Abstract
ABSTRACT The frequency and intensity of drought are projected to increase globally, threatening plant growth. However, the role of elevated CO 2 (e[CO 2 ]) in plant drought recovery, particularly with respect to photosynthesis and water use efficiency (WUE), remains unclear. The study investigated the impact of e[CO 2 ] (800 μmol mol −1 ) on the gas exchange parameters, stomatal morphology and distribution, and leaf tissue structure of tobacco plants under various water levels (full irrigation [FI], mild water deficit [MI], moderate water deficit [MO] and severe water deficit [SE]) within growth chambers. The results revealed that stomatal limitations significantly reduced CO 2 assimilation under MI to MO, whereas non‐stomatal limitations became more prominent under more severe deficit. Moreover, the instantaneous water use efficiency ( WUE n ) and intrinsic water use efficiency ( WUE i ) of tobacco plants grown under e[CO 2 ] were approximately twofold greater than those of plants grown under ambient [CO 2 ] (a[CO 2 ]). Moreover, e[CO 2 ] led to distinct adjustment strategies in response to varying water availability, thereby alleviating the adverse effects of water deficit on plants. These findings indicate that e[CO 2 ] enhances leaf water use efficiency in tobacco plants by modulating stomatal behaviour and increase our understanding of the potential mechanism through which the CO 2 fertilization effect improves plant drought resistance.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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 6
Claim · model-written summary
Stomatal limitations significantly reduced CO2 assimilation under mild to moderate water deficit.
- Taxon
- Tobacco Plants
Nicotiana tabacumt0 - Treatment
- MI to MOe0
- Outcome
- CO 2 assimilatione0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Plants ( Nicotiana tabacum L.)”
e0“stomatal limitations significantly reduced CO 2 assimilation under MI to MO”
Claim · model-written summary
Non-stomatal limitations became more prominent under more severe water deficit.
- Taxon
- Tobacco PlantsNicotiana tabacumt0
- Outcome
- non‐stomatal limitationse0
- Direction
- more prominente0
- Qualifier
- more severe deficite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Plants ( Nicotiana tabacum L.)”
e0“non‐stomatal limitations became more prominent under more severe deficit”
Claim · model-written summary
Elevated CO2 approximately doubled instantaneous water-use efficiency relative to ambient CO2.
- Taxon
- tobacco plantsNicotiana tabacume0
- Treatment
- e[CO 2 ]e0
- Outcome
- instantaneous water use efficiency ( WUE n )e0
- Direction
- greatere0
- Value
- twofolde0
- Comparator
- ambient [CO 2 ]e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the instantaneous water use efficiency ( WUE n ) and intrinsic water use efficiency ( WUE i ) of tobacco plants grown under e[CO 2 ] were approximately twofold greater than those of plants grown under ambient [CO 2 ] (a[CO 2 ])”
Claim · model-written summary
Elevated CO2 approximately doubled intrinsic water-use efficiency relative to ambient CO2.
- Taxon
- tobacco plantsNicotiana tabacume0
- Treatment
- e[CO 2 ]e0
- Outcome
- intrinsic water use efficiency ( WUE i )e0
- Direction
- greatere0
- Value
- twofolde0
- Comparator
- ambient [CO 2 ]e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the instantaneous water use efficiency ( WUE n ) and intrinsic water use efficiency ( WUE i ) of tobacco plants grown under e[CO 2 ] were approximately twofold greater than those of plants grown under ambient [CO 2 ] (a[CO 2 ])”
Claim · model-written summary
Elevated CO2 alleviated adverse water-deficit effects through varying adjustment strategies.
Verbatim
e0“e[CO 2 ] led to distinct adjustment strategies in response to varying water availability, thereby alleviating the adverse effects of water deficit on plants”
Claim · model-written summary
The authors attribute enhanced tobacco leaf water-use efficiency under elevated CO2 to modulated stomatal behaviour.
- Taxon
- tobacco plantsNicotiana tabacume0
- Treatment
- e[CO 2 ]e0
- Outcome
- leaf water use efficiencye0
- Direction
- enhancese0
- Qualifier
- modulating stomatal behavioure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“e[CO 2 ] enhances leaf water use efficiency in tobacco plants by modulating stomatal behaviour”
The same questions in other papers
co2 · physiology: water · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- 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.