Table 3 Effect of BR application on photosynthetic pigment content and net photosynthetic rate in leaves of two foxtail millet cultivars under Sigma Broad treatment.

From: Spraying Brassinolide improves Sigma Broad tolerance in foxtail millet (Setaria italica L.) through modulation of antioxidant activity and photosynthetic capacity

cultivars

time

treatment

Chlorophyll (mg/g)

Carotenoid (mg/g)

Chl a/b

P N (µmol/m2/s)

Jingu 21

7 DAT

Control (Water)

13.53 ± 4.27 a

2.29 ± 0.66 a

3.85 ± 0.30 a

18.86 ± 3.40 a

Sigma Broad

8.56 ± 2.89 a

1.56 ± 0.50 a

3.61 ± 0.31 a

10.59 ± 0.83 b

BR + Sigma Broad

10.42 ± 2.15 a

1.83 ± 0.19 a

3.57 ± 0.31 a

13.52 ± 0.98 b

15 DAT

Control (Water)

19.80 ± 3.18 a

3.23 ± 0.49 a

4.45 ± 0.03 a

17.12 ± 1.22 a

Sigma Broad

10.27 ± 2.97 b

2.12 ± 0.20 a

5.41 ± 1.50 a

8.27 ± 1.32 c

BR + Sigma Broad

11.75 ± 0.28 b

2.30 ± 0.78 a

4.04 ± 0.81 a

12.12 ± 1.55 b

Zhangza 5

7 DAT

Control (Water)

12.20 ± 1.26 a

2.02 ± 0.17 a

3.89 ± 0.63 a

17.28 ± 2.55 a

Sigma Broad

4.91 ± 1.89 b

1.18 ± 0.60 a

2.57 ± 0.72 a

9.85 ± 0.89 b

BR + Sigma Broad

6.87 ± 0.85 b

1.56 ± 0.56 a

2.85 ± 1.49 a

12.96 ± 1.96 b

15 DAT

Control (Water)

15.69 ± 5.89 a

2.98 ± 0.66 a

4.92 ± 0.98 a

16.64 ± 1.93 a

Sigma Broad

7.99 ± 0.70 a

1.88 ± 0.36 a

6.06 ± 1.93 a

7.82 ± 1.12 b

BR + Sigma Broad

8.80 ± 1.19 a

1.99 ± 0.44 a

5.61 ± 2.09 a

11.05 ± 2.36 b

  1. Data are the mean ± standard error (n = 3). Duncan’s multiple range test at 5% probability level was used to compare the mean values of the treatment effects in each cultivar. Same letters after data indicate non-significant differences between treatments (P < 0.05).
  2. Chl a/b chlorophyll a/b, PN net photosynthetic rate.
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