. 2016 Aug 2;17(8):1251. doi: 10.3390/ijms17081251

Table 1.

Effects of drought treatments on physiological properties of switchgrass.

Treatment		Control	Drought
Soil Water Tension (MPa)		0.00 ± 0.00 ^A,†	0.08 ± 0.02 ^B,†
Leaf Relative Water Content		77.35 ± 0.01 ^A	71.08 ± 0.02 ^B
Plant Height (cm)	0 Day drought treatment	18.31 ± 6.18 ^A	19.08 ± 4.97 ^A
	20 days drought treatment	43.26 ± 9.11 ^A	39.75 ± 8.49 ^B
	Relative plant height	24.96 ± 6.21 ^A	20.67 ± 6.22 ^B
Photosynthesis	Leaf photosynthetic rate (μmol CO₂/m²/s)	22.96 ± 3.22 ^A	21.69 ± 7.17 ^A
	Stomatal conductance (mol H₂O/m²/s)	0.138 ± 0.03 ^A	0.125 ± 0.05 ^B
	Transpiration rate (mmol H₂O/m⁻²/s)	6.88 ± 1.11 ^A	6.09 ± 2.15 ^B
	Water use efficiency (μmol CO₂/mmol H₂O)	3.35 ± 0.20 ^A	3.59 ± 0.25 ^B

Data for all the measurements except plant height were collected after 20 days of the water withholding treatments. Data are presented as means ± standard deviations (SD) of four independent replicates. Within columns, means followed by the same letter are not significantly different (p < 0.01). Leaf relative water content (W_r) was calculated using the following equation: $W_{r} = (W_{f} - W_{d}) / W_{f}$ , where fresh weight ( $W_{f}$ ) was taken immediately after harvest, and dry weight was measured after drying tissues at 70 °C for three days until a constant dry weight ( $W_{d}$ ). Plant height was measured from the bottom of the tiller (start point) to the top of the latest node (end point). ^† Means within columns followed by the same letter are not different at the 1% level.