Galloyl depsides of tyrosine from young leaves of Inga laurina
Galloyl depsides of tyrosine from young leaves of Inga laurina
复制标题
DOI：
10.1021/np060491m
复制
发表时间：
2007-01-01
影响因子：
5.1
通讯作者：
Kursar, Thomas A.
中科院分区：
文献类型：
--
作者：
Lokvam, John;Clausen, Thomas P.;Kursar, Thomas A.
除了游离的蛋白质氨基酸l -酪氨酸外，月桂树膨大的幼叶还积累了高浓度的三种新的深层物质，没食子酰、间二烯丙基和间三烯丙基l -酪氨酸（1、2和3）。这些化合物的结构是根据它们的光谱性质和通过降解和衍生化实验确定的。它们在幼叶中以以下干重质量百分比出现：酪氨酸，10.4%；1、3.1%;2, 5.0%;3, 1.3%。这些浓度与叶片发育脆弱扩张阶段的化学防御最为一致。在成熟的叶子中既不存在游离酪氨酸，也不存在它的没食子酰深度。
In addition to the free protein amino acid L-tyrosine, the expanding young leaves of Inga laurina accumulate high concentrations of three new depsides, galloyl, m-digalloyl, and m-trigalloyl L-tyrosine (1, 2, and 3). The structures of these compounds were determined on the basis of their spectroscopic properties and through degradation and derivatization experiments. They occur in young leaves at the following dry-weight mass percentages: tyrosine, 10.4%; 1, 3.1%; 2, 5.0%; 3, 1.3%. These concentrations are most consistent with chemical defense during the vulnerable expansion stage of leaf development. Neither free tyrosine nor its galloyl depsides are present in mature leaves.