Figure 1.

Biosynthetic pathways of the major volatile compound classes and selected examples of volatiles from these classes that are discussed in this review. Fatty acid‐derived VOCs (including GLVs and methyljasmonate) are produced from C18 fatty acids, produced through the acetate pathway that gets its substrate, acetyl‐coA, from glycolysis (Fu et al., 2017). Acetyl‐coA from glycolysis is also the substrate for the cytosolic mevalonic acid (MVA) pathway, while pyruvate from glycolysis is the substrate for the plastidic methylerythritol phosphate (MEP) pathway (Beyraghdar Kashkooli et al., 2018; Pichersky and Raguso, 2018). The benzenoids and phenylpropanoids are produced through the shikimate pathway that gets its substrates from glycolysis and the pentose phosphate pathway (Widhalm et al., 2015; Santos‐Sánchez et al., 2019).