Table 3 Effects of exogenous ABA on fluorescence parameters of five treatment time course in the presence of salinity.

From: Physiological mechanisms of ABA-induced salinity tolerance in leaves and roots of rice

Fluorescence parameters

Treatments

Duration of salt stress (days)

2

4

6

8

10

Fv/Fm

Q0

0.803 ± 0.002b

0.799 ± 0.005a

0.795 ± 0.001ab

0.787 ± 0.001ab

0.786 ± 0.002b

Q1

0.810 ± 0.002ab

0.801 ± 0.003a

0.784 ± 0.007b

0.786 ± 0.003b

0.780 ± 0.003c

Q2

0.809 ± 0.001ab

0.801 ± 0.004a

0.801 ± 0.004a

0.779 ± 0..006b

0.792 ± 0.001ab

Q3

0.813 ± 0.004a

0.793 ± 0.005a

0.798 ± 0.002a

0.793 ± 0.003a

0.793 ± 0.002a

Z0

0.796 ± 0.013a

0.798 ± 0.002ab

0.791 ± 0.003ab

0.783 ± 0.003a

0.777 ± 0.003b

Z1

0.802 ± 0.002a

0.794 ± 0.002b

0.787 ± 0.002b

0.789 ± 0.002a

0.776 ± 0.003b

Z2

0.804 ± 0.003a

0.797 ± 0.002ab

0.793 ± 0.002ab

0.742 ± 0.013b

0.792 ± 0.003a

Z3

0.808 ± 0.001a

0.808 ± 0.007a

0.801 ± 0.006a

0.783 ± 0.006a

0.784 ± 0.004ab

Fv/F0

Q0

4.080 ± 0.043b

4.024 ± 0.143a

3.866 ± 0.030ab

3.688 ± 0.025ab

3.681 ± 0.044b

Q1

4.270 ± 0.046ab

4.036 ± 0.094a

3.776 ± 0.039b

3.679 ± 0.057ab

3.554 ± 0.057c

Q2

4.245 ± 0.024ab

4.058 ± 0.120a

4.060 ± 0.109a

3.625 ± 0.088b

3.803 ± 0.025ab

Q3

4.393 ± 0.149a

3.862 ± 0.098a

3.962 ± 0.057ab

3.833 ± 0.060a

3.837 ± 0.038a

Z0

4.076 ± 0.169a

3.962 ± 0.049ab

3.758 ± 0.029b

3.562 ± 0.065a

3.504 ± 0.065bc

Z1

4.065 ± 0.048a

3.868 ± 0.045b

3.700 ± 0.050b

3.752 ± 0.052a

3.467 ± 0.061c

Z2

4.104 ± 0.071a

3.928 ± 0.048ab

3.839 ± 0.044ab

3.020 ± 0.170b

3.825 ± 0.075a

Z3

4.223 ± 0.039a

4.051 ± 0.043a

3.930 ± 0.075a

3.770 ± 0.044a

3.677 ± 0.064ab

Fm/F0

Q0

5.080 ± 0.043b

5.024 ± 0.143a

4.866 ± 0.030ab

4.688 ± 0.026b

4.681 ± 0.044b

Q1

5.270 ± 0.046ab

5.036 ± 0.094a

4.669 ± 0.113b

4.679 ± 0.057b

4.554 ± 0.057c

Q2

5.245 ± 0.024ab

5.058 ± 0.120a

5.060 ± 0.109a

4.625 ± 0.087b

4.803 ± 0.025ab

Q3

5.393 ± 0.149a

4.862 ± 0.098a

4.962 ± 0.057a

4.897 ± 0.038a

4.837 ± 0.038a

Z0

5.138 ± 0.086a

4.962 ± 0.049ab

4.758 ± 0.029a

4.608 ± 0.063a

4.504 ± 0.065bc

Z1

5.065 ± 0.048a

4.868 ± 0.045b

4.700 ± 0.050a

4.752 ± 0.052a

4.467 ± 0.061c

Z2

5.104 ± 0.071a

4.928 ± 0.048ab

4.750 ± 0.139a

4.041 ± 0.180b

4.827 ± 0.074a

Z3

5.223 ± 0.039a

5.051 ± 0.043a

4.930 ± 0.075a

4.645 ± 0.115a

4.676 ± 0.064ab

NPQ

Q0

0.357 ± 0.050a

0.445 ± 0.035a

0.450 ± 0.042a

0.808 ± 0.055a

0.683 ± 0.088a

Q1

0.292 ± 0.037a

0.368 ± 0.029a

0.453 ± 0.073a

0.608 ± 0.027b

0.716 ± 0.057a

Q2

0.344 ± 0.027a

0.363 ± 0.015a

0.673 ± 0.076a

0.612 ± 0.037b

0.898 ± 0.092a

Q3

0.362 ± 0.014a

0.447 ± 0.052a

0.604 ± 0.076a

0.500 ± 0.095b

0.862 ± 0.062a

Z0

0.465 ± 0.022a

0.280 ± 0.036b

0.270 ± 0.020c

0.980 ± 0.027a

0.932 ± 0.104a

Z1

0.404 ± 0.037ab

0.430 ± 0.025ab

0.326 ± 0.057bc

0.858 ± 0.052a

0.944 ± 0.129a

Z2

0.327 ± 0.038b

0.663 ± 0.087a

0.542 ± 0.043a

0.668 ± 0.064b

0.940 ± 0.036a

Z3

0.407 ± 0.043ab

0.460 ± 0.079ab

0.468 ± 0.042ab

0.577 ± 0.066b

0.733 ± 0.067a

Qp

Q0

0.318 ± 0.029a

0.326 ± 0.019a

0.280 ± 0.015c

0.312 ± 0.024ab

0.326 ± 0.024b

Q1

0.246 ± 0.027a

0.240 ± 0.016b

0.300 ± 0.017bc

0.254 ± 0.021ab

0.338 ± 0.012ab

Q2

0.246 ± 0.022a

0.282 ± 0.030ab

0.380 ± 0.036ab

0.243 ± 0.026b

0.405 ± 0.035a

Q3

0.300 ± 0.029a

0.260 ± 0.026ab

0.413 ± 0.033a

0.345 ± 0.047a

0.384 ± 0.020ab

Z0

0.376 ± 0.026a

0.368 ± 0.038bc

0.270 ± 0.029ab

0.414 ± 0.015a

0.362 ± 0.019a

Z1

0.332 ± 0.018a

0.338 ± 0.026c

0.212 ± 0.054b

0.414 ± 0.015a

0.396 ± 0.021a

Z2

0.230 ± 0.038b

0.526 ± 0.012a

0.378 ± 0.027a

0.367 ± 0.034ab

0.366 ± 0.019a

Z3

0.422 ± 0.041a

0.447 ± 0.023ab

0.380 ± 0.019a

0.310 ± 0.025b

0.352 ± 0.012a

Qy

Q0

0.824 ± 0.002ab

0.820 ± 0.003ab

0.812 ± 0.002bc

0.812 ± 0.002a

0.806 ± 0.002a

Q1

0.828 ± 0.002a

0.824 ± 0.002a

0.806 ± 0.002c

0.812 ± 0.002a

0.782 ± 0.028a

Q2

0.818 ± 0.002b

0.812 ± 0.004b

0.820 ± 0.003ab

0.794 ± 0.013a

0.782 ± 0.033a

Q3

0.830 ± 0.003a

0.818 ± 0.002ab

0.822 ± 0.004a

0.808 ± 0.007a

0.812 ± 0.004a

Z0

0.822 ± 0.004a

0.818 ± 0.004a

0.814 ± 0.002a

0.808 ± 0.002a

0.794 ± 0.011a

Z1

0.822 ± 0.002a

0.816 ± 0.002a

0.812 ± 0.002a

0.790 ± 0.023a

0.778 ± 0.025a

Z2

0.828 ± 0.002a

0.810 ± 0.006a

0.794 ± 0.007b

0.764 ± 0.030a

0.656 ± 0.144a

Z3

0.824 ± 0.002a

0.814 ± 0.002a

0.820 ± 0.003a

0.788 ± 0.015a

0.812 ± 0.004a

Rfd

Q0

0.533 ± 0.029a

0.654 ± 0.058a

0.643 ± 0.058b

1.060 ± 0.081a

0.948 ± 0.139a

Q1

0.400 ± 0.055a

0.468 ± 0.041b

0.813 ± 0.041ab

0.786 ± 0.038bc

1.022 ± 0.080a

Q2

0.468 ± 0.030a

0.537 ± 0.043ab

1.158 ± 0.094a

0.743 ± 0.048c

1.330 ± 0.166a

Q3

0.478 ± 0.044a

0.607 ± 0.068ab

0.942 ± 0.139ab

0.957 ± 0.088ab

1.308 ± 0.114a

Z0

0.674 ± 0.059a

0.480 ± 0.093c

0.442 ± 0.043b

1.378 ± 0.066a

1.266 ± 0.152ab

Z1

0.606 ± 0.055a

0.700 ± 0.055c

0.464 ± 0.044b

1.308 ± 0.077a

1.407 ± 0.173a

Z2

0.416 ± 0.082b

1.434 ± 0.098a

0.855 ± 0.054a

0.923 ± 0.072b

1.356 ± 0.062a

Z3

0.686 ± 0.040a

1.07 ± 0.142b

0.863 ± 0.140a

0.864 ± 0.130b

0.970 ± 0.078b

  1. Fv/Fm indicates maximal photochemical efficiency of PS II, Fv/Fo indicates potential activity of PS II, Fm/Fo indicates electron transfer case of PS II, NPQ indicates non-photochemical quenching coefficient, Qp indicates the coefficient of photochemical fluorescence quenching, Qy indicates effective photochemical efficiency of PS II, Rfd indicates fluorescence decrease ratio. Q0 treatment of water, Q1 treatment with ABA, Q2 treatment with NaCl, Q3 treatment with ABA + NaCl in Chaoyouqianhao. Z0 treatment of water, Z1 treatment with ABA, Z2 treatment with NaCl, Z3 treatment with ABA + NaCl in Huanghuazhan. Datas are mean ± standard error of at least four replicates. Within each column, different letters indicate significant difference at the five percent significant level according to Duncan's multiple range tests.
Back to article page