Abstract
Abstract Bush bean plants (Phaseolus vulgaris L. cv. Improved Tendergreen) were grown in highly calcareous desert soil with high levels of Zn, Ni, and Cd added to them. The purposes were to compare growth and uptake with desert plants grown in the same soil, to assess translocation to fruits, and to measure gas exchange rates. All three trace metals produced toxicity in the highly calcareous soil and the bush beans were less tolerant than previously grown desert plants. The levels used at various points produced 50% or more yield decrease. Zinc and Ni were transported to fruits at concentrations considerably less than in leaves. The transport was greater for Ni than for Zn. Cadmium was not translocated to fruits in detectable quantities. Zinc and nickel supplied in excess restricted Cu movement to fruit. The levels of Zn and Ni had no influence on photosynthesis and transpiration, but the gas exchange rates were decreased by Cd on the dry weight basis.
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Claims 13
Claim · model-written summary
Zinc caused toxicity in bush beans grown in calcareous soil.
Not reportedComparatorDirection
Verbatim
e0“All three trace metals produced toxicity in the highly calcareous soil and the bush beans were less tolerant than previously grown desert plants”
e1“high levels of Zn, Ni, and Cd added to them”
Claim · model-written summary
Nickel caused toxicity in bush beans grown in calcareous soil.
Not reportedComparatorDirection
Verbatim
e0“All three trace metals produced toxicity in the highly calcareous soil and the bush beans were less tolerant than previously grown desert plants”
e1“high levels of Zn, Ni, and Cd added to them”
Claim · model-written summary
Cadmium caused toxicity in bush beans grown in calcareous soil.
Not reportedComparatorDirection
Verbatim
e0“All three trace metals produced toxicity in the highly calcareous soil and the bush beans were less tolerant than previously grown desert plants”
e1“high levels of Zn, Ni, and Cd added to them”
Claim · model-written summary
Bush beans were less tolerant of the metals than previously grown desert plants.
Verbatim
e0“bush beans were less tolerant than previously grown desert plants”
Claim · model-written summary
Some metal concentrations cut bush bean yield by at least half.
- Taxon
- bush beanse1
- Treatment
- levels used at various pointse0
- Outcome
- yielde0
- Direction
- decreasee0
- Value
- 50% or moree0
Not reportedComparator
Verbatim
e0“The levels used at various points produced 50% or more yield decrease”
e1“the bush beans were less tolerant”
Claim · model-written summary
Zinc reached fruit at lower concentrations than leaves.
Verbatim
e0“Zinc and Ni were transported to fruits at concentrations considerably less than in leaves”
e1“the bush beans were less tolerant”
Claim · model-written summary
Nickel reached fruit at lower concentrations than leaves.
Verbatim
e0“Zinc and Ni were transported to fruits at concentrations considerably less than in leaves”
e1“the bush beans were less tolerant”
Claim · model-written summary
Nickel transport to fruit exceeded zinc transport.
Verbatim
e0“The transport was greater for Ni than for Zn”
e1“the bush beans were less tolerant”
Claim · model-written summary
Cadmium was undetectable in fruits.
Verbatim
e0“Cadmium was not translocated to fruits in detectable quantities”
e1“the bush beans were less tolerant”
Claim · model-written summary
Excess zinc restricted copper movement into fruit.
Not reportedComparator
Verbatim
e0“Zinc and nickel supplied in excess restricted Cu movement to fruit”
e1“the bush beans were less tolerant”
Claim · model-written summary
Excess nickel restricted copper movement into fruit.
Not reportedComparator
Verbatim
e0“Zinc and nickel supplied in excess restricted Cu movement to fruit”
e1“the bush beans were less tolerant”
Claim · model-written summary
Zinc and nickel had no reported influence on photosynthesis and transpiration.
- Taxon
- bush beanse1
- Treatment
- Zn and Nie0
- Outcome
- photosynthesis and transpiratione0
- Direction
- no influencee0
Not reportedComparator
Verbatim
e0“The levels of Zn and Ni had no influence on photosynthesis and transpiration”
e1“the bush beans were less tolerant”
Claim · model-written summary
Cadmium decreased gas exchange on a dry-weight basis.
- Taxon
- bush beanse1
- Treatment
- Cde0
- Outcome
- gas exchange ratese0
- Direction
- decreasede0
- Qualifier
- dry weight basise0
Not reportedComparator
Verbatim
e0“the gas exchange rates were decreased by Cd on the dry weight basis”
e1“the bush beans were less tolerant”
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cadmium atom · pest · Phaseolus vulgaris (common bean)Results agree
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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.