Author(s)

Harold W. Gardner^*

Wild Edges Nature Preserve, Carlisle, PA, USA (formerly ARS, USDA).

It is demonstrated that (3Z)-nonenal (NON) and (3Z)-hexenal (HEX) are oxidized in a cascade by lipoxygenase (LOX) and hydroperoxide peroxygenase (HP peroxygenase) into (2E)-4-hydroxy-2- nonenal (HNE) and (2E)-4-hydroxy-2-hexenal (HHE), respectively. In turn, HNE inactivates LOX terminating the cascade. The hydroxy-alkenals produced serve to inhibit plant pathogens, which initiated the cascade. In addition to LOX, other unknown oxygenases may be involved in the cascade.

(3Z)-Nonenal, (3Z)-Hexenal, (2E)-4-Hydroxy-2-nonenal, (2E)-4-Hydroxy-2-hexenal, (2E)-4-Hydroperoxy-2-hexenal, Lipoxygenase, Hydroperoxide Peroxygenase, Hydroperoxide Lyase, (2E)-4-Hydroperoxy-2-Nonenal, 3, 4-Epoxynonanal, (2E)-4-Oxo-2-nonenal, Glycine max, Vica faba, Plant Pathogen

Gardner, H. (2016) Formation of (2E)-4-Hydroxy-2-nonenal and (2E)-4-Hydroxy-2-hexenal by Plant Enzymes: A Review Suggests a Role in the Physiology of Plants. Advances in Enzyme Research, 4, 56-61. doi: 10.4236/aer.2016.42006.