Table 3 The maximum quantum yield of photosystem 2 (PS2) photochemistry (Fv/Fm), effective quantum yield of PS2 (ФPS2), photochemical quenching (qP), non-photochemical quenching (qN), effective quantum yield of photochemical energy conservation in PS2 (Fv′/Fm′) and electron transport rate (ETR) of P. vulgaris seedlings under different water (W) and fertilization (F) regimes

W1/F0

0.80 ± 0.03 b

0.18 ± 0.02 c

0.46 ± 0.06 c

1.82 ± 0.06 ab

0.39 ± 0.01 e

90.45 ± 4.26 c

W1/F1

0.84 ± 0.01 a

0.26 ± 0.01 b

0.62 ± 0.02 ab

1.91 ± 0.04 a

0.43 ± 0.01 cd

131.12 ± 3.74 b

W1/F2

0.82 ± 0.01 a

0.24 ± 0.04 b

0.58 ± 0.05 b

1.91 ± 0.14 a

0.41 ± 0.03 de

114.19 ± 20.03 b

W2/F0

0.80 ± 0.01 b

0.26 ± 0.01 b

0.58 ± 0.01 b

1.64 ± 0.03 c

0.45 ± 0.02 bc

92.56 ± 9.95 c

W2/F1

0.84 ± 0.01 a

0.32 ± 0.01 a

0.68 ± 0.00 a

1.75 ± 0.03 bc

0.48 ± 0.01 a

168.02 ± 7.14 a

W2/F2

0.83 ± 0.01 a

0.30 ± 0.05 a

0.56 ± 0.17 b

1.69 ± 0.07 c

0.45 ± 0.02 ab

150.70 ± 22.53 a

Water (W)

0.69

56.76**

19.77**

69.68**

110.67**

38.14**

Fertilization (F)

29.97**

25.42**

27.43**

6.87**

14.45**

72.94**

W × F

1.33

0.79

4.56*

0.41

0.58

8.00**