BIOSYNTHESIS AND CONSTITUTION OF LIGNIN
BIOSYNTHESIS AND CONSTITUTION OF LIGNIN
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DOI：
10.1038/1831152a0
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发表时间：
1959-01-01
期刊：
影响因子：
64.8
通讯作者：
FREUDENBERG, K
中科院分区：
文献类型：
--
作者：
FREUDENBERG, K
During the past eight years we have been studying the biosynthesis of lignin by the method of introducing various radioactive substances into spruce saplings. The needles of a small side twig are trimmed down, and the twig is allowed to suck up a solution containing the tracer". It is found, when using radioactive D-coniferin, that the radioactivity is fixed within a few days in the region around the point of attachment of the branch, and radioactive lignin is obtained (Fig. 1). Afterwards, normal cells grow over the radioactive ones. Using L-coniferin, prepared from L-glucose and radioactive coniferyl alcohol, no radioactive lignin is obtained". When radioactive phenylalanine is introduced, it is trans-formed into radioactive coniferin", which can be isolated from the plant after one or two days. After a further few days, we find once again that the radioactivity is fixed in that zone of cells which is in the process of lignification at the time of the experiment. It is astonishing how quickly the transformation of the phenylalanine into coniferyl alcohol, and the conversion of the latter to its glucoside, take place. Thus, coniferyl alcohol is derived from an acid of the C, C, group, precursors of which are shikimic and prephenic acids.
