|
Faculty Jurgen Engelberth, Ph.D. Education Ph.D. (Plant Physiology, Ruhr University, Bochum, Germany) Research Interests Plants under insect herbivore attack have evolved various mechanisms to counteract this threat. Among the measures plants undertake to survive with the least damage are the recognition of insect-derived elicitors, production of proteins, that block digestion or disrupt intestinal tissue, and the production of defense-related secondary metabolites, which directly or indirectly affect the herbivore performance. Lipid-derived compounds (oxylipins), which are activated by elicitors from the insect saliva, represent important signals in this process. However, little is known about the regulation of the pathway leading to the production of jasmonic acid (JA), the most important signal in plant defense against herbivorous insects. The discovery of green leafy volatiles as another center of signaling added a new dimension to this pathway. The significance of this pathway is not limited to defense-related functions, but plays also an important role in developmental processes. The enlightenment of these pathways is a major aspect of my research. Besides the metabolic analysis of possible signaling compounds the molecular regulation of these processes are the major subjects in my research program. Recent Publications Tumlinson, J. H., and Engelberth, J. (2008) Fatty acid derived signals that induce or regulate plant defenses against herbivory. In: A. Schaller [ed.], Induced plant resistance to herbivory, Springer, Amsterdam, The Netherlands (in press). Xiquan, G., Starr, J., Göbel, C., Engelberth, J., Feussner, I., Tumlinson, J., and Kolomiets, M. (2007) Maize 9-lipoxygenase ZmLOX3 controls development, root-specific expression of defense genes and resistance to root-knot nematodes. Mol. Plant Microbe Interact. 21, 98-109. Engelberth, J., Seidl-Adams, I., Schultz, Jack C., Tumlinson, J.H. (2007) Insect elicitors and exposure to green leafy volatiles (GLV) differentially up-regulate major octadecanoids and transcripts of 12-oxo phytodienoic acid reductases in Zea mays. Mol. Plant Microbe Interact. 20, 707-716. HUANG, J., SCHMELZ, E.A., ALBORN, H., ENGELBERTH, J., TUMLINSON, J.H. (2005) Phytohormones mediate volatile emission during the interaction of compatible and incompatible pathogens: the role of ethylene in Pseudomonas syringae infected tobacco. J. Chem. Ecol. 31, 439-539. SCHMELZ, E.A., ENGELBERTH, J., TUMLINSON, J.H., ALBORN, H.T. (2004) The use of vapor phase extraction in metabolic profiling of phytohormones and other metabolites. Plant Journal 39 (5), 790-808. Engelberth, J., ALBORN, H.T., SCHMELZ, E.A., Tumlinson, J.H. (2004) Airborne signals prime plants against insect herbivore attack. PNAS 101, 1781-1785. SCHMELZ, E.A., ALBORN, H.T., ENGELBERTH, J., TUMLINSON, J.H. (2003) Nitrogen deficiency increases volicitin-induced volatile emission, ethylene sensitivity, and jasmonic acid accumulation in Zea mays. Plant Physiology 133, 295-306. ENGELBERTH, J. (2003) Mechanosensing and Signaltransduction in Tendrils. Advances in Space Research 32/8, 1611-1619. SCHMELZ, E.A., ENGELBERTH, J., ALBORN, H.T., O´DONNEL, P., SAMMONS, M., TOSHIMA, H., TUMLINSON, J.H. (2003) Simultaneous analysis of phytohormones, phytotoxins, and volatile organic compounds in plants. PNAS 100, 10552-10557. HUANG, J., CARDOZA, Y.J., SCHMELZ, E.A., RAINA, R., ENGELBERTH, J., TUMLINSON, J.H. (2003) Differential volatile emission and salicylic acid levels from tobacco plants in response to different strains of Pseudomonas syringae. Planta 217, 767-775. Engelberth, J., Schmelz, E.A., Alborn, H., Cardoza, Y.J., Huang, J., TUMLINSON, J.H. (2003) Simultaneous Quantification of Jasmonic acid and Salicylic acid by Vapor Phase Extraction and Gas Chromatography - Chemical Ionization-Mass Spectrometry, Analytical Biochemistry 312, 242-250.
|
