mo supply, but phloem-mobile in all plant parts with the possible exception of stem segments at adequate Mo supply. The relevance of these results for the development of plant tests for Mo deficiency diagnosis is discussed.Copyright 1994, 1999 Academic Press
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Claims 11
Claim · model-written summary
The three lowest molybdenum supply rates produced nitrogen deficiency symptoms.
- Taxon
- Vigna mungo
Vigna mungot0 - Treatment
- three lowest Mo supply ratese0
- Outcome
- N deficiency symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the three lowest Mo supply rates, N deficiency symptoms typical of Mo deficiency appeared”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
The three lowest molybdenum supply rates depressed shoot dry matter and nitrogen content.
- Taxon
- Vigna mungoVigna mungot0
- Treatment
- three lowest Mo supply ratese0
- Outcome
- shoot dry matter and shoot nitrogen contente0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the three lowest Mo supply rates, N deficiency symptoms typical of Mo deficiency appeared, and shoot dry matter and shoot nitrogen content were depressed.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Increasing molybdenum supply raised molybdenum concentrations in all plant parts, with variable response.
- Taxon
- Vigna mungoVigna mungot0
- Treatment
- Increasing Mo supplye0
- Outcome
- Mo concentrationse0
- Direction
- increasede0
- Qualifier
- response varied with Mo supply and with plant parte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing Mo supply increased Mo concentrations in all plant parts but the response varied with Mo supply and with plant part.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
In leaf blades and petioles, molybdenum concentration rose slightly between severely deficient and deficient supply.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- leaf blades and petiolese0
- Treatment
- Mo supply increased from severely deficient to deficient levelse0
- Outcome
- Mo concentrationse0
- Direction
- increased slightlye0
- Comparator
- severely deficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In leaf blades and petioles, Mo concentrations increased slightly when the Mo supply increased from severely deficient to deficient levels”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Further molybdenum supply markedly raised concentrations, especially in immature and recently matured leaves.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- immature and recently matured leavese0
- Treatment
- further increases in Mo supplye0
- Outcome
- Mo concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“further increases in Mo supply markedly increased the Mo concentrations, particularly in immature and recently matured leaves.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Petioles generally contained more molybdenum than their leaf blades at all supply levels.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- petiolese0
- Outcome
- Mo concentrationse0
- Direction
- exceedede0
- Comparator
- bladese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In petioles, Mo concentrations generally exceeded those in the blades which they supported at all levels of Mo supply.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Above the supply needed for maximum growth, basal stems contained more molybdenum than petioles.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- basal stem segmentse0
- Outcome
- Mo concentrationse0
- Direction
- exceedede0
- Qualifier
- Mo rates greater than that required for maximum growthe0
- Comparator
- petiolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Mo rates greater than that required for maximum growth, Mo concentrations in basal stem segments exceeded those in petioles.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Nodules contained more molybdenum than aboveground plant parts except basal stems at the highest supply.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- nodulese0
- Outcome
- Molybdenum concentrationse0
- Direction
- exceedede0
- Qualifier
- except at the highest level of Mo supplye0
- Comparator
- above ground plant partse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Molybdenum concentrations in nodules exceeded those in above ground plant parts except at the highest level of Mo supply where the concentrations in basal stem segments exceeded those in nodules.”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Trifoliolate leaf molybdenum contents decreased over time in adequate plants.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- trifoliolate leavese0
- Outcome
- Mo contentse0
- Direction
- decreasede0
- Qualifier
- Mo-adequate plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Mo-adequate plants, Mo contents in the trifoliolate leaves decreased with time”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
Stem segments at all supplies and leaves under deficiency retained or increased their molybdenum over time.
- Taxon
- Vigna mungoVigna mungot0
- Organ / stage
- stem segmentse0
- Outcome
- Mo contentse0
- Direction
- remained constant or increasede0
- Qualifier
- at all levels of Mo supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in stem segments at all levels of Mo supply, and in trifoliolate leaves in Mo-deficient plants, Mo contents remained constant or increased with time”
t0“Black Gram (Vigna mungo L. Hepper)”
Claim · model-written summary
The authors infer that molybdenum mobility is supply dependent, with phloem immobility at low supply.
- Taxon
- Vigna mungoVigna mungot0
- Outcome
- Mo was variably mobilee0
- Qualifier
- phloem immobile at low Mo supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mo was variably mobile, being phloem immobile at low Mo supply, but phloem-mobile in all plant parts with the possible exception of stem segments at adequate Mo supply.”
t0“Black Gram (Vigna mungo L. Hepper)”
The same questions in other papers
molybdenum atom · growth · Vigna mungo (black gram)Positive and negative results
11 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →molybdenum atom · disease · Vigna mungo (black gram)Results agree
1 paper in the same direction as this paper
- negative
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.