Abstract
Bush bean plants ( Phaseolus vulgaris L. cv. Contender) were treated once a week for six weeks with simulated acid mist at five pH levels ranging from 5.5 to 2.0. Leaf injury developed on plants exposed to acid concentrations below pH 3 and many leaves developed a flecking symptom similar to that caused by ozone. An adaxial, interveinal bleached area resembling SO 2 injury also developed on some trifoliate leaves at the low pH treatments. Microscopic observation of injured trifoliates indicated that the palisade cells were plasmolyzed and that the chloroplasts lost structural integrity. Reductions in plant weight and chlorophyll content were detected across the pH gradient. Seed and pod growth were reduced at some intermediate acid depositions even though no visible foliar injury developed. Foliar losses of nitrogen, calcium, magnesium and phosphorous increased with decreases in acid mist pH, whereas foliar potassium concentrations were unaffected by acid mist treatment.
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Claims 12
Claim · model-written summary
Acid mist below pH 3 caused leaf injury.
Not reportedComparatorDirection
Verbatim
e0“Leaf injury developed on plants exposed to acid concentrations below pH 3”
t0“BUSH BEAN”
Claim · model-written summary
Many leaves developed ozone-like flecking.
Verbatim
e0“many leaves developed a flecking symptom similar to that caused by ozone.”
t0“BUSH BEAN”
Claim · model-written summary
Low pH treatment produced adaxial interveinal bleaching on some trifoliate leaves.
- Taxon
- BUSH BEANt0
- Organ / stage
- trifoliate leavese0
- Treatment
- low pH treatmentse0
- Outcome
- adaxial, interveinal bleached areae0
Not reportedComparatorDirection
Verbatim
e0“An adaxial, interveinal bleached area resembling SO 2 injury also developed on some trifoliate leaves at the low pH treatments.”
t0“BUSH BEAN”
Claim · model-written summary
Palisade cells in injured trifoliates were plasmolyzed.
Verbatim
e0“palisade cells were plasmolyzed”
e1“injured trifoliates”
t0“BUSH BEAN”
Claim · model-written summary
Chloroplasts in injured trifoliates lost structural integrity.
Verbatim
e0“chloroplasts lost structural integrity”
e1“injured trifoliates”
t0“BUSH BEAN”
Claim · model-written summary
Plant weight declined across the acid mist pH gradient.
Not reportedComparator
Verbatim
e0“Reductions in plant weight and chlorophyll content were detected across the pH gradient.”
e1“simulated acid mist”
t0“BUSH BEAN”
Claim · model-written summary
Chlorophyll content declined across the acid mist pH gradient.
Not reportedComparator
Verbatim
e0“Reductions in plant weight and chlorophyll content were detected across the pH gradient.”
e1“simulated acid mist”
t0“BUSH BEAN”
Claim · model-written summary
Intermediate acid deposition reduced seed growth.
Not reportedComparator
Verbatim
e0“Seed and pod growth were reduced at some intermediate acid depositions even though no visible foliar injury developed.”
t0“BUSH BEAN”
Claim · model-written summary
Intermediate acid deposition reduced pod growth.
Not reportedComparator
Verbatim
e0“Seed and pod growth were reduced at some intermediate acid depositions even though no visible foliar injury developed.”
t0“BUSH BEAN”
Claim · model-written summary
Foliar nitrogen, calcium and magnesium losses increased as acid mist pH decreased.
Verbatim
e0“Foliar losses of nitrogen, calcium, magnesium and phosphorous increased with decreases in acid mist pH”
t0“BUSH BEAN”
Claim · model-written summary
Foliar phosphorus losses increased as acid mist pH decreased.
Verbatim
e0“Foliar losses of nitrogen, calcium, magnesium and phosphorous increased with decreases in acid mist pH”
t0“BUSH BEAN”
Claim · model-written summary
Foliar potassium concentrations were unaffected by acid mist.
- Taxon
- BUSH BEANt0
- Treatment
- acid mist treatmente0
- Outcome
- foliar potassium concentrationse0
- Direction
- unaffectede0
Not reportedComparator
Verbatim
e0“foliar potassium concentrations were unaffected by acid mist treatment.”
t0“BUSH BEAN”
The same questions in other papers
ph · crop injury · Phaseolus vulgaris (common bean)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.