Fig. 5

The effect of 0.0, 2.0, 4.0, 6.0, and 8.0 mM of NaHS on Chl a, Chl b, and carotenoid contents. A The contents of Chl a in the extracted fresh leaves treated with NaHS on 0 day and 15 days. B The contents of Chl b in the extracted fresh leaves treated with NaHS on 0 day and 15 days. C The contents of carotenoid in the extracted fresh leaves treated with NaHS on 0 day and 15 days. Different letters in lowercase denote significant differences between treatment groups at the 5% level, according to Duncan’s test