Involved in the biosynthesis of homoterpenes, attractants of herbivores parasitoids and predators (e.g. predatory mites and parasitoid wasps) (PubMed:21334702). Involved in diterpene (C20) biosynthesis (PubMed:18398052, PubMed:18842097). Catalyzes the conversion of geranylgeranyl diphosphate to (E,E)-geranyllinalool, the precursor of the insect-induced volatile C16-homoterpene TMTT (PubMed:18398052, PubMed:18842097). (2E,6E,10E)-geranylgeranyl diphosphate + H2O = (6E,10E)-geranyllinalool + diphosphate Binds 3 Mg(2+) or Mn(2+) ions per subunit. Secondary metabolite biosynthesis; terpenoid biosynthesis. Expressed in leaves and flowers. By methyl jasmonate, coronalon, alamethicin and in response to the caterpillar P.xylostella feeding. Induced by infection of avirulent and virulent bacterial pathogen P.syringae. The Asp-Asp-Xaa-Xaa-Asp/Glu (DDXXD/E) motif is important for the catalytic activity, presumably through binding to Mg(2+). No formation of (E,E)-geranyllinalool and TMMTT detected. Belongs to the terpene synthase family. Tpsf subfamily.