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Publikationen - Molekulare Signalverarbeitung

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Publikation

Mur, L.A.J., Kenton, P., Atzorn, R., Miersch, O. & Wasternack, C. The outcomes of concentration specific interactions between salicylate and jasmonate signaling include synergy, antagonism and the activation of cell death Plant Physiol. 140, 249-262, (2006)

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Publikation

Kramell, R., Miersch, O., Atzorn, R., Parthier, B. & Wasternack, C. Octadecanoid-derived alteration of gene expression and the 'oxylipin signature' in stressed barley leaves - implications for different signalling pathways Plant Physiol. 123, 177-186, (2000)

Stress-induced gene expression in barley (Hordeum vulgare cv. Salome) leaves has been correlated with temporally changing levels of octadecanoids and jasmonates, quantified by means of gas chromatography/mass spectrometry-single ion monitoring. Application of sorbitol-induced stress led to a low and transient rise of jasmonic acid (JA), its precursor 12-oxophytodienoic acid (OPDA) and the methyl esters JAME and OPDAME, respectively, followed by a large increase in their levels. JA and JAME peaked between 12 and 16 h, about 4 hours before OPDA and OPDAME. However, OPDA accumulated up to a 2.5-fold higher level than the other compounds. Dihomo-jasmonic acid and 9,13-didehydro-12- oxophytoenoic acid were identified as minor components. Kinetic analyses revealed that a transient threshold of jasmonates or octadecanoids is necessary and sufficient to initiate JA responsive gene expression. Although OPDA and OPDAME applied exogenously were metabolized to JA in considerable amounts, both of them can induce gene expression per se as evidenced by those genes which do not respond to endogenously formed JA. Also, coronatine induces JA-responsive genes independently from endogenous JA. As evidenced by application of deuterated JA, endogenous synthesis of JA is not induced by JA treatment. The data are discussed in terms of distinct signalling pathways.
Publikation

Kenton, P., Mur, L.A.J., Atzorn, R., Wasternack, C. & Draper, J. ()-Jasmonic acid accumulation in tobacco hypersensitive response lesions Mol. Plant Microbiol. Interactions 12, 74-78, (1999) DOI: org/10.1094/MPMI.1999.12.1.74

Tobacco infected with Pseudomonas syringae pv. phaseolicola undergoes a hypersensitive response (HR). Jasmonic acid (JA) accumulated within the developing lesion 3 to 9 h after infection and this accumulation preceded protein loss, cell death, and malondialdehyde accumulation. Accumulating JA consisted largely of the (—)-JA stereoisomer and was essentially restricted to the HR lesion

Publikation

Wasternack, C., Atzorn, R., Pena-Cortes, H. & Parthier, B. Alteration of gene expression by jasmonate and ABA in tobacco and tomato J. Plant Physiol. 147, 503-510, (1996)

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Publikation

Herde, O., Atzorn, R., Fisahn, J., Wasternack, C., Willmitzer, L. & Peña-Cortés, H. Localized wounding by heat initiates the accumulation of proteinase inhibitor II in abscisic acid-deficient plants by triggering jasmonic acid biosynthesis Plant Physiol. 112, 853-860, (1996)

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Publikation

O'Donnell, P.J., Calvert, C., Atzorn, R., Wasternack, C., Leyser, H.M.O. & Bowles, D.J. Ethylene as a signal mediating the wound response of tomato plants Science 274, 1914-1917, (1996)

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Publikation

Peña-Cortés, H., Prat, S., Atzorn, R., Wasternack, C. & Willmitzer, L. Pin2 gene expression in potato and tomato detached leaves from ABA-deficient potato and tomato plants upon systemin treatment Planta 198, 447-451, (1996)

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Publikation

Lehmann, J., Atzorn, R., Brückner, C., Reinbothe, S., Leopold, J., Wasternack, C. & Parthier, B. Accumulation of jasmonate, abscisic acid, specific transcripts and proteins in osmotically stressed barley leaf segments Planta 197, 156-162, (1995)

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Publikation

Kramell, R., Atzorn, R., Schneider, G., Miersch, O., Brückner, C., Schmidt, J., Sembdner, G. & Parthier, B. Occurrence and identification of jasmonic acid and its amino acid conjugates induced by osmotic stress in barley leaf tissue J. Plant Growth Reg. 14, 29-36, (1995)

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Publikation

Harms, K., Atzorn, R., Brash, A., Kühn, H., Wasternack, C., Willmitzer, L. & Peña-Cortés, H. Expression of a flax allene oxide synthase cDNA leads to an increase in the endogenous jasmonic acid level in transgenic potato plants but not to a corresponding activation of jasmonic acid-responding genes The Plant Cell 7, 1645-1654, (1995)

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