Table I. Total number of known and unknown metabolites identified in root hairs and stripped roots by GC-MS (polar and nonpolar) and by UPLC-QTOF-MS (LC-MS).

Metabolite	GC-MS Polar	GC-MS Polar	GC-MS Nonpolar	GC-MS Nonpolar	LC-MS	LC-MS	Total
	No.	%	No.	%	No.	%	No.
Known	123	29.1	76	16.6	435	25.1	634
Unknown	299	70.9	383	83.4	1,294	74.9	1,976
Total	422	100	459	100	1,729	100	2,610