Effect of Nitrogen and Periphyton Extract on the Growth of Nostoc sphaericum in Cultures
Table 2
Culture conditions for treatments and replicates of the experiment. The cultures were established during 10 weeks for a total of 135 Petri dishes inoculated with N. sphaericum.
ā
Solid medium free of nitrogen and free of, or combined with, periphyton extract
Solid medium with excessive nitrogen content and free of, or combined with, periphyton extract.
Solid medium moderated in nitrogen content and free of, or combined with, periphyton extract