  1.14.14.58 | physiological function |
while enzyme CYP92C5 converts (E)-nerolidol and (E,E)-geranyllinalool to DMNT and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene, respectively, enzyme CYP92C6 only converts (E,E)-geranyllinalool to (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene, TMTT. (E)-4,8-Dimethyl-1,3,7-nonatriene, DMNT, and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene, TMTT, are volatile homoterpenes. Many such volatiles are assigned functions in the defense against pathogens like lepidopteran larvae, aphids, fungi,and bacteria. Maize volatiles released after herbivore damage display high levels of quantitative and qualitative variation. In planta, DMNT is primarily produced by CYP92C5, whereas the majority of TMTT is produced by a related cytochrome P450 monooxygenase, CYP92C6, which is specific for the conversion of (E,E)-geranyllinalool to TMTT |
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