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Table 1 Results of ANCOVA for effects of the humidification treatment and fast-imposed water deficit on leaf water status, temperature, gas exchange and hydraulic conductance (N = 117–124)

From: Rapid and long-term effects of water deficit on gas exchange and hydraulic conductance of silver birch trees grown under varying atmospheric humidity

Dependent variable

Effect

Statistical significance

Partial η2

Leaf water potential, ΨL

Treatment

P < 0.001

0.090

 

Branch water status

P < 0.001

0.763

Leaf temperature, TL

Treatment

ns

-

 

Branch water status

P < 0.001

0.246

Leaf conductance to water vapour, gL

Treatment

P < 0.001

0.101

 

Branch water status

P < 0.001

0.544

Transpiration rate, E

Treatment

P < 0.001

0.088

 

Branch water status

P < 0.001

0.401

 

Leaf temperature

P < 0.001

0.127

Stomatal conductance, gS

Treatment

P = 0.026

0.041

 

Branch water status

P < 0.001

0.543

 

Leaf temperature

P = 0.021

0.044

Ratio of intercellular to ambient CO2 concentrations, Ci/Ca

Treatment

ns

-

 

Branch water status

P < 0.001

0.338

Net photosynthesis, An

Treatment

ns

-

 

Branch water status

P < 0.001

0.518

 

Leaf temperature

P = 0.039

0.037

Intrinsic water-use efficiency, IWUE

Treatment

ns

-

 

Branch water status

P < 0.001

0.140

Leaf hydraulic conductance, KL

Treatment

P = 0.022

0.039

 

Leaf water status

P < 0.001

0.433

 

Leaf temperature

P = 0.004

0.062

  1. ns, not significant.