. 2020 May 29;11:696. doi: 10.3389/fpls.2020.00696

TABLE 1.

Effect of exogenous H₂S with different concentrations on net photosynthetic rate and chlorophyll content in peach seedlings leaves under waterlogging stress.

Treatments	Control	Waterlogging + NaHS
		0 mM	0.02 mM	0.05 mM	0.1 mM	0.2 mM	0.3 mM
Pn (μM CO₂ m^–2 s^–1)	13.67 ± 0.551^a	4.10 ± 0.400^f	4.77 ± 0.513^ef	5.50 ± 0.656^e	7.53 ± 0.737^d	9.80 ± 0.361^b	8.63 ± 0.451^c
Chlorophyll a (mg g^–1 FW)	0.65 ± 0.001^a	0.58 ± 0.004^f	0.59 ± 0.005^ef	0.60 ± 0.002^e	0.62 ± 0.006^d	0.64 ± 0.001^b	0.63 ± 0.005^c
Chlorophyll b (mg g^–1 FW)	0.20 ± 0.009^a	0.15 ± 0.007^e	0.16 ± 0.003^d	0.16 ± 0.001^cd	0.17 ± 0.004^c	0.18 ± 0.004^b	0.17 ± 0.002^bc
Chlorophyll a+b (mg g^–1 FW)	0.85 ± 0.010^a	0.73 ± 0.010^e	0.75 ± 0.008^d	0.76 ± 0.003^d	0.78 ± 0.010^c	0.81 ± 0.004^b	0.80 ± 0.006^c

Pn, Net photosynthetic rate (μM CO₂ m^–2 s^–1); Significant differences (P < 0.05) between treatments were indicated by different small letters. Values represent the averages of three biological replicates ± SD.