Abstract
Two poplar clones, I-214 (Populus euramericana) and Peace (P. Koreana × P. trichocarpa), were grown for 21 days in growth chambers at different CO₂concentrations (350, 700 and 2,000 μL·L-1). I-214 has stomata responding to environmental conditions in normal ways and Peace has unresponsive stomata to environmental factors including light, ABA, water stress and CO₂. In both plants, elevated CO₂ stmulated the growth of plant parts, especially leaf dry weight. And a CO₂ enrichment of 700 μL·L-1 CO₂ caused increment of net assimilation rate (NAR). The growth responses of these plants to CO₂ enrichment were different especially at high CO₂ condition (2,000 μL·L-1 CO₂). The total dry weight in Peace increased up to 2,000 μL·L-1 CO₂ but not in I-214. A CO₂ enrichment of 2,000 2,000 μL·L-1 CO₂ had little effect on NAR of I-214 but enhanced NAR of Peace. Although it is uncertain whether the different responses to CO₂ enrichment between I-214 and Peace resulted from the different properties of stomatal responses to long-term CO₂ treatment, the decrease in NAR is probably due in part to CO₂-induced stomatal closure in I-214 but not in Peace.
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Claims 7
Claim · model-written summary
Elevated carbon dioxide stimulated growth of plant parts, especially leaf dry weight, in both poplar clones.
- Treatment
- elevated CO₂e0
- Outcome
- growth of plant parts, especially leaf dry weighte0
- Direction
- stmulatede0
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, elevated CO₂ stmulated the growth of plant parts, especially leaf dry weight.”
t0“Poplar”
Claim · model-written summary
Carbon dioxide enrichment at 700 μL·L-1 increased net assimilation rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a CO₂ enrichment of 700 μL·L-1 CO₂ caused increment of net assimilation rate (NAR)”
t0“Poplar”
Claim · model-written summary
Total dry weight in Peace increased up to 2,000 μL·L-1 carbon dioxide.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total dry weight in Peace increased up to 2,000 μL·L-1 CO₂”
t0“Poplar”
Claim · model-written summary
Total dry weight in I-214 did not increase up to 2,000 μL·L-1 carbon dioxide.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total dry weight in Peace increased up to 2,000 μL·L-1 CO₂ but not in I-214.”
t0“Poplar”
Claim · model-written summary
Carbon dioxide enrichment at 2,000 μL·L-1 had little effect on net assimilation rate in I-214.
- Material
- I-214e0
- Treatment
- CO₂ enrichment of 2,000 2,000 μL·L-1 CO₂e0
- Outcome
- NAR of I-214e0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A CO₂ enrichment of 2,000 2,000 μL·L-1 CO₂ had little effect on NAR of I-214”
t0“Poplar”
Claim · model-written summary
Carbon dioxide enrichment at 2,000 μL·L-1 enhanced net assimilation rate in Peace.
- Material
- Peacee0
- Treatment
- CO₂ enrichment of 2,000 2,000 μL·L-1 CO₂e0
- Outcome
- NAR of Peacee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A CO₂ enrichment of 2,000 2,000 μL·L-1 CO₂ had little effect on NAR of I-214 but enhanced NAR of Peace.”
t0“Poplar”
Claim · model-written summary
The authors suggest carbon dioxide induced stomatal closure partly explains decreased net assimilation rate in I-214.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in NAR is probably due in part to CO₂-induced stomatal closure in I-214 but not in Peace”
t0“Poplar”
The same questions in other papers
co2 · growth · Populus (poplar)Results differ
17 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
15 papers more in this group
See all 19 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.