@Article{IPB-2012, author = {Wasternack, C. and Hause, B.}, title = {{OPDA-Ile – a new JA-Ile-independent signal?}}, year = {2016}, pages = {e125364600}, journal = {Plant Signal Behav}, doi = {10.1080/15592324.2016.1253646}, url = {http://www.tandfonline.com/doi/full/10.1080/15592324.2016.1253646}, volume = {11}, abstract = {AbstractExpression takes place for most of the jasmonic acid (JA)-induced genes in a COI1- dependent manner via perception of its conjugate JA-Ile in the SCFCOI1-JAZ co-receptor complex. There are, however, numerous genes and processes, which are preferentially induced COI1-independently by the precursor of JA, 12-oxo-phytodienoic acid (OPDA). After recent identification of the Ile-conjugate of OPDA, OPDA-Ile, biological activity of this compound could be unequivocally proven in terms of gene expression. Any interference of OPDA, JA, or JA-Ile in OPDA-Ile-induced gene expression could be excluded by using different genetic background. The data suggest individual signaling properties of OPDA-Ile. Future studies for analysis of an SCFCOI1-JAZ co-receptor-independent route of signaling are proposed.} } @Article{IPB-1435, author = {Wasternack, C. and Goetz, S. and Hellwege, A. and Forner, S. and Strnad, M. and Hause, B.}, title = {{Another JA/COI1-independent role of OPDA detected in tomato embryo development.}}, year = {2012}, pages = {1349-1353}, journal = {Plant Signal Behav}, doi = {10.4161/psb.21551}, url = {http://www.tandfonline.com/loi/kpsb20}, volume = {7}, abstract = { Jasmonates (JAs) are ubiquitously occurring signaling compounds in plants formed in response to biotic and abiotic stress as well as in development. (+)-7-iso-jasmonoyl isoleucine, the bioactive JA, is involved in most JA-dependent processes mediated by the F-box protein COI1 in a proteasome-dependent manner. However, there is an increasing number of examples, where the precursor of JA biosynthesis, cis-(+)-12-oxophytodienoic acid (OPDA) is active in a JA/COI1-independent manner. Here, we discuss those OPDA-dependent processes, thereby giving emphasis on tomato embryo development. Recent data on seed coat-generated OPDA and its role in embryo development is discussed based on biochemical and genetic evidences.} } @Article{IPB-1187, author = {Wasternack, C. and Xie, D.}, title = {{The genuine ligand of a jasmonic acid receptor: Improved analysis of jasmonates is now required.}}, year = {2010}, pages = {337-340}, journal = {Plant Signal Behav}, doi = {10.4161/psb.5.4.11574}, url = {https://dx.doi.org/10.4161/psb.5.4.11574}, volume = {5}, abstract = {Jasmonic acid (JA), its metabolites, such as the methyl ester or amino acid conjugates as well as its precursor 12-oxophytodienoic acid (OPDA) are lipid-derived signals. JA, OPDA and JA-amino acid conjugates are known to function as signals in plant stress responses and development. More recently, formation of JA-amino acid conjugates and high biological activity of JA-Isoleucine (JA-Ile) were found to be essential in JA signaling. A breakthrough was the identification of JAZ proteins which interact with the F-box protein COI1 if JA-Ile is bound. This interaction leads to proteasomal degradation of JAZs being negative regulators of JA-induced transcription. Surprisingly, a distinct stereoisomer of JA-Ile, the (+)-7-iso-JA-Ile [(3R,7S) form] is most active. Coronatine, a bacterial phytotoxine with an identical stereochemistry at the cyclopentanone ring, has a similar bioactivity. This was explained by the recent identification of COI1 as the JA receptor and accords well with molecular modeling studies. Whereas over the last two decades JA was quantified to describe any JA dependent process, now we have to take into account a distinct stereoisomer of JA-Ile. Until recently a quantitative analysis of (+)-7-iso-JA-Ile was missing presumable due to its equilibration to (−)-JA-Ile. Now such an analysis was achieved. These aspects will be discussed based on our new knowledge on JA perception and signaling.} } @Article{IPB-781, author = {Delker, C. and Stenzel, I. and Hause, B. and Miersch, O. and Feussner, I. and Wasternack, C.}, title = {{Jasmonate Biosynthesis in Arabidopsis thaliana - Enzymes, Products, Regulation}}, year = {2006}, pages = {297-306}, journal = {Plant Biol.}, doi = {10.1055/s-2006-923935}, url = {http://onlinelibrary.wiley.com/doi/10.1055/s-2006-923935/abstract}, volume = {8}, abstract = {Among the plant hormones jasmonic acid and related derivatives are known to mediate stress responses and several developmental processes. Biosynthesis, regulation, and metabolism of jasmonic acid in Arabidopsis thaliana are reviewed, including properties of mutants of jasmonate biosynthesis. The individual signalling properties of several jasmonates are described.} } @Article{IPB-701, author = {Wasternack, C. and Stenzel, I. and Hause, B. and Hause, G. and Kutter, C. and Maucher, H. and Neumerkel, J. and Feussner, I. and Miersch, O.}, title = {{The wound response in tomato - Role of jasmonic acid}}, year = {2006}, pages = {297-306 }, journal = {J. Plant Physiol}, doi = {10.1016/j.jplph.2005.10.014}, volume = {163}, } @INBOOK{IPB-415, author = {Feussner, I. and Balkenhohl, T. and Porzel, A. and Kühn, H. and Wasternack, C.}, title = {{Natural Product Analysis}}, year = {1998}, pages = {57-58}, chapter = {{Structural elucidation of oxygenated triacylglycerols in cucumber and sunflower cotyledons}}, journal = {P. Vieweg, Wiesbaden}, editor = {Schreier, P., Herderich, M., Humpf, H.-U., Schwab, W.}, } @INBOOK{IPB-416, author = {Kohlmann, M. and Kuntzsch, A. and Wasternack, C. and Feussner, I.}, title = {{Natural Product Analysis}}, year = {1998}, pages = {339-340}, chapter = {{Effect of jasmonic acid methyl ester on enzymes of the lipoxygenase pathway in barley leaves}}, journal = {P. Vieweg, Wiesbaden}, editor = {Schreier, P., Herderich, M., Humpf, H.-U., Schwab, W.}, } @Article{IPB-375, author = {Kogel, K.-H. and Ortel, B. and Jarosch, B. and Atzorn, R. and Schiffer, R. and Wasternack, C.}, title = {{Resistance in barley against the powdery mildew fungus (Erysiphe graminis f. sp. hordei) is not associated with enhanced levels of endogenous jasmonates}}, year = {1995}, pages = {319-332}, journal = {Eur. J. Plant Pathol.}, volume = {101}, }