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Lignin biosynthesis consists of three steps: biosynthesis, transport, and polymerization of lignin precursors. Although biosynthesis of lignin precursors in the cell and polymerization of lignin precursors in the cell wall have been studied intensively, reports on the transport of lignin precursors are limited and the overall picture remains unresolved. This review summarizes studies on the transport and storage of monolignols, as well as the monolignol glucoside pathway in seed plants. Several mechanisms of lignin monomer transport may facilitate the plasticity of lignin structures and the spatiotemporal regulation of lignification.
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Taku Tsuyama (2025) studied this question.
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