Table 1.

Uptake of different phenolics by plasma and vacuolar membrane vesicles

Plasma membraneVacuolar membrane
+MgATP−MgATP+MgATP−MgATP
Substrate(nmol/mg protein) (10 min)
Coniferyl alcohol7.9 ± 2.02.2 ± 0.20.6 ± 0.10.6 ± 0.1
Coniferaldehyde3.0 ± 0.91.1 ± 0.3NDND
ConiferinNDND3.2 ± 0.90.6 ± 0.1
Sinapyl alcohol5.8 ± 1.31.8 ± 0.30.2 ± 0.050.2 ± 0.01
Sinapaldehyde1.7 ± 0.60. 5 ± 0.1NDND
SyringinNDND2.1 ± 0.20. 7 ± 0.1
Ferulic acidTraceTraceNDND
  • 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.