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“dry weight decrease”

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paper W2124624265 ✕

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.

Taxon: lettuceLactuca sativae0
Organ / stage: leavese0
Treatment: Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3)e0
Outcome: dry weight gaine0
Direction: stimulatede0
Value: 39% to 75%e0
Comparator: plants at 16 mmol m-3 CO2 (350 mm3 dm-3)e0

Verbatim

e0
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e1
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Taxon: lettuceLactuca sativae2
Treatment: Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3)e4
Outcome: leaf, stem and root dry weight or RGRe0
Direction: no effecte0
Qualifier: after 8 d of treatmente0
Comparator: plants grown at 69 mmol m-3 CO2e0

Verbatim

e0
“had no effect on leaf, stem and root dry weight or RGR relative to plants grown at 69 mmol m-3 CO2 after 8 d of treatment.”
✓ located verbatim in the source · abstract, characters 879–1001

e1
“had no effect on leaf, stem and root dry weight or RGR relative to plants grown at 69 mmol m-3 CO2 after 8 d of treatment.”
✓ located verbatim in the source · abstract, characters 879–1001

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.

Taxon: lettuceLactuca sativae2
Treatment: Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3)e4
Outcome: specific leaf weight, NAR and Pne0
Direction: decreasede0

Not reportedComparator

Verbatim

e0
“decreased specific leaf weight, NAR and Pn”
✓ located verbatim in the source · abstract, characters 832–874

e1
“decreased specific leaf weight, NAR and Pn”
✓ located verbatim in the source · abstract, characters 832–874

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

High PPF decreased leaf area ratio.

Taxon: lettuceLactuca sativae2
Treatment: high PPF of 880-900 micromoles m-2 s-1e3
Outcome: leaf area ratio (LAR)e0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 572–661

e1
“but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 572–661

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.

Taxon: lettuceLactuca sativae0
Organ / stage: leavese0
Treatment: Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3)e0
Outcome: freshe0
Direction: stimulatede0
Value: 39% to 75%e0
Qualifier: moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1e0
Comparator: plants at 16 mmol m-3 CO2 (350 mm3 dm-3)e0

Verbatim

e0
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e1
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.

Taxon: lettuceLactuca sativae2
Treatment: high PPF of 880-900 micromoles m-2 s-1e0
Outcome: growth, RGR, net assimilation rate (NAR)e0
Direction: increasese0
Qualifier: at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2e0

Not reportedComparator

Verbatim

e0
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e1
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.

Taxon: lettuceLactuca sativae2
Treatment: Elevating CO2 above 46 mmol m-3e0
Outcome: benefite0
Direction: no further benefite0

Not reportedComparator

Verbatim

e0
“Elevating CO2 above 46 mmol m-3 at moderate PPF had no further benefit.”
✓ located verbatim in the source · abstract, characters 342–413

e1
“Elevating CO2 above 46 mmol m-3 at moderate PPF had no further benefit.”
✓ located verbatim in the source · abstract, characters 342–413

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Relative growth rate increased only in the first days of exponential growth.

Taxon: lettuceLactuca sativae2
Outcome: Relative growth rate (RGR)e0
Direction: stimulatede0
Qualifier: only during the first several days of exponential growthe0

Verbatim

e0
“Relative growth rate (RGR) was stimulated only during the first several days of exponential growth.”
✓ located verbatim in the source · abstract, characters 242–341

e1
“Relative growth rate (RGR) was stimulated only during the first several days of exponential growth.”
✓ located verbatim in the source · abstract, characters 242–341

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

High PPF increased photosynthetic rate at enriched CO2.

Taxon: lettuceLactuca sativae2
Treatment: high PPF of 880-900 micromoles m-2 s-1e0
Outcome: photosynthetic rate (Pn)e0
Direction: increasese0

Not reportedComparator

Verbatim

e0
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn)”
✓ located verbatim in the source · abstract, characters 423–570

e1
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn)”
✓ located verbatim in the source · abstract, characters 423–570

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect At high PPF, supraoptimal CO2 increased leaf area and LAR.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

At high PPF, supraoptimal CO2 increased leaf area and LAR.

Taxon: lettuceLactuca sativae2
Treatment: Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3)e0
Outcome: leaf area and LARe0
Direction: increasede0

Not reportedComparator

Verbatim

e0
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

e1
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

t0
“Effects of CO2and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green”
✓ located verbatim in the source · title, characters 0–120

e2
“Enrichment of CO2 to 46 mmol m-3 (1000 mm3 dm-3) at a moderate photosynthetic photon flux (PPF) of 450 micromoles m-2 s-1 stimulated fresh and dry weight gain of lettuce leaves 39% to 75% relative to plants at 16 mmol m-3 CO2 (350 mm3 dm-3).”
✓ located verbatim in the source · abstract, characters 0–241

e3
“high PPF of 880-900 micromoles m-2 s-1 gave further, substantial increases in growth, RGR, net assimilation rate (NAR) and photosynthetic rate (Pn), but a decrease in leaf area ratio (LAR), at 46 or 69 mmol m-3 (1000 or 1500 mm3 dm-3) CO2”
✓ located verbatim in the source · abstract, characters 423–661

e4
“Enrichment of CO2 to a supraoptimal level of 92 mmol m-3 (2000 mm3 dm-3) at high PPF increased leaf area and LAR”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of CO₂and Photosynthetic Photon Flux on Yield, Gas Exchange and Growth Rate ofLactuca SativaL. ‘Waldmann’s Green'

SHARON L. KNIGHT; CARY A. MITCHELL Journal of Experimental Botany 1988. doi:10.1093/jxb/39.3.317

Other claims from this paper (9)

Intervention effect CO2 enrichment increased lettuce leaf fresh weight gain by 39–75% at moderate PPF.
Intervention effect CO2 enrichment increased lettuce leaf dry weight gain by 39–75% at moderate PPF.
Observation Relative growth rate increased only in the first days of exponential growth.
Intervention effect CO2 above 46 mmol m−3 gave no further growth benefit at moderate PPF.
Intervention effect High PPF increased growth, RGR and NAR at 46 or 69 mmol m−3 CO2.
Intervention effect High PPF increased photosynthetic rate at enriched CO2.
Intervention effect High PPF decreased leaf area ratio.
Intervention effect Supraoptimal CO2 decreased specific leaf weight, NAR and Pn.
Intervention effect Supraoptimal CO2 had no effect on organ dry weights or RGR compared with 69 mmol m−3 CO2.

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“dry weight decrease”

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