BBE-like enzymes in plant physiology play a role in primary metabolism catalyzed by members of this family. The oxidation of a variety of alcohol groups supplies a first understanding of the origin of the BBE-like enzyme family, present in reactions like oxidation of mono and polysaccharides. It seems that they are present in a huge percentage of plants.
A common reaction of BBE-like enzymes from plants is the oxidation of carbohydrates at the anomeric center to the appropriate lactones. A member of these enzymes is hexose oxidase (HOX) from Chondrus crispus, a red algae that belongs to the division of Rhodophyta. But is more related to bacterial BBE-like enzymes than to members present in plants.
Other example of carbohydrate oxidizing BBE-like enzyme is nectarin V (Nec5) from tobacco. Its function is to convert glucose to gluconolactone. Nec5 is related with the pathogen defense system of plants, because it protects reproductive organelles.
Another function of this class of enzymes in plants is Defense response homeostasis. BBE-like enzymes play a key role as oligosaccharide oxidases, reducing the activity of olygogalacturonanes (fragments of pectin)  and oligocellobiose (fragments of cellulose) as DAMPS.