Oxylipin pathway

Figure 8.6 A diagram of the oxylipin pathway. LOX lipoxygenase AOS allene oxide synthase HPL hydroperoxide lyase AOC allene oxide cyclase OPDA Reductase 12-oxo-phytodienoic acid-10,11-reductase.

Fig. 3 Biosynthetic pathways to pyrethrins. The identified enzymes involved in biosynthesis are shown in orange. Note that green leaf volatiles and the plant hormone jasmonic acid share the oxylipin pathway. The phosphate moiety is indicated as P ...

Falkowski PG, Katz ME, Knoll AH, Quigg A, Raven JA, Schofield O, Taylor FJR (2004) The evolution of modem eukaryotic phytoplankton. Science 305 354-360 Flynn KJ (2005) Castles built on sand dysfunctionality in plankton models and the inadequacy of dialogue between biologists and modellers. J Plankton Res 27 205-210 Fontana A (2007) Chemistry of oxylipin pathways in marine diatoms. Pure Appl Chem 79 481 490... 

Oxidative burst, and all associated responses in Chondrus crispus, including oxylipin pathway and VHOCs... 

Hamberg, M. Gardner, H.W. (1992) Oxylipin pathway to jasmonates biochemistry and biological significance. Biochim. Biophys. Acta, 1165(1), 1-18. 

Hamberg, M. and H. W. Gardner, Oxylipin pathway to jasmo-nates Biochemistry and biological significance, Biochem. Bio-phys. Acta, 1165, 1-18 (1992). 

The localization of enzymes of the oxylipin pathway has yet to be unequivocally elucidated. Nonetheless, LOX has been localized in plastids, vacuoles and the cytoplasm, e.g. [1], and in lipid bodies [36,37]. Since enzymes of the jasmonic acid biosynthetic pathway are thought to be localized mainly in plastids, mechanisms must exist to shuttle fatty acids released from the plasma membrane to the plastids. Furthermore, since p-oxidation of fatty acids normally occurs in peroxisomes, transport vesicles that carry the cargo between organelles may exist in plant cells. It is tempting to speculate that there could be fusion or mixing of compartments that contain either enzymes, fatty acids, and/or intermediate products, thus resulting in oxylipin biosynthesis. Intensive research is needed to address these questions as well as the cell-specific and the subcellular localization of oxylipin synthesis and the mechanisms that regulate this process. 

The initial step for the biosynthesis of jasmonic acid and of the other oxygenated fatty acids is the lipoxygenase catalyzed peroxygenation of linoleic or linolenic acid to give 9- or 13-hydroperoxy fatty acids. From these compounds the oxylipin pathway is diverged into 3 major routes ... 

Figure 2 Influence of metabolites of the oxylipin pathway on AOC activity...

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