. 2022 Feb 19;42(8):1570–1586. doi: 10.1093/treephys/tpac019

Table 2.

Physical properties of selected terpenoids and their main storage site in Norway spruce shoots.

Compound	Chemical group	Chemical formula	Vapour pressure (kPa at 25 °C)	Atmospheric lifetime in reaction with^c		Main storage site in shoot^d
Compound	Chemical group	Chemical formula	Vapour pressure (kPa at 25 °C)	OH	O₃	Main storage site in shoot^d
α-Pinene	nMT	C₁₀H₁₆	0.63^a	2.6 h	4.6 h	Needles, bark + wood
Camphene	nMT	C₁₀H₁₆	0.33^b	2.6 h	18 day	Needles
Limonene	nMT	C₁₀H₁₆	0.26^a	49 min	2.0 h	Needles, bark + wood
1,8-Cineole	oMT	C₁₀H₁₈O	0.25^b	1.0 day	>110 day	Needles
(E)-β-Caryophyllene	nST	C₁₅H₂₄	0.0017^a	42 min	2 min	Needles

nMT = non-oxygenated monoterpene, oMT = oxygenated monoterpene, nST = non-oxygenated sesquiterpene. The higher the vapour pressure, the more volatile the compound.

^a Mofikoya et al. (2019).

^bPubChem database (https://pubchem.ncbi.nlm.nih.gov).

^c Atkinson and Arey (2003).

^d Bufler et al. 1990, Kivimäenpää et al. (2021).