Table 2.

Influence of different phosphate treatments on photosynthesis in Qi319 and Qi319-96

Inbred lines	P treatment	Pn (μmol CO2 m-2 s-1)	Ci (μmol mol-1)	Ls
Qi319-96	+P	22.09 ± 0.35a	76.49 ± 1.56c	0.79 ± 0.03a
	-P	12.96 ± 0.40c	108.51 ± 3.58b	0.69 ± 0.02b
Qi319	+P	20.39 ± 0.14b	71.21 ± 5.57c	0.80 ± 0.03a
	-P	10.22 ± 0.39d	143.06 ± 2.29a	0.60 ± 0.01c

Three seedlings per bottle were cultured in phosphorus saturation solution (1000 μM KH₂PO₄) to the three-leaf stage, followed by low phosphate stress solution (5 μM KH₂PO₄) for an additional 25 days to the six–seven-leaf stage. Values represent the means of nine seedlings ± SD. Values with different letters within a row are significantly different (P < 0.05) by multiple comparison analysis