Abstract
Abstract The high vapor pressure deficit (VPD) in some arid and semi-arid climates creates undesirable conditions for the growth of tomato plants ( Solanum lycopersicum L., cv. Jinpeng). The global CO 2 concentration ([CO 2 ]) has also risen in recent years to levels above 400 μmol·mol −1 . However, the coordinated effect of VPD and [CO 2 ] on tomato plant growth remains unclear, especially at VPDs of 5–6 kPa or even higher that are extremely detrimental to plant growth. Here, we explore the interaction of VPD and [CO 2 ] on plant water status, stomatal characteristics, and gas exchange parameters in summer greenhouses in a semi-arid area. Plants were grown in four adjacent glass greenhouses with different environmental conditions: (i) high VPD + low [CO 2 ] representing natural/control conditions; (ii) high VPD + high [CO 2 ] representing enriched CO 2 ; (iii) low VPD + low [CO 2 ] representing reduced VPD; and (iv) low VPD + high [CO 2 ] representing reduced VPD and enriched CO 2 . Reducing the VPD alleviated the water stress of the plant and increased the gas exchange area of the leaf, which was beneficial to the entry of CO 2 into the leaf. At this time, the increase of [CO 2 ] was more beneficial to promote the photosynthetic rate and then improve the water use efficiency and yield.
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Claims 5
Claim · model-written summary
Reducing VPD alleviated tomato water stress.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Reducing the VPDe0
- Outcome
- water stresse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“Reducing the VPD alleviated the water stress of the plant and increased the gas exchange area of the leaf, which was beneficial to the entry of CO 2 into the leaf.”
Claim · model-written summary
Reducing VPD increased tomato leaf gas exchange area.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Reducing the VPDe0
- Outcome
- gas exchange area of the leafe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“Reducing the VPD alleviated the water stress of the plant and increased the gas exchange area of the leaf, which was beneficial to the entry of CO 2 into the leaf.”
Claim · model-written summary
Under reduced VPD, increased CO2 promoted tomato photosynthetic rate.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increase of [CO 2 ]e0
- Outcome
- photosynthetic ratee0
- Direction
- promotee0
- Qualifier
- At this timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“At this time, the increase of [CO 2 ] was more beneficial to promote the photosynthetic rate and then improve the water use efficiency and yield.”
Claim · model-written summary
Under reduced VPD, increased CO2 promoted tomato water use efficiency.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increase of [CO 2 ]e0
- Outcome
- water use efficiencye0
- Direction
- improvee0
- Qualifier
- At this timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“At this time, the increase of [CO 2 ] was more beneficial to promote the photosynthetic rate and then improve the water use efficiency and yield.”
Claim · model-written summary
Under reduced VPD, increased CO2 promoted tomato yield.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increase of [CO 2 ]e0
- Outcome
- yielde0
- Direction
- improvee0
- Qualifier
- At this timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“At this time, the increase of [CO 2 ] was more beneficial to promote the photosynthetic rate and then improve the water use efficiency and yield.”
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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.