Regulation of oleoresinosis in grand fir (Abies grandis). Differential transcriptional control of monoterpene, sesquiterpene, and diterpene synthase genes in response to wounding

Plant Physiology
C L SteeleR Croteau

Abstract

Grand fir (Abies grandis Lindl.) has been developed as a model system for the study of wound-induced oleoresinosis in conifers as a response to insect attack. Oleoresin is a roughly equal mixture of turpentine (85% monoterpenes [C10] and 15% sesquiterpenes [C15]) and rosin (diterpene [C20] resin acids) that acts to seal wounds and is toxic to both invading insects and their pathogenic fungal symbionts. The dynamic regulation of wound-induced oleoresin formation was studied over 29 d at the enzyme level by in vitro assay of the three classes of synthases directly responsible for the formation of monoterpenes, sesquiterpenes, and diterpenes from the corresponding C10, C15, and C20 prenyl diphosphate precursors, and at the gene level by RNA-blot hybridization using terpene synthase class-directed DNA probes. In overall appearance, the shapes of the time-course curves for all classes of synthase activities are similar, suggesting coordinate formation of all of the terpenoid types. However, closer inspection indicates that the monoterpene synthases arise earlier, as shown by an abbreviated time course over 6 to 48 h. RNA-blot analyses indicated that the genes for all three classes of enzymes are transcriptionally activated in respon...Continue Reading

References

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Citations

Nov 23, 2006·Applied Microbiology and Biotechnology·Sydnor T Withers, Jay D Keasling
Mar 24, 2000·Plant Science : an International Journal of Experimental Plant Biology·F H Shah, T S Cha
May 14, 1999·Trends in Plant Science·M A Phillips, R B Croteau
Jun 27, 2002·European Journal of Biochemistry·Joost LückerHarrie A Verhoeven
May 5, 2001·Annual Review of Plant Physiology and Plant Molecular Biology·Susan Trapp, Rodney Croteau
Jun 13, 2002·Physiologia Plantarum·Robert Josef FischbachJörg-Peter Schnitzler
Jul 7, 2005·The New Phytologist·Vincent R FranceschiTrygve Krekling
Dec 14, 2006·The Plant Journal : for Cell and Molecular Biology·John C D'AuriaJonathan Gershenzon
Apr 18, 2008·The Journal of Organic Chemistry·Fraser F FlemingOmar W Steward
Nov 24, 1999·Archives of Biochemistry and Biophysics·M A PhillipsR Croteau
Feb 1, 2007·Journal of Agricultural and Food Chemistry·Zhigang LiHyun-Jin Kim
Mar 16, 2006·Journal of Agricultural and Food Chemistry·Hyun-Jin KimNihal C Rajapakse

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