地衣酸

地衣植物的 次生代谢产物，主要是缩酚（羧）酸类化合物.地衣酸有多种，其中有缩酚（羧）酸、缩酚（羧）酮、 二苯并呋喃、 间苯三酚衍生物、螺缩酚（羧）酮等几种主要类型.地衣酸在地衣体内的分布部位有高度专 化性，如具有各种颜色的绝大部分 蒽醌、枕酸的衍生物、 松萝酸以及无色的黑 茶渍素等，都贮存于地衣的皮层中，所以使地衣表现出各种不同的颜色.而绝大部分缩酚（羧）酸和缩酚（羧）酮则贮存于地衣体的髓层中.地衣酸在医学上有重要用途，如去甲环萝酸、袋衣酸、小红 石蕊酸、 松萝酸等对 革兰氏阳性细菌和 结核杆菌具有较强 抗菌活性，茶痂衣酸有抗癌活性.地衣酸可促使 岩石风化，加速 土壤形成.此外，由于不同的地衣酸对一定的试剂可发不同的 显色反应，所以通过显色试验可以鉴别地衣的种类，对地衣的分类研究有重要意义.Secondary metabolites of lichens, mainly shrinkage phenol (carboxymethyl) acids. Lichen acids There are many, including shrinking phenol (carboxymethyl) acid, phenol reduction (carboxymethyl)-one, dibenzofuran, phloroglucinol derivatives, Lo contraction phenol (carboxymethyl) ketones are several main types. lichens acid in lichens distribution of parts of the body have a high degree of post-secondary resistance, with a variety of colors, such as the vast majority of anthraquinone, pillow acid derivatives, Usnea acid, and colorless black tea stains and other elements, are stored in the lichen cortex, so to enable lichens to demonstrate a variety of colors. The vast majority of shrink phenol (carboxymethyl) acid and phenol reduction (carboxymethyl)-one are stored in the pulp layer of lichen body. lichen acids have important uses in medicine, such as radish acid to a ring, bags clothing acid, red litmus acid, usnic acid against Gram-positive bacteria and Mycobacterium tuberculosis has a potent antibacterial activity of tea callus clothing acids have anti-cancer activity. lichen acids may promote rock weathering, accelerated soil formation. In addition, due to different lichen acids with certain reagents can be issued a different color reaction, so testing can be identified by the color of the lichen type of study on the classification of lichens significance.