Abstract
Experiments were performed to determine the effects of simulated acid rain on Phaseolus vulgaris L. At p H values below 3, plants exhibited a failure to attain normal height, had necrotic and wrinkled leaves, excessive and adventitious budding, and premature abscission of primary leaves. Histologically, leaves had smaller cells, less intercellular space, and smaller starch granules within the chloroplasts. Respiration rates of the treated plants increased only slightly at low p H values. Apparent rates of photosynthesis, however, increased dramatically. Both carbohydrate production and root biomass were reduced by low p H treatments, and application of Congo red indicator to the acid‐treated leaf tissue showed that the cell contents were acidified to a p H of below 4.0.
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Claims 9
Claim · model-written summary
Below p H 3, treated plants failed to attain normal height.
- Taxon
- Phaseolus vulgaris L.
Phaseolus vulgarise0 - Treatment
- simulated acid raine0
- Outcome
- normal heighte0
- Direction
- failure to attaine0
- Qualifier
- p H values below 3e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of simulated acid rain on Phaseolus vulgaris L. At p H values below 3, plants exhibited a failure to attain normal height”
Claim · model-written summary
Below p H 3, plants had necrotic and wrinkled leaves.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarise0
- Treatment
- simulated acid raine0
- Outcome
- necrotic and wrinkled leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of simulated acid rain on Phaseolus vulgaris L. At p H values below 3, plants exhibited a failure to attain normal height, had necrotic and wrinkled leaves”
Claim · model-written summary
Below p H 3, plants showed excessive and adventitious budding.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarise0
- Treatment
- simulated acid raine0
- Outcome
- excessive and adventitious buddinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of simulated acid rain on Phaseolus vulgaris L. At p H values below 3, plants exhibited a failure to attain normal height, had necrotic and wrinkled leaves, excessive and adventitious budding”
Claim · model-written summary
Below p H 3, plants had premature abscission of primary leaves.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarise0
- Treatment
- simulated acid raine0
- Outcome
- premature abscission of primary leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of simulated acid rain on Phaseolus vulgaris L. At p H values below 3, plants exhibited a failure to attain normal height, had necrotic and wrinkled leaves, excessive and adventitious budding, and premature abscission of primary leaves”
Claim · model-written summary
Acid-treated leaves had smaller cells, less intercellular space and smaller starch granules.
Verbatim
t0“PHASEOLUS VULGARIS L.”
e0“Histologically, leaves had smaller cells, less intercellular space, and smaller starch granules within the chloroplasts”
Claim · model-written summary
Respiration rates increased only slightly at low p H.
Verbatim
t0“PHASEOLUS VULGARIS L.”
e0“Respiration rates of the treated plants increased only slightly at low p H values”
Claim · model-written summary
Apparent photosynthesis rates increased dramatically.
Verbatim
t0“PHASEOLUS VULGARIS L.”
e0“Apparent rates of photosynthesis, however, increased dramatically”
Claim · model-written summary
Low p H reduced carbohydrate production and root biomass.
- Taxon
- PHASEOLUS VULGARIS L.t0
- Treatment
- low p H treatmentse0
- Outcome
- carbohydrate production and root biomasse0
- Direction
- reducede0
Not reportedComparator
Verbatim
t0“PHASEOLUS VULGARIS L.”
e0“Both carbohydrate production and root biomass were reduced by low p H treatments”
Claim · model-written summary
Acid-treated leaf cell contents had p H below 4.0.
Verbatim
t0“PHASEOLUS VULGARIS L.”
e0“acid‐treated leaf tissue showed that the cell contents were acidified to a p H of below 4.0”
The same questions in other papers
rainfall · growth · Phaseolus vulgaris (common bean)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
1 paper more in this group
See all 5 papers →phosphorus · quality: sugar starch · Phaseolus vulgaris (common bean)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.