Abstract
The tropical-grown crops common bean (Phaseolus vulgaris), mung bean (Vigna radiate), cowpea (Vigna unguiculata), pearl millet (Pennisetum glaucum), finger millet (Eleusine coracana), amaranth (Amaranthus hypochonriacus), sorghum (Sorghum bicolour) and wheat (Triticum aestivum) were exposed to different concentrations of the air pollutant ozone in experimental Solardome facilities. The plants were exposed to ozone treatments for between one and four months, depending on the species. There was a large decrease in yield of protein-rich beans and cowpeas with increasing ozone exposure, partly attributable to a reduction in individual bean/pea weight. Size of individual grains was also reduced with increasing ozone for African varieties of wheat. In contrast, the yield of amaranth, pearl millet and finger millet (all C4 species) was not sensitive to increasing ozone concentrations and there was some evidence of an increase in weight of individual seedheads with increasing ozone for finger millet. Sorghum did not reach yield, but was not sensitive to ozone based on changes in biomass. Dose-response relationships for these crop species demonstrate that tropospheric ozone pollution could reduce yield of important crops, particularly legumes, in tropical regions such as sub-Saharan Africa.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Yield of beans and cowpeas decreased strongly with increasing ozone exposure.
Not reportedComparator
Verbatim
e0“There was a large decrease in yield of protein-rich beans and cowpeas with increasing ozone exposure”
Claim · model-written summary
Individual bean/pea weight was reduced under increasing ozone exposure, partly explaining the yield decrease.
Verbatim
e1“partly attributable to a reduction in individual bean/pea weight”
e0“There was a large decrease in yield of protein-rich beans and cowpeas with increasing ozone exposure”
Claim · model-written summary
Size of individual wheat grains was reduced with increasing ozone in African wheat varieties.
- Taxon
- wheat
Triticum aestivume2 - Material
- African varietiese2
- Treatment
- increasing ozonee2
- Outcome
- Size of individual grainse2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Size of individual grains was also reduced with increasing ozone for African varieties of wheat”
Claim · model-written summary
Amaranth yield was not sensitive to increasing ozone concentrations.
- Taxon
- amaranth
.JPG?width=60)
Amaranthus caudatuse3 - Treatment
- increasing ozone concentrationse3
- Outcome
- yielde3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e3“the yield of amaranth, pearl millet and finger millet (all C4 species) was not sensitive to increasing ozone concentrations”
Claim · model-written summary
Pearl millet yield was not sensitive to increasing ozone concentrations.
- Taxon
- pearl millet
Cenchrus americanuse3 - Treatment
- increasing ozone concentrationse3
- Outcome
- yielde3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the yield of amaranth, pearl millet and finger millet (all C4 species) was not sensitive to increasing ozone concentrations”
Claim · model-written summary
Finger millet yield was not sensitive to increasing ozone concentrations.
- Taxon
- finger millet
Eleusine coracanae3 - Treatment
- increasing ozone concentrationse3
- Outcome
- yielde3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the yield of amaranth, pearl millet and finger millet (all C4 species) was not sensitive to increasing ozone concentrations”
Claim · model-written summary
Finger millet seedhead weight tended to increase with increasing ozone.
- Taxon
- finger milletEleusine coracanae4
- Treatment
- increasing ozonee4
- Outcome
- weight of individual seedheadse4
- Direction
- increasee4
- Qualifier
- some evidencee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“there was some evidence of an increase in weight of individual seedheads with increasing ozone for finger millet”
Claim · model-written summary
Sorghum biomass was not sensitive to ozone.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Sorghum did not reach yield, but was not sensitive to ozone based on changes in biomass”
Claim · model-written summary
Sorghum did not reach yield in the experiment.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Sorghum did not reach yield, but was not sensitive to ozone based on changes in biomass”
Claim · model-written summary
Tropospheric ozone could reduce yield of important crops, particularly legumes, in tropical regions such as sub-Saharan Africa.
Verbatim
e6“Dose-response relationships for these crop species demonstrate that tropospheric ozone pollution could reduce yield of important crops, particularly legumes, in tropical regions such as sub-Saharan Africa”
The same questions in other papers
ozone · yield · Phaseolus vulgaris (common bean)Results differ
11 papers in the same direction as this paper
- negative
- no effect
- negative
8 papers more in this group
See all 12 papers →ozone · growth · Triticum aestivum (wheat)Results differ
43 papers in the same direction as this paper · 14 in the opposite direction
- positive
- positive
- positive
54 papers more in this group
See all 58 papers →ozone · yield · Cenchrus americanus (pearl millet)Results agree
1 paper in the same direction as this paper
- no effect
ozone · yield · Eleusine coracana (finger millet)Results agree
1 paper in the same direction as this paper
- no effect
ozone · growth · SorghumResults agree
2 papers in the same direction as this paper
- no effect
- 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.