Table 2.

Comparison of measured parameters among three sex morphs of Oxyria sinensis under three different drought treatments (soil water at 80% of maximal field capacity (FC), 50% FC, and 20% FC).

	Drought treatments (% of maximum FC)
	Low stress	Moderate stress	High stress
Variable and species	80% FC	50% FC	20% FC
Maximal rate of photosynthesis (Amax) (μmol m−2 s−1)
Male	15.41 ± 0.94 A,X	15.02 ± 1.56 A,X	11.16 ± 0.83 A,Y
Female	13.51 ± 0.99 A,XY	14.31 ± 0.45 A,X	11.79 ± 0.88 AB,Y
Hermaphrodite	14.32 ± 0.85 A,X	14.74 ± 1.38 A,X	13.58 ± 0.26 B,X
Stomatal conductance (g) (mmol m−2 s−1)
Male	0.53 ± 0.11 A,X	0.61 ± 0.12 A,X	0.25 ± 0.04 A,Y
Female	0.36 ± 0.09 A,X	0.46 ± 0.02 A,X	0.28 ± 0.05 A,X
Hermaphrodite	0.50 ± 0.12 A,XY	0.62 ± 0.09 A,X	0.34 ± 0.04 A,Y
Transpiration (E) (mmol m−2 s−1)
Male	3.72 ± 0.47 A,XY	4.40 ± 0.37 A,X	2.80 ± 0.35 A,Y
Female	3.11 ± 0.52 A,X	3.96 ± 0.11 A,X	2.99 ± 0.44 A,X
Hermaphrodite	3.76 ± 0.54 A,X	4.59 ± 0.38 A,X	3.78 ± 0.31 A,X
Instantaneous water-use efficiency (WUEi) (Amax/E)
Male	4.36 ± 0.49 A,X	3.42 ± 0.28 A,X	4.21 ± 0.50 A,X
Female	4.62 ± 0.44 A,X	3.61 ± 0.11 A,X	4.26 ± 0.56 A,X
Hermaphrodite	4.08 ± 0.49 A,X	3.21 ± 0.11 A,X	3.71 ± 0.36 A,X
Maximum quantum yield of PS II (Fv/Fm)
Male	0.82 ± 0.007 A,X	0.83 ± 0.002 A,X	0.83 ± 0.002 A,X
Female	0.82 ± 0.004 A,X	0.83 ± 0.002 A,X	0.83 ± 0.004 A,X
Hermaphrodite	0.83 ± 0.005 A,X	0.83 ± 0.003 A,X	0.83 ± 0.005 A,X

Values are mean ± SE.

Different letters after values indicate significant differences (P < 0.05) among different drought treatments (X, Y, Z) and different sex morphs (A, B).