Xie De-Yu, Sharma Shashi B, Paiva Nancy L, Ferreira Daneel, Dixon Richard A
Plant Biology Division, Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, OK 73401, USA.
Science. 2003 Jan 17;299(5605):396-9. doi: 10.1126/science.1078540.
Condensed tannins (CTs) are flavonoid oligomers, many of which have beneficial effects on animal and human health. The flavanol (-)-epicatechin is a component of many CTs and contributes to flavor and astringency in tea and wine. We show that the BANYULS (BAN) genes from Arabidopsis thaliana and Medicago truncatula encode anthocyanidin reductase, which converts anthocyanidins to their corresponding 2,3-cis-flavan-3-ols. Ectopic expression of BAN in tobacco flower petals and Arabidopsis leaves results in loss of anthocyanins and accumulation of CTs.
缩合单宁（CTs）是类黄酮低聚物，其中许多对动物和人类健康有益。黄烷醇（-）-表儿茶素是许多CTs的组成成分，对茶和葡萄酒的风味及涩味有贡献。我们发现，来自拟南芥和蒺藜苜蓿的BANYULS（BAN）基因编码花青素还原酶，该酶可将花青素转化为其相应的2,3-顺式黄烷-3-醇。BAN在烟草花瓣和拟南芥叶片中的异位表达导致花青素缺失和CTs积累。
