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Another shade of red

机译:另一种红色

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There is more to red than meets the eye. The colour has probably been around for as long as plants have, spreading red across stalks, leaves, fruits and flowers to seduce the incidental pollinator or ward off predators. Surprisingly, although Nature usually tends towards the most economical, in plants there are two ways of making red by using either of two biosynthetic pathways: the betalain one, or the anthocyanin one. While the anthocyanin pathway only produces reds, the betalain pathway supplies both red and yellow pigments. But anthocyanins and betalains are never synthesized within the same plant; it is one or the other. This probably has to do with evolution and the choice of favouring one pathway over another. One protein which has a key role in triggering off the betalain pathway has recently been revealed - transcription factor MYB1.
机译:红色比眼睛能看到的更多。颜色可能与植物一样长,在茎,叶,果实和花朵上散布红色,以诱使偶然的授粉媒介或避开捕食者。出乎意料的是,尽管自然界通常倾向于最经济的方法,但在植物中,有两种通过使用两种生物合成途径中的一种来产生红色的方法:甜菜碱或花青素。虽然花色苷途径仅产生红色,但贝他林途径同时提供红色和黄色颜料。但是,花色素苷和甜菜碱从未在同一株植物中合成。它是一个或另一个。这可能与进化以及选择一条途径优先于另一条途径有关。最近揭示了一种在触发β蛋白酶途径中起关键作用的蛋白质-转录因子MYB1。

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