N. minor exudates significantly inhibited the growth of M. aeurginosa, A. flos-aquae and S. obliquus in a concentration- dependent manner (Fig. 1). The maximal growth inhibition was achieved at the exudate concentration of 1.0% (correspondent to
5.0 g/L N. minor living weight) on day 7, with IRs being 94.1%, 88.0% and 26.9% for M. aeurginosa (Fig. 1A), A. flos-aquae (Fig. 1B), and S. obliquus (Fig. 1C), respectively. The EC50 on the seventh day for M. aeurginosa and A. flos-aquae were 0.29% and 0.34% of N. minor exu- dates (correspondent to 1.5 g/L and 1.7 g/L N. minor living weight). In contrast, N. minor exudates at these concentrations had no significant effect on C. pyrenoidosa (Fig. 1D). The detailed data on day 7 was listed in Table 1, in which the IRs for each concentra- tion of N. minor exudate (from 0.2% to 1.0%) were included.