Aquatic macrophytes, regardless of species, are natural occupants of rivers, lakes and hydroelectric reservoirs. The increase in the load of organic matter, mainly from untreated sewage, increases the availability of nutrients for these species which can grow disproportionately, becoming dominant species and altering the characteristics of the ecosystem. The best way to control macrophytes is to control the organic load. But that’s not necessarily the easiest way to do it. The mechanical removal of macrophytes is both complex and inefficient, as it attacks the symptom and not the cause. When we find a problem that physics and chemistry can’t solve, we try to solve it with a biotechnological approach. To do this, we want to sequence the genomes of the macrophyte species that infest Brazilian reservoirs