Table 1.

Uptake of different phenolics by plasma and vacuolar membrane vesicles

	Plasma membrane		Vacuolar membrane
	+MgATP	−MgATP	+MgATP	−MgATP
Substrate	(nmol/mg protein) (10 min)
Coniferyl alcohol	7.9 ± 2.0	2.2 ± 0.2	0.6 ± 0.1	0.6 ± 0.1
Coniferaldehyde	3.0 ± 0.9	1.1 ± 0.3	ND	ND
Coniferin	ND	ND	3.2 ± 0.9	0.6 ± 0.1
Sinapyl alcohol	5.8 ± 1.3	1.8 ± 0.3	0.2 ± 0.05	0.2 ± 0.01
Sinapaldehyde	1.7 ± 0.6	0. 5 ± 0.1	ND	ND
Syringin	ND	ND	2.1 ± 0.2	0. 7 ± 0.1
Ferulic acid	Trace	Trace	ND	ND

Uptake was measured in standard uptake medium containing various monolignols in the presence or absence of 5 mM MgATP. Values shown are mean ± SD (n = 3). ND, not detectable.