Coordination between vapor pressure deficit and CO2 on the regulation of photosynthesis and productivity in greenhouse tomato production

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 coor...

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Published inScientific reports Vol. 9; no. 1; pp. 1 - 10
Main Authors Jiao, Xiao-Cong, Song, Xiao-Ming, Zhang, Da-Long, Du, Qing-Jie, Li, Jian-Ming
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 18.06.2019
Nature Publishing Group
Subjects
631/449/1734
631/449/2124
Carbon dioxide
Environmental conditions
Gas exchange
Greenhouses
Humanities and Social Sciences
Leaves
multidisciplinary
Photosynthesis
Plant growth
Pressure
Science
Science (multidisciplinary)
Stomata
Vapors
Water stress
Water use
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Summary: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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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-45232-w