Table 2 Effects of GSH application on P0 (the leaf photosynthetic rate when irradiance = 0), Pmax (the maximum leaf photosynthetic rate), α (quantum yield), Vmax (the maximum velocity of RuBP carboxylation by Rubisco) and Jmax (the maximum potential rate of electron transport contributing to RuBP regeneration) of cucumber 4 days after the high root-zone temperature treatment, and 4 days recovery.

From: Exogenous glutathione improves high root-zone temperature tolerance by modulating photosynthesis, antioxidant and osmolytes systems in cucumber seedlings

Treatment

P0 (μmol CO2 m−2s−1)

α

Pmax (μmol CO2 m−2s−1)

Vc,max (μmol m−2s−1)

Jmax (μmol m−2s−1)

4 days after the high root zone temperature treatment

NT

2.415 ± 0.199a

0.0794 ± 0.0035a

26.61 ± 0.34a

47.30 ± 1.32a

126.63 ± 12.74a

NT+GSH

2.158 ± 0.193a

0.0775 ± 0.0033a

27.17 ± 0.34a

47.54 ± 1.58a

136.53 ± 6.01a

HT

1.033 ± 0.090b

0.0194 ± 0.0013c

8.58 ± 0.19c

20.42 ± 4.58c

45.51 ± 4.88c

HT+GSH

2.174 ± 0.094a

0.0556 ± 0.0016b

19.20 ± 0.16b

40.73 ± 1.50b

97.81 ± 6.68b

4 days after recovery

NT

2.241 ± 0.054a

0.0769 ± 0.0009a

29.20 ± 0.10a

46.43 ± 2.92a

131.63 ± 6.86a

NT+GSH

1.942 ± 0.229a

0.0802 ± 0.0038a

29.16 ± 0.41ab

46.27 ± 2.55a

128.64 ± 7.80a

HT

2.285 ± 0.169a

0.0721 ± 0.0029a

24.78 ± 0.29c

40.24 ± 0.89b

101.35 ± 7.44c

HT+GSH

2.063 ± 0.213a

0.0723 ± 0.0034a

27.77 ± 0.40b

41.33 ± 3.20b

110.86 ± 12.68b

  1. Data represent the mean ± SD (n = 3). Different letters indicate significant differences at P < 0.05 based on the Least Significant Difference test.
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