Abstract
The interaction of CO 2 enrichment and drought on water status and growth of pea plants was investigated. Pisum sativum L. (cv. Alaska) plants were grown from seeds in growth chambers using 350 and 675 μl I1 CO 2 , a photon flux density of 600 μmol M‐2 S‐1, a 16 h photoperiod and a temperature regime of 20/14°C. The drought treatment was started at the beginning of branch initiation and lasted for 9 or 11 days. The water status of the plants was monitored daily by measuring total leaf water potential and stomatal conductance. The total leaf water potential of well‐watered plants was not affected by the CO 2 level. Under draughting conditions total leaf water potential decreased, with a slower decrease under the high CO 2 regime, due, at least in part, to reduced stomatal conductance. Upon rewatering, total leaf water potential and stomatal conductance recovered within one day. High CO 2 counteracted the reduction in height and, to some extent, leaf area that developed in low CO 2 unwatered plants. Additional CO 2 had no effect on branch number and did not prevent the complete inhibition of branch development that resulted from drought stress. Removing the drought conditions resulted in a rapid recovery of the internal water status and also a rapid recovery of most, but not all, plant growth parameters.
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Claims 9
Claim · model-written summary
CO2 level did not affect well-watered leaf water potential.
- Taxon
- Pisum sativum L.
Lathyrus oleraceuse1 - Material
- cv. Alaskae1
- Treatment
- CO 2 levele0
- Outcome
- total leaf water potentiale0
- Direction
- not affectede0
- Comparator
- well‐watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total leaf water potential of well‐watered plants was not affected by the CO 2 level”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Drought decreased leaf water potential more slowly under high CO2.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- high CO 2 regimee0
- Outcome
- total leaf water potentiale0
- Direction
- slower decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under draughting conditions total leaf water potential decreased, with a slower decrease under the high CO 2 regime”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Reduced stomatal conductance partly explained slower water potential decline under high CO2.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Outcome
- slower decreasee0
- Qualifier
- reduced stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a slower decrease under the high CO 2 regime, due, at least in part, to reduced stomatal conductance”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Water potential and stomatal conductance recovered within one day after rewatering.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- rewateringe0
- Outcome
- total leaf water potential and stomatal conductancee0
- Direction
- recoverede0
- Value
- one daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Upon rewatering, total leaf water potential and stomatal conductance recovered within one day”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
High CO2 counteracted drought-associated height reduction.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- High CO 2e0
- Outcome
- heighte0
- Direction
- counteracted the reductione0
- Comparator
- low CO 2 unwatered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High CO 2 counteracted the reduction in height and, to some extent, leaf area that developed in low CO 2 unwatered plants”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
High CO2 partly counteracted drought-associated leaf area reduction.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- High CO 2e0
- Outcome
- leaf areae0
- Direction
- counteracted the reductione0
- Qualifier
- to some extente0
- Comparator
- low CO 2 unwatered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High CO 2 counteracted the reduction in height and, to some extent, leaf area that developed in low CO 2 unwatered plants”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Additional CO2 had no effect on branch number.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- Additional CO 2e0
- Outcome
- branch numbere0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additional CO 2 had no effect on branch number”
e1“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Additional CO2 did not prevent drought inhibition of branch development.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse2
- Treatment
- Additional CO 2e1
- Outcome
- branch developmente0
- Direction
- did not prevent the complete inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not prevent the complete inhibition of branch development that resulted from drought stress”
e1“Additional CO 2”
e2“Pisum sativum L. (cv. Alaska)”
Claim · model-written summary
Removing drought rapidly restored internal water status and most growth parameters.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- Removing the drought conditionse0
- Outcome
- internal water statuse0
- Direction
- rapid recoverye0
- Qualifier
- most, but not all, plant growth parameterse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing the drought conditions resulted in a rapid recovery of the internal water status and also a rapid recovery of most, but not all, plant growth parameters”
e1“Pisum sativum L. (cv. Alaska)”
The same questions in other papers
co2 · growth · Lathyrus oleraceus (pea)Results differ
12 papers in the same direction as this paper · 4 in the opposite direction
- positive
- no effect
- negative
13 papers more in this group
See all 17 papers →drought · physiology: water · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 papers →co2 · physiology: water · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.