Figure 2.

Glucosinolates and benzoxazinoids as examples of secondary metabolites that blurr the functional trichotomy of plant metabolism. Different functions of glucosinolates in Arabidopsis and benzoxazinoids in maize and wheat are depicted. Genes that are known to be involved in the different functions are indicated. Note that a direct role of benzoxazinoids and glucosinolates as plant primary metabolites (for instance, in the context of nitrogen/sulfur and/or energy storage) has not been clearly demonstrated so far. *MEDs and KFBs are likely regulated by aldoxime precursors of glucosinolates. For references, see the article.