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Cell Wall Bound Ferulic Acid in Barley Seedlings during Development and its Photoisomerization
1Department of Botany, University of British Columbia, Vancouver, B.C., Canada, V6T 1W5.
Abstract:
Only the E-isomer of ferulic acid was detected in alkaline hydrolyzates of cell walls of coleoptiles and primary leaves of etiolated barley seedlings. The levels of E-ferulic acid increased significantly with growth reaching a maximum of 50 μ moles/g dry cell wall. The accumulation started one day later and finished one day later than the increase in dry weight of cell walls. On irradiation of dark grown plants the Z-isomer was produced in cell walls by direct photoisomerization of the E-isomer. The levels of Z-isomer formed did not change during a subsequent 21 hr dark incubation.
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