title: Increased and altered fragrance of tobacco plants after metabolic engineering using three monoterpene synthases from lemon.
abstract: Wild-type tobacco (Nicotiana tabacum) plants emit low levels of terpenoids, particularly from the flowers. By genetic modification of tobacco cv Petit Havana SR1 using three different monoterpene synthases from lemon (Citrus limon L. Burm. f.) and the subsequent combination of these three into one plant by crossings, we show that it is possible to increase the amount and alter the composition of the blend of monoterpenoids produced in tobacco plants. The transgenic tobacco plant line with the three introduced monoterpene synthases is emitting beta-pinene, limonene, and gamma-terpinene and a number of side products of the introduced monoterpene synthases, from its leaves and flowers, in addition to the terpenoids emitted by wild-type plants. The results show that there is a sufficiently high level of substrate accessible for the introduced enzymes.
authors.affiliation: Business Unit Bioscience, Plant Research International, P.O. Box 16, 6700 AA, Wageningen, The Netherlands.
authors.forename: Joost
authors.initials: J
authors.lastname: Lücker
authors.forename: Wilfried
authors.initials: W
authors.lastname: Schwab
authors.forename: Bianca
authors.initials: B
authors.lastname: van Hautum
authors.forename: Jan
authors.initials: J
authors.lastname: Blaas
authors.forename: Linus H W
authors.initials: LH
authors.lastname: van der Plas
authors.forename: Harro J
authors.initials: HJ
authors.lastname: Bouwmeester
authors.forename: Harrie A
authors.initials: HA
authors.lastname: Verhoeven
mesh_terms: D001483:Base Sequence; D002957:Citrus / Q000201:enzymology* / Q000235:genetics*; D003433:Crosses, Genetic; D018744:DNA, Plant / Q000235:genetics; D035264:Flowers / Q000254:growth & development / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D005818:Genetic Engineering; D019753:Intramolecular Lyases / Q000235:genetics* / Q000378:metabolism*; D039821:Monoterpenes / Q000737:chemistry / Q000378:metabolism; D009812:Odorants; D030821:Plants, Genetically Modified; D014026:Nicotiana / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*
chemical_list: D018744:DNA, Plant; D039821:Monoterpenes; D019753:Intramolecular Lyases; C040265:pinene cyclase I