FIGURE LEGENDS
Figure 1 . Location of the five study sites.
Figure 2 .Box plots of twig water potential in Haloxylon
ammodendron across five sites differing in depth-to-groundwater (DGW)
at early (EGS) and late (LGS) growing season. The global assessment of a
statistical difference among the sites with different DGW was conducted
using ANOVA. Different letters represent significant differences among
different DGWs as assessed using Tukey’s HSD test (P <
0.05).
Figure 3 .Twig water potential in Haloxylon ammodendronbetween the early (EGS) and late growing season (LGS) with the same
depth-to-groundwater (DGW). To compare the difference between twig water
potential in the EGS and LGS at every site with contrasting DGW,
independent-samples t -tests were used.
Figure 4. Relationships between twig water potential and
depth-to-groundwater (DGW) of Haloxylon ammodendron in early
growing season (EGS; a, c and e) and late growing season (LGS; b, d and
f). Blue lines indicate linear trends of DGW changes of turgor pressure,
and shallow blue bands represent 95% confidence intervals.
Figure 5. Twig water relation traits in Haloxylon
ammodendron across five sites differing in depth-to-groundwater (DGW)
at early (EGS; a and c) and late (LGS; b and d) growing season. The
global assessment of a statistical difference among the sites with
different DGW was conducted by ANOVA. Different letters represent
significant differences among the different DGWs as assessed using
Tukey’s HSD test (P < 0.05).
Figure 6. Relationships between twig P-V parameters and
depth-to-groundwater (DGW) of Haloxylon ammodendron in the early
growing season (EGS; a and c) and late growing season (LGS; b and d).
Values are means ± SEs (n = 5).
Figure 7. Seasonal changes in leaf area per branch (a) and
growth rate of branch area (b) of Haloxylon ammodendron at five
sites with different depth-to-groundwater (DGW). Error bars represent
standard errors of means. Asterisks (*) indicate significant differences
among the five sites with different DGWs on the same trial day or during
the same growth period at P = 0.05.
Figure 8. Relationship between growth rates, Huber values, and
depth-to-groundwater (DGW) of Haloxylon ammodendron during the
early growing season (EGS; a and c) and the late growing season (LGS; b
and d). Blue lines indicate linear trends of DGW changes of growth rate
and HV, and shallow blue bands represent 95% confidence intervals.
Figure 9 . Relationship between soluble sugars and full turgor
(π 100; a and b), betweenπ 100 and growth rate (c and d), and between
growth rate and Huber value (e and f) of Haloxylon ammodendronduring the early growing season (EGS; a, c and e) and the late growing
season (LGS; b, d and f). Values are means ± SEs (n = 5–10). Blue lines
indicate linear trends between soluble sugar and full turgor, between
full turgor and growth rate, and between growth rate and Huber Value.
Dashed blue lines represent 95% confidence intervals of linear
trendlines.