Abstract
Summary Growth and yield components of a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron. CO2 enrichment enhanced tiller and head emergence and increased the number of head-producing tillers and the total dry weight of the plants. Total leaf area, stem height and root/shoot ratio of the plants were greater at high CO 2 concentrations than at low. Net assimilation rate (NAR) increased with increasing CO 2 concentration and decreased with plant size. There was little effect of CO 2 enrichment on leaf weight ratio (LWR) and leaf area ratio (LAR) and no significant effect on specific leaf area (SLA). The weight and number of seeds were significantly higher with increasing CO 2 concentration. The results of this study provide evidence that important changes in plant growth and development may occur during the next century if global CO 2 enrichment continues. Some of these changes would have important ecological impact in natural and managed ecosystems in the future.
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Claims 10
Claim · model-written summary
CO2 enrichment enhanced tiller and head emergence in spring wheat, compared with low CO2.
- Taxon
- spring wheat
Triticum aestivume0 - Material
- GWO 1809e0
- Treatment
- CO2 enrichmente1
- Outcome
- tiller and head emergencee1
- Direction
- enhancede1
- Comparator
- at lowe2
- Setting
- controlled environment chambers of the Duke University Phytotrone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e1“CO2 enrichment enhanced tiller and head emergence and increased the number of head-producing tillers and the total dry weight of the plants”
e2“Total leaf area, stem height and root/shoot ratio of the plants were greater at high CO 2 concentrations than at low”
Claim · model-written summary
CO2 enrichment increased the number of head-producing tillers and the total dry weight of spring wheat, compared with low CO2.
- Taxon
- spring wheatTriticum aestivume0
- Material
- GWO 1809e0
- Treatment
- CO2 enrichmente1
- Outcome
- number of head-producing tillers and the total dry weighte1
- Direction
- increasede1
- Comparator
- at lowe2
- Setting
- controlled environment chambers of the Duke University Phytotrone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e1“CO2 enrichment enhanced tiller and head emergence and increased the number of head-producing tillers and the total dry weight of the plants”
e2“Total leaf area, stem height and root/shoot ratio of the plants were greater at high CO 2 concentrations than at low”
Claim · model-written summary
Total leaf area, stem height and root/shoot ratio of spring wheat were greater at high CO2 concentration than at low.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- high CO 2 concentrationse2
- Outcome
- Total leaf area, stem height and root/shoot ratioe2
- Direction
- greatere2
- Comparator
- at lowe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e2“Total leaf area, stem height and root/shoot ratio of the plants were greater at high CO 2 concentrations than at low”
Claim · model-written summary
Net assimilation rate of spring wheat increased with increasing CO2 concentration.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- increasing CO 2 concentratione5
- Outcome
- Net assimilation rate (NAR)e5
- Direction
- increasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e5“Net assimilation rate (NAR) increased with increasing CO 2 concentration and decreased with plant size”
Claim · model-written summary
Net assimilation rate of spring wheat decreased with increasing plant size.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- plant sizee5
- Outcome
- Net assimilation rate (NAR)e5
- Direction
- decreasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e5“Net assimilation rate (NAR) increased with increasing CO 2 concentration and decreased with plant size”
Claim · model-written summary
CO2 enrichment had little effect on leaf weight ratio and leaf area ratio of spring wheat.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- CO 2 enrichmente7
- Outcome
- leaf weight ratio (LWR) and leaf area ratio (LAR)e7
- Direction
- no_changeinferrede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e7“There was little effect of CO 2 enrichment on leaf weight ratio (LWR) and leaf area ratio (LAR) and no significant effect on specific leaf area (SLA)”
Claim · model-written summary
CO2 enrichment had no significant effect on specific leaf area of spring wheat.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- CO 2 enrichmente7
- Outcome
- specific leaf area (SLA)e7
- Direction
- no_changeinferrede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e7“There was little effect of CO 2 enrichment on leaf weight ratio (LWR) and leaf area ratio (LAR) and no significant effect on specific leaf area (SLA)”
Claim · model-written summary
The weight and number of spring wheat seeds were significantly higher with increasing CO2 concentration.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- increasing CO 2 concentratione3
- Outcome
- weight and number of seedse3
- Direction
- highere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e3“The weight and number of seeds were significantly higher with increasing CO 2 concentration”
Claim · model-written summary
Important changes in plant growth and development of spring wheat may occur during the next century if global CO2 enrichment continues.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- plant growth and developmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e4“important changes in plant growth and development may occur during the next century if global CO 2 enrichment continues”
Claim · model-written summary
Some of these changes in spring wheat would have important ecological impact in natural and managed ecosystems in the future.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- important ecological impact in natural and managed ecosystemse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a semi-dwarf spring wheat ( Triticum aestivum L., cv. GWO 1809) were determined under three different atmospheric CO 2 a concentrations (350, 675 and 1000 μ1/1) in controlled environment chambers of the Duke University Phytotron”
e6“Some of these changes would have important ecological impact in natural and managed ecosystems in the future”
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See all 203 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.