AQUATIC PLANT GLYCOLYSIS. “With two fructose-bisphosphate aldolase enzymes and a malate dehydrogenase, the list of PSGs contains three enzymes of the glycolysis pathway. This observation may be particularly significant due to the challenges imposed by the O2 sink created by the reductive sediment leading to compensation by internal transport of oxygen from shoot to root tissues during the day cycle.” (PSG = positively selected genes).
http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8