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(名词解析)

lignin (木质素)

正确答案

是由聚合的芳香醇构成的一类物质,存在于木质组织中,主要作用是通过形成交织网来硬化细胞壁。木质素主要位于纤维素纤维之间,起抗压作用。在木本植物中,木质素占25%,是世界上第二位最丰富的有机物(纤维素是第一位)。

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