Abstract
The activities of the following five enzymes which are involved in the formation of lignin have been compared in reaction wood and in opposite wood: phenylalanine ammonia lyase (EC 4.3.1.5), caffeate 3-O-methyltransferase (EC 2.1.1.-), p-hydroxycinnamate: CoA ligase (EC 6.2.1.12), cinnamyl alcohol dehydrogenase (EC 1.1.1.-) and peroxidase (EC 1.11.1.7). The activities of the four first-named enzymes in the compression wood of Thuja orientalis L. and Metasequoia glyptostroboides Hu et Cheng were 2.8±1.4-fold and 2.6±1.5-fold higher than those in opposite wood, respectively, whereas peroxidase had the same level of activity in either type of wood. On the other hand, no differences were observed in the activities of the five enzymes between tension and opposite woods of Robinia pseudoacacia L. These findings are well in accord with the chemical structure of lignin in the compression and tension woods of the three species studied: high content of lignin rich in condensed units in compression wood, and little difference in lignin between tension and opposite woods.
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Abbreviations
- CAD:
-
cinnamyl alcohol dehydrogenase (EC 1.1.1.-)
- OMT:
-
caffeate O-methyltransferase (EC 2.1.1-)
- PAL:
-
phenylalanine ammonia lyase (EC 4.3.1.5)
- PCL:
-
p-hydroxycinnamate: CoA ligase (EC 6.2.1.12)
- PO:
-
peroxidase (EC 1.11.1.7)
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Kutsuki, H., Higuchi, T. Activities of some enzymes of lignin formation in reaction wood of Thuja orientalis, Metasequoia glyptostroboides and Robinia pseudoacacia . Planta 152, 365–368 (1981). https://doi.org/10.1007/BF00388263
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DOI: https://doi.org/10.1007/BF00388263