3.4 Effect of exogenous zinc on the synthesis of zinc
polysaccharide from Dendrobium nobile
It can be seen from Figure 6 that zinc polysaccharide varied with zinc
concentration and zinc treatment time. When the zinc concentration was
less than 800 μmol/L, the content of zinc polysaccharide increased with
the increase of zinc concentration. With the extension of zinc treatment
time, the content of zinc polysaccharide in each group decreased
gradually. Therefore, when the zinc concentration is 800 μmol/L and the
treatment time is 7 days, the content of zinc polysaccharide reaches the
maximum value, and there is significant difference compared with the
control.