Figure 6.
Effects of Y1 filtrate on photosynthetic activity of A. pacificum. (a) maximal photosynthetic efficiency (Fv/Fm); (b) initial slope of the light limited region (alpha); (c) maximum relative photosynthetic electron transfer rate (rETRmax). Control cultures indicate algal cultures with 2% (v/v) 2216E medium addition; filtrate-added cultures indicate algal cultures with 2% (v/v) Y1 filtrate addition. Experiments were performed in triplicate. Error bars indicate the standard error. Statistical significances across control at the same time of sampling are indicated with an asterisk (p < 0.05).