FIGURE 3 The root system secretes phosphotransferase activity
in the culture medium. (a), (b), and (c) respectively represent the
changes in phosphotransferases under the superimposed environmental
factors of nitrogen, phosphorus and nitrogen-phosphorus deficit stress.
(d) indicates the changes in phosphotransferase under the superposition
of drought and high temperature. * indicating a significant difference
to the N, P, NP, D, and CK treatment, p < 0.05.