Fig. 1 Changes of available phosphorus concentrations and pH value by Trichoderma asperellum Q1 at various forms of phosphate sources in Pikovskaya’s broth with time courses. CK
indicates the control groups without inoculation in the figure. The phosphate sources are tricalcium phosphate (TCP, A), dibasic calcium phosphate (DCP, B), and calcium phytate (C).
Error bar is SD. The experiments were repeated three times. The same as in Fig. 2.
very small only from 7.0 (initial value) to 6.30 (the lowest), and the content of soluble phosphates in supernatant of culture medium containing calcium phytate were much lower
than those of inorganic phosphate, even the production of available phosphorus could be negligible in inoculated samples comparing with uninoculated samples (Fig. 1-C).