Table 4. Correlation analysis between intact GS, GS hydrolysis products and QR inducing activity from apical and basal leaf tissue extracts from 250 µM MeJA treated two different kale cultivars over two years.

Variable	1	2	3	4	5	6	7	8	9	10	11
1. Glucoraphanin
2. Glucobrassicin	0.120
3. Gluconasturtiin	0.726	0.561
4. Neoglucobrassicin	0.500	0.731	0.914
5. QR	0.305	0.747	0.415	0.431
6. I3C	0.203	0.627	0.358	0.422	0.800
7. DIM	−0.374	0.308	−0.209	−0.067	0.042	0.227
8. NI3C	0.810	0.330	0.880	0.767	0.176	0.209	−0.199
9. NeoASG	0.584	0.590	0.802	0.754	0.381	0.548	0.075	0.788
10. Sulforaphane	0.879	0.325	0.907	0.742	0.361	0.382	−0.342	0.853	0.682
11. Endogenous JA	−0.138	0.496	0.575	0.849	0.005	−0.502	−0.262	0.294	0.153	0.157
	(−0.188)	(−0.672)	(−0.489)	(0.247)	(−0.371)	(−0.022)	(0.442)	(0.362)	(0.775)	(−0.320)
12. Myrosinase	0.606	0.391	0.402	0.333	0.433	0.724	0.110	0.439	0.546	0.541	−0.123

Bold values indicate significant correlations among variables from apical and basal leaf tissue extracts based on the Pearson’s correlation at P≤0.05 (n = 16). Upper and bottom values in endogenous JA row indicate correlation coefficients from apical and basal leaf tissue extracts, respectively (n = 8).