4.2.3.119 down transcript levels are transiently reduced following mechanical wounding or fungal elicitor treatment 4.2.3.119 additional information under a photoperiod of 12 h/12 h (light/dark), the abundance of QH6 transcripts fluctuates in a diurnal pattern that ebbs around 3 h before daybreak, i.e. 9th h in the dark phase, and peaks after 9 h in light, i.e. 9th h in the light phase. The contents of (-)--pinene in juvenile leaves and in emitted volatiles also vary in a diurnal rhythm, correlating strongly with mRNA accumulation 4.2.3.119 up significant increase in transcript level in the leaders of lateral branches of weevil-attacked and mechanically wounded trees 4.2.3.119 up expression is induced upon wounding or methyljasmonate treatment 4.2.3.119 up upon methyljasmonate treatment, expression is significantly induced in medium and old leaves