Note
Main effects and interactions of light and temperature on rates of nitrate uptake and levels of pigments and chemical constituents of the red seaweed Gracilaria tikvahiae were investigated in outdoor, nutrient-replete continuous-flow seawater culture chambers. Light intensity was the more important factor regulating levels of chlorophyll-a (Chl-a), R-phycoerythrin (R-PE) and %N all of which varied inversely with light. Temperature was the more important factor regulating levels of protein, carbohydrate, and %C, all of which varied inversely with temperature.