Utah State University
Plants have more than 100 copper-containing proteins. About half of the Cu in plants is in the chloroplast, bound to plastocyanin, where it helps absorb oxygen radicals. Cu is considered adequate in solution at 2 to 4 μM (0.03 to 0.06 ppm). The requirement for Cu is so low that it can sometimes be supplied from contamination. The effect of higher levels is not well studied. Here we report the effect of Cu at 0, 4, and 8 μM (0, 0.06, and 0.13 ppm Cu) in tomato (Solanum lycopersicum) in a deep-flow hydroponics system.
Langenfeld, Noah; Rhodes, Saundra; and Bugbee, Bruce, "Deep-Flow Hydroponic Culture: Copper Toxicity at 8 μM (0.13 ppm) in Tomato" (2021). Hydroponics/Soilless Media. Paper 8.