. 2012 Apr 25;13(5):5290–5306. doi: 10.3390/ijms13055290

Table 3.

The effect of irradiance levels on photosynthesis, Fv/Fm and Fm/Fo in Labisia pumila.

Irradiance (μmol/m²/s)	Net Photosynthesis, A (μmol/m²/s)	Maximum Efficiency of Photosystem II (Fv/Fm )	Fm/Fo
225	12.71 ± 0.15 ^a	0.810 ± 0.234 ^a	12.71 ± 0.01 ^a
500	9.12 ± 0.45 ^b	0.771 ± 0.123 ^b	9.12 ± 0.43 ^b
675	3.11 ± 0.32 ^c	0.711 ± 0.213 ^c	3.11 ± 0.54 ^c
900	2.11 ± 0.22 ^d	0.681 ± 0.011 ^d	2.11 ± 0.44 ^d

All analyses are mean ± standard error of mean (SEM), N = 45. Means within a column not sharing a common single letter were significantly different at P ≤ 0.05.