Table 1 Comparison of plant water status between high- and low-VPD treatments.

From: Vapour pressure deficit control in relation to water transport and water productivity in greenhouse tomato production during summer

Traits

Units

High VPD

Low VPD

P

Predawn Ψ leaf

MPa

−0.262 ± 0.036

−0.233 ± 0.033

NS

Midday Ψ leaf

MPa

−1.47 ± 0.035

−1.03 ± 0.038

**

Midday Kplant

mmol m−2 S−1 MPa−1

8.73 ± 0.703

11.8 ± 0.822

**

Midday Tcanopy

°C

33.7 ± 0.603

31.3 ± 0.325

**

Midday CWSI

 

0.367 ± 0.005

0.272 ± 0.008

*

Midday RWC

 

78.2% ± 0.911%

84.6% ± 1.70%

**

  1. The data represent the means ± SE (n = 10). Ψleaf, leaf water potential; Kplant, plant hydraulic conductance; Tcanopy, canopy temperature; CWSI, crop water stress index; RWC, leaf relative water content. Significant differences between high- and low-VPD treatments were compared using Tukey’s test.*Significant at P < 0.05; **Significant at P < 0.01; NS: non-significant difference.
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