Day/night temperature treatments, ˚C

Temperature, ˚C

CO₂ concentration,

µmol mol⁻¹

Mean daily VPD, kPa

Day

Night

Day/night

20/12

20.21†e

12.65e

16.94e

419a

0.55e

25/17

25.05d

17.20d

21.64d

419a

1.19d

30/22

29.28c

21.64c

25.97c

420a

1.49c

35/27

34.15b

26.52b

30.83b

421a

2.67b

40/32

38.67a

31.03a

35.36a

421a

3.68a