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Wasternack, C. & Feussner, I. The oxylipin pathways: biochemistry and function. Annu Rev Plant Biol (2018) DOI: 10.1146/annurev-arplant-042817-040440

Plant oxylipins form a constantly growing group of signaling molecules that comprise oxygenated fatty acids and metabolites derived therefrom. In the last decade, the understanding of biosynthesis, metabolism, and action of oxylipins, especially jasmonates, has dramatically improved. Additional mechanistic insights into the action of enzymes and insights into signaling pathways have been deepened for jasmonates. For other oxylipins, such as the hydroxy fatty acids, individual signaling properties and cross talk between different oxylipins or even with additional phytohormones have recently been described. This review summarizes recent understanding of the biosynthesis, regulation, and function of oxylipins.
Publikation

Floková, K., Feussner, K., Herrfurth, C., Miersch, O., Mik, V., Tarkowská, D., Strnad, M., Feussner, I., Wasternack, C. & Novák, O. A previously undescribed jasmonate compound in flowering Arabidopsis thaliana – The identification of cis-(+)-OPDA-Ile. Phytochemistry 122, 230-237, (2016) DOI: 10.1016/j.phytochem.2015.11.012

Jasmonates (JAs) are plant hormones that integrate external stress stimuli with physiological responses. (+)-7-iso-JA-L-Ile is the natural JA ligand of COI1, a component of a known JA receptor. The upstream JA biosynthetic precursor cis-(+)-12-oxo-phytodienoic acid (cis-(+)-OPDA) has been reported to act independently of COI1 as an essential signal in several stress-induced and developmental processes. Wound-induced increases in the endogenous levels of JA/JA-Ile are accompanied by two to tenfold increases in the concentration of OPDA, but its means of perception and metabolism are unknown. To screen for putative OPDA metabolites, vegetative tissues of flowering Arabidopsis thaliana were extracted with 25% aqueous methanol (v/v), purified by single-step reversed-phase polymer-based solid-phase extraction, and analyzed by high throughput mass spectrometry. This enabled the detection and quantitation of a low abundant OPDA analog of the biologically active (+)-7-iso-JA-L-Ile in plant tissue samples. Levels of the newly identified compound and the related phytohormones JA, JA-Ile and cis-(+)-OPDA were monitored in wounded leaves of flowering Arabidopsis lines (Col-0 and Ws) and compared to the levels observed in Arabidopsis mutants deficient in the biosynthesis of JA (dde2-2, opr3) and JA-Ile (jar1). The observed cis-(+)-OPDA-Ile levels varied widely, raising questions concerning its role in Arabidopsis stress responses.

Publikation

Wasternack, C. & Feussner, I. Multifunctional enzymes in oxylipin metabolism Chembiochem. 9, 2373-2375, (2008)

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Gao, X., Stumpe, M., Feussner, I. & Kolomiets, M. A novel plastidial lipoxygenase of maize (Zea mays) ZmLOX6 encodes for a fatty acid hydroperoxide lyase and is uniquely regulated by phytohormones and pathogen infection Planta 227, 491-503, (2008)

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Sharma, V.K., Monostori, T., Göbel, C., Hänsch, R., Bittner, F., Wasternack, C., Feussner, I., Mendel, R.R., Hause, B. & Schulze, J. Transgenic barley plants overexpressing a 13-lipoxygenase to modify oxylipin signature Phytochemistry 67, 264-276, (2006)

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Wasternack, C., Stenzel, I., Hause, B., Hause, G., Kutter, C., Maucher, H., Neumerkel, J., Feussner, I. & Miersch, O. The wound response in tomato Role of jasmonic acid J. Plant Physiol. 163, 297-306, (2006)

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Stumpe, M., Carsjens, J.G., Stenzel, I., Göbel, C., Lang, I., Pawlowski, K., Hause, B. & Feussner, I. Lipid metabolism in arbuscular mycorrhizal roots of Medicago truncatula Phytochemistry 66, 781-791, (2005)

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Gerhard, B., Fischer, K., Balkenhohl, T.J., Pohnert, G., Kühn, H., Wasternack, C. & Feussner, I. Lipoxygenase-mediated metabolism of storage lipids in germinating sunflower cotyledons and b-oxidation of (9Z,11E,13S)-13-hydroxy-octadeca-9,11-dienoic acid by the cotyledonary glyoxysomes Planta 220, 919-930, (2005)

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Sharma, V.K., Monostori, T., Hause, B., Maucher, H., Göbel, C., Hornung, E., Hänsch, R., Bittner, F., Wasternack, C., Feussner, I., Mendel, R.R. & Schulze, J. Genetic transformation of barley to modify expression of a 13-lipoxygenase Acta Biol. Szegediensis 49, 33-34, (2005)

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Miersch, O., Weichert, H., Stenzel, I., Hause, B., Maucher, H., Feussner, I. & Wasternack, C. Constitutive overexpression of allene oxide cyclase in tomato (Lycopersicon esculentum cv. Lukullus) elevates levels of jasmonates and octadecanoids in flower organs but not in leaves Phytochemistry 65, 847-856, (2004)

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