Proof of anthocyanins in the carnivorous plant genus Nepenthes,FEBS Open Bio

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Proof of anthocyanins in the carnivorous plant genus Nepenthes
FEBS Open Bio ( IF 2.8 ) Pub Date : 2021-07-21 , DOI: 10.1002/2211-5463.13255
Alberto Dávila-Lara ₁ , Michael Reichelt ₂ , Ding Wang ₁ , Heiko Vogel ₃ , Axel Mithöfer ₁

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Yellow to red colored betalains are a chemotaxonomic feature of Caryophyllales, while in most other plant taxa, anthocyanins are responsible for these colors. The carnivorous plant family Nepenthaceae belongs to Caryophyllales; here, red-pigmented tissues seem to attract insect prey. Strikingly, the chemical nature of red color in Nepenthes has never been elucidated. Although belonging to Caryophyllales, in Nepenthes, some molecular evidence supports the presence of anthocyanins rather than betalains. However, there was previously no direct chemical proof of this. Using ultra-high-performance liquid chromatography-electrospray ionization-high-resolution mass spectrometry, we identified cyanidin glycosides in Nepenthes species and tissues. Further, we reveal the existence of a complete set of constitutively expressed anthocyanin biosynthetic genes in Nepenthes. Thus, here we finally conclude the long-term open question regarding red pigmentation in Nepenthaceae.

中文翻译：

肉食植物猪笼草属中花青素的证明

黄色到红色的甜菜碱是石竹目的化学分类学特征，而在大多数其他植物分类群中，花青素是造成这些颜色的原因。食虫植物科猪笼草属石竹目；在这里，红色的组织似乎会吸引昆虫猎物。引人注目的是，从未阐明猪笼草中红色的化学性质。虽然属于石竹目，但在猪笼草中，一些分子证据支持存在花青素而不是甜菜碱。然而，以前没有直接的化学证据证明这一点。使用超高效液相色谱-电喷雾电离-高分辨质谱，我们鉴定了猪笼草中的花青素苷物种和组织。此外，我们揭示了猪笼草中存在一整套组成型表达的花青素生物合成基因。因此，在这里，我们终于结束了关于猪笼草科红色色素沉着的长期悬而未决的问题。

更新日期：2021-09-01

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