FIGURE 5 Content of total polysaccharides secreted by roots in
culture media. (a), (b), and (c) respectively represent the changes in
polysaccharide content under the superimposed environmental factors of
nitrogen, phosphorus and nitrogen-phosphorus deficit stress. (d)
indicates the changes in polysaccharide content under superimposed
drought and high temperature. * indicating a significant difference to
the N, P, NP, D, and CK treatment, p < 0.05.