Variation in organic solutes and inorganic ions
Growth
stage was significant (P =0.097) in the relationship between DGW
and soluble sugars (F =7.64, P <0.01). There were
no correlation between soluble sugar concentrations and increasing DGW
during both EGS and LGS. Concentrations of soluble sugars in the
assimilation branches of H. ammodendron were lower at the
shallowest DGW site compared to the deepest DGW site during both growth
stages. The concentrations of soluble sugars in the assimilation
branches within the shallowest site were also significantly different
between the EGS and LGS (Table 1). Growth stage significantly affected
DGW and starch (F =13.65, P <0.001). There were no
correlations between starch concentration and increasing DGW during
either EGS or LGS. Starch concentrations were significantly different
among sites having contrasting DGW levels. Starch concentrations were
high at the site with the shallowest DGW compared to the site with the
deepest DGW (Table 1). Growth stage was significant in the relationship
between DGW and proline (F =13.52, P <0.001).
There were no correlation between proline and increasing DGW during
either EGS or LGS. Proline during the whole growth season ranged between
10.44 ± 1.34 and 1.70 ± 0.08 (Table 1). Season had significant influence
on the relationship between DGW and Na+ concentration
(F =37.40, P <0.001). Na+concentration was higher during LGS than EGS (Table 1). There were no
trends between Na+ and DGW during EGS or LGS.