Abstract
Plants of Phaseolus vulgaris L. cv. Pure Gold Wax were grown in controlled environment chambers at six CO 2 concentrations ranging from 340 to 3000 μL L −1 . Data for plant growth analysis were obtained from five harvests from 11 to 55 days after planting. Growth curves were fitted to the data using a cubic spline regression procedure. CO 2 enrichment caused large and rapid increases in leaf dry weight, unit leaf rate, and specific leaf weight. Smaller responses included a decrease in leaf area ratio and an increase in leaf weight ratio. Root dry weight and leaf area were not significantly affected by CO 2 treatments. Relative growth rate was initially higher in CO 2 -enriched plants and later declined; it may not be a suitable index for the evaluation of CO 2 effects during long periods of growth. The results indicate that leaf formation and expansion were not limited by assimilate supply. Maximum growth and pod yield were obtained in plants grown at 1200 μL L −1 CO 2 .
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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 7
Claim · model-written summary
Carbon dioxide enrichment increased leaf dry weight, unit leaf rate, and specific leaf weight.
- Taxon
- bean plantst0
- Treatment
- CO 2 enrichmente0
- Outcome
- leaf dry weight, unit leaf rate, and specific leaf weighte0
- Direction
- increasese0
Not reportedComparator
Verbatim
e0“CO 2 enrichment caused large and rapid increases in leaf dry weight, unit leaf rate, and specific leaf weight”
t0“bean plants”
Claim · model-written summary
Carbon dioxide enrichment decreased leaf area ratio.
Not reportedComparator
Verbatim
e0“CO 2 enrichment”
e1“a decrease in leaf area ratio”
t0“bean plants”
Claim · model-written summary
Carbon dioxide enrichment increased leaf weight ratio.
Not reportedComparator
Verbatim
e0“CO 2 enrichment”
e1“an increase in leaf weight ratio”
t0“bean plants”
Claim · model-written summary
Carbon dioxide treatments did not significantly affect root dry weight or leaf area.
Not reportedComparatorDirection
Verbatim
e0“Root dry weight and leaf area were not significantly affected by CO 2 treatments”
t0“bean plants”
Claim · model-written summary
Relative growth rate was initially higher in carbon dioxide enriched plants but later declined.
Verbatim
e0“Relative growth rate was initially higher in CO 2 -enriched plants and later declined”
t0“bean plants”
Claim · model-written summary
Leaf formation and expansion were interpreted as not limited by assimilate supply.
Verbatim
e0“leaf formation and expansion were not limited by assimilate supply”
t0“bean plants”
Claim · model-written summary
Maximum growth and pod yield occurred at 1200 μL L −1 CO 2.
Verbatim
e0“Maximum growth and pod yield were obtained in plants grown at 1200 μL L −1 CO 2”
t0“bean plants”
The same questions in other papers
co2 · growth · Phaseolus vulgaris (common bean)Positive and negative results
15 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
18 papers more in this group
See all 22 papers →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.