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Induced phenylpropanoid metabolism during suberization and lignification: a comparative analysisInduction of the biosynthesis of phenylpropanoids was monitored at the enzyme level through measurement of the temporal change in the activity of two marker enzymes of phenylpropanoid metabolism, phenylalanine ammonia-lyase, (PAL, E.C. 4.1.3.5) and 4-coumaryl-CoA ligase (4-CL, E.C. 6.2.1.12) and two marker enzymes for hydroxycinnamyl alcohol biosynthesis, cinnamoyl-CoA:NADP+ oxidoreductase (CCR, E.C. 1.2.1.44) and cinnamyl alcohol dehydrogenase (CAD, E.C. 1.1.1.195) in both suberizing potato (Solanum tuberosum) tubers and lignifying loblolly pine (Pinus taeda) cell cultures. While measurable activities of PAL, 4-CL and CAD increased upon initiation of suberization in potato tubers, that of CCR did not. By contrast, all four enzymes were induced upon initiation of lignification in pine cell cultures. The lack of CCR induction in potato by wound treatment is consistent with the channelling of hydroxycinnamoyl-CoA derivatives away from monolignol formation and toward other hydroxycinnamoyl derivatives such as those that accumulate during suberization.
Document ID
20040088449
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Bernards, M. A.
(University of Western Ontario London ON, Canada)
Susag, L. M.
Bedgar, D. L.
Anterola, A. M.
Lewis, N. G.
Date Acquired
August 21, 2013
Publication Date
December 1, 2000
Publication Information
Publication: Journal of plant physiology
Volume: 157
Issue: 6
ISSN: 0176-1617
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAG2-1198
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Plant Biology

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