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Author:
Date:
2015-03-20
[Abstract] Lignin is a complex polymer of phenolic compounds (monolignins), which contributes to the rigidity of the plant cell wall. Lignification is essential for plant development, however it is also one of the mechanisms of plant defense. Accumulation of lignin and the polymerization of monolignins at sides of pathogen attack protect the cell wall against cell wall-degrading enzymes and prevent therefore the pathogen’s penetration. In addition to cross-linkage of phenolic compounds, this resistance mechanism includes also callose and cellulose appositions on the cell wall. This results in structures called papillae, which provide the necessary resistance to the mechanical pressure exercised by fungal appressorium. Lignin accumulation in cell walls is therefore a part of plant defense responses. ...
[摘要] 木质素是酚类化合物（木质素）的复杂聚合物，其有助于植物细胞壁的刚性。木质素是植物发育的关键，但它也是植物防御的机制之一。木质素的积累和木质素在病原体攻击侧的聚合保护细胞壁免受细胞壁降解酶的影响，从而防止病原体的渗透。除了酚类化合物的交联之外，该阻力机制还包括在细胞壁上的胼cal质和纤维素结合。这导致称为乳头的结构，其提供对由真菌附属物施加的机械压力的必要的抵抗力。因此，细胞壁中的木质素积累是植物防御反应的一部分。在这里我们描述了木质素和细胞壁酚类化合物的量化方法，其基于酸催化反应，产生适合于光度测量的有色和可溶性木质素 - 巯基乙酸酯复合物。
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