Table 3.

Mean de novo (EM_{de novo}, nmol m⁻² s⁻¹), pool (EM_pool, nmol m⁻² s⁻¹), de novo fractions (f_{de novo}) for each labelling day and treatment (ctr control, trt drought stress). SE represents the standard error. EM_{de novo} and EM_pool are corrected to standard temperature and light conditions (30 °C and 1000 µmol PAR m⁻² s⁻¹, see Equations 3 and 4). Both fractions were derived from the f_{de novo sample} which is calculated by normalizing labelled %¹³C of a specific compound by the labelled %¹³C 1.8-cineole. f_{de novo} is the fraction of EM_{de novo} in the total standardized emissions rate.

Compound	Treatment	Day	EMde novo ± SE	EMpool ± SE	f de novo ± SE
α-Pinene	ctr	2	0.016 ± 0.003	0.026 ± 0.005	0.37 ± 0.05
		8	0.013 ± 0.001	0.022 ± 0.001	0.37 ± 0.02
		15	0.013 ± 0.002	0.023 ± 0.002	0.35 ± 0.04
	trt	2	0.016 ± 0.003	0.075 ± 0.032	0.23 ± 0.08
		8	0.006 ± 0.003	0.036 ± 0.015	0.18 ± 0.09
		15	0.005 ± 0.001	0.044 ± 0.018	0.15 ± 0.06
β-Pinene	ctr	2	0.002 ± 0.001	0.013 ± 0.005	0.09 ± 0.04
		8	0.002 ± 0	0.018 ± 0.005	0.11 ± 0.02
		15	0.002 ± 0.001	0.027 ± 0.009	0.08 ± 0.03
	trt	2	0.001 ± 0	0.024 ± 0.018	0.07 ± 0.04
		8	0 ± 0	0.007 ± 0.006	0.04 ± 0.04
		15	0 ± 0	0.013 ± 0.011	0.02 ± 0.02
Δ3-Carene	ctr	2	0 ± 0	0.096 ± 0.013	0 ± 0
		8	0 ± 0	0.095 ± 0.024	0 ± 0
		15	0 ± 0	0.103 ± 0.03	0 ± 0
	trt	2	0 ± 0	0.056 ± 0.049	0.01 ± 0.01
		8	0 ± 0	0.025 ± 0.022	0 ± 0
		15	0 ± 0	0.064 ± 0.06	0 ± 0
1,8-Cineole	ctr	2	0.070 ± 0.022	0 ± 0	1 ± 0
		8	0.059 ± 0.010	0 ± 0	1 ± 0
		15	0.060 ± 0.013	0 ± 0	1 ± 0
	trt	2	0.058 ± 0.024	0 ± 0	1 ± 0
		8	0.009 ± 0.005	0 ± 0	1 ± 0
		15	0.009 ± 0.002	0 ± 0	1 ± 0
Limonene	ctr	2	0.005 ± 0.002	0.006 ± 0.002	0.32 ± 0.12
		8	0.004 ± 0.001	0.006 ± 0.001	0.41 ± 0.04
		15	0.005 ± 0.001	0.008 ± 0.001	0.39 ± 0.05
	trt	2	0.004 ± 0.002	0.099 ± 0.072	0.18 ± 0.12
		8	0.001 ± 0	0.036 ± 0.027	0.17 ± 0.1
		15	0.001 ± 0.001	0.028 ± 0.017	0.10 ± 0.09
Myrcene	ctr	2	0.035 ± 0.008	0.005 ± 0	0.85 ± 0.04
		8	0.031 ± 0.005	0.006 ± 0.002	0.85 ± 0.03
		15	0.036 ± 0.008	0.008 ± 0.003	0.81 ± 0.06
	trt	2	0.033 ± 0.012	0.047 ± 0.031	0.53 ± 0.17
		8	0.011 ± 0.004	0.012 ± 0.006	0.47 ± 0.13
		15	0.010 ± 0.001	0.019 ± 0.012	0.51 ± 0.14
p-Cymene	ctr	2	0.005 ± 0.002	0.011 ± 0.002	0.31 ± 0.07
		8	0.005 ± 0.001	0.008 ± 0.001	0.37 ± 0.05
		15	0.005 ± 0.001	0.009 ± 0.001	0.37 ± 0.07
	trt	2	0.004 ± 0.002	0.007 ± 0.002	0.27 ± 0.11
		8	0.001 ± 0	0.003 ± 0.001	0.16 ± 0.07
		15	0.001 ± 0	0.005 ± 0.002	0.12 ± 0.05
Total	ctr	2	0.132 ± 0.037	0.158 ± 0.022	0.43 ± 0.04
		8	0.114 ± 0.019	0.154 ± 0.031	0.43 ± 0.02
		15	0.121 ± 0.026	0.178 ± 0.042	0.41 ± 0.06
	trt	2	0.116 ± 0.044	0.308 ± 0.094	0.29 ± 0.07
		8	0.027 ± 0.012	0.120 ± 0.037	0.18 ± 0.06
		15	0.026 ± 0.005	0.173 ± 0.055	0.20 ± 0.09