. 2022 Jun 15;17(1):2086372. doi: 10.1080/15592324.2022.2086372

Table 1.

Effects of exogenous spermidine on photosynthetic characteristic parameters in citrus seedling leaves under high-temperature stress

Treatment	P_Nmax [μmol m^–2 s^–1]	AQE	LCP [μmol m^–2 s^–1]	LSP [μmol m^–2 s^–1]
CK	15.86 ± 0.22^a	0.039 ± 0.002^a	8.29 ± 0.29^a	906.75 ± 19.65^a
Spd	15.92 ± 0.16^a	0.040 ± 0.003^a	8.33 ± 0.33^a	914.64 ± 13.67^a
HT	5.79 ± 0.20^c	0.022 ± 0.001^c	11.58 ± 0.23^c	621.36 ± 24.99^c
Spd + HT	8.33 ± 0.21^b	0.034 ± 0.002^b	9.33 ± 0.14^b	764.44 ± 20.23^b

Note: For each variable, different lowercase letters indicate statistically significant by Duncan multiple- range test at P < 0.05. Data were expressed as the mean ± standard error of three independent biological replicates. Key: P_Nmax – maximum photosynthetic rate, AQE – apparent quantum efficiency, LCP – light compensation point, LSP – light saturation point.