Root-zone temp.

No. of leaves

Leaf area (cm³)

Stem length (cm)

Stem diameter (mm)

10˚C

6.8 ± 0.2 a

103.3 ± 5.6 b

5.3 ± 0.3 b

3.7 ± 0.1 b

20˚C

7.3 ± 0.2 a

140.5 ± 8.5 a

5.2 ± 0.3 b

4.7 ± 0.2 a

25˚C

7.2 ± 0.2 a

134.0 ± 5.8 ab

6.3 ± 0.1 a

4.8 ± 0.2 a

30˚C

7.6 ± 0.2 a

131.1 ± 4.5 ab

6.1 ± 0.1 ab

4.6 ± 0.1 a