Table 9 Effects of foliar α-oxoglutarate and nitrogen on photosynthetic rate under drought stress (µmol CO₂ m⁻² s⁻¹).

DS1

23.79^b

20.89^c

22.09^c

18.54^c

20.67^c

16.38^c

DS2

24.08^b

21.06^c

22.18^c

18.86^c

20.71^c

16.25^c

DS3

25.75^b

23.51^b

24.36^b

20.31^b

22.94^b

18.06^b

CK1

21.85^c

19.87^d

19.84^d

16.25^d

17.80^d

14.01^d

CK2

28.28^a

22.12^a

28.31^a

22.38^a

26.48^a

22.38^a

Analysis of variance (ANOVA)

Treatment (T)

*

*

*

**

**

***

Cultivar (C)

*

**

**

C × T

*

*

**