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 in | Scientific reports Vol. 9; no. 1; pp. 1 - 10 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group UK
18.06.2019
Nature Publishing Group |
Subjects | |
Online Access | Get full text |
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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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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-019-45232-w |