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Table 1 For each date (week), mean values of soil water content (SWC; %), net CO2 assimilation (A; μmol CO2 m−2 s−1), stomatal conductance to water vapor (gs; mmol H2O m−2 s−1), intrinsic water-use efficiency (Wi = A/gs), diameter at 5 cm (diam; cm), length of terminal shoot (shoot; cm), and total height (height; cm) of the well-watered (WW) P. pinaster trees and the water-stressed (WS) P. pinaster trees for each measurement week

From: Plastic response of four maritime pine (Pinus pinaster Aiton) families to controlled soil water deficit

 

Date (week)

SWC (%)

A (μmol CO2 m−2 s−1)

gs (mmol m−2 s−1)

Wi (μmol CO2 mol H2O−1)

diam (cm)

shoot (cm)

height (cm)

Nad/Ad for WS

Nad/Ad for WS

Nad/Ad for WS

Nad/Ad

Nad/Ad

Nad/Ad

WW

April 4

27.8 ± 2.1 a

13.7 ± 2.7 a

206.3 ± 74.3 a

71.3 ± 16.04 a

3.7 ± 1.6 a

3.4 ± 2.3 a

22.9 ± 5.4 a

WS

Week 0

27.9 ± 1.8 a

12.6 ± 2.4 a/15.57

187.3 ± 74.1 a/254.2

73.4 ± 17.3 a/67.2

3.5 ± 0.4 a/4.1

2.4 ± 1.7 a/8.0

20.6 ± 3.5 a/26.0

WW

April 18

27 ± 2.6 a

15.9 ± 4.2 b

254.4 ± 74.7 b

68.6 ± 16.2 a

4.1 ± 0.6 b

8.3 ± 5.2 b

27.7 ± 6.8 b

WS

Week 2)

18.5 ± 1.3 b

14.3 ± 4.3 ab/15.054

208.2 ± 108.7 ab/227.0

75.9 ± 18.0 a/72.3

3.7 ± 0.4 b/4.0

6.2 ± 4.4 b/7.0

24.0 ± 5 b/24.6

WW

May 9

26.0 ± 2.6 a

18.2 ± 2.7 c

315.0 ± 43.6 c

60.3 ± 12.2 b

4.6 ± 0.8 c

11.9 ± 7 c

30.7 ± 8.1 b

WS

Week 5

11.8 ± 1.2 c

14.4 ± 3.4 b/13.299

167.5 ± 25.3 a/131.0

98.5 ± 43.9 b/96.3

4.1 ± 0.4 c/3.8

8.0 ± 5.4 b/5.4

25.4 ± 5.5 b/23.0

WW

May 16

25.7 ± 2.9 a

18.707 ± 2.5 c

317.3 ± 68.6 c

60.1 ± 7.1 b

4.9 ± 0.8 c

12.706 ± 7.1 c

31.7 ± 8.3 b

WS

Week 6

12.1 ± 1.2 c

15.8 ± 2.5 b/13.699

185.7 ± 62.8 a/141.7

89.4 ± 18.9 b/94.3

4.2 ± 0.5 c/3.6

8.6 ± 5.8 b/5.0

26.2 ± 5.9 b/22.7

  1. Each data is the mean of 32 independent measurements ± standard deviation. For the WS trees, unadjusted (NAd) and adjusted (Ad, in bold) mean values are presented. The adjustment takes into account the ontogenetic effect discovered using the WW trees only. Different letters (a, b, and c) indicate significant differences (p = 0.05 by Student’s t test) between weeks for Nad data