Sequestration and biosynthesis of cyanogenic glucosides in passion vine butterflies and consequences for the diversification of their host plants
Sequestration and biosynthesis of cyanogenic glucosides in passion vine butterflies and consequences for the diversification of their host plants
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西番莲蝴蝶体内氰苷的封存和生物合成及其对宿主植物多样化的影响
DOI：
10.1002/ece3.5062
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发表时间：
2019
影响因子：
2.6
通讯作者：
S. Bak
中科院分区：
文献类型：
--
作者：
Érika C. Pinheiro de Castro;Mika Zagrobelny;J. P. Zurano;Márcio Zikan Cardoso;R. Feyereisen;S. Bak
摘要色彩艳丽的蝶形目蝴蝶由于其体内含有由脂肪族氨基酸生物合成的防御化合物--生氰葡糖苷（CNglcs）而引起捕食者的反感。蝎尾蕉属幼虫专食西番莲属植物，其中已报道约30种CNglc。其中，一些环戊烯基甘氨酸衍生的CNglc可以被一些Heliconius物种螯合。为了了解这些蝴蝶中CNglc的生物合成和螯合的演变及其与西番莲属植物的军备竞赛的后果，我们分析了CNglc在选定的螺旋茄碱和西番莲属物种中的分布。环戊烯基CNglcs的螯合不是Heliconius的独有特征，因为这些化合物存在于其他Heliconiines如Philaethria，Dryas和Agraulis以及更远的相关属Cethosia和Euptoieta中。因此，螯合环戊烯基CNglc的能力可能出现在蝎尾蕉亚科的祖先中。脂族CNglcs的生物合成在这些蝴蝶中广泛存在，尽管来自sara‐sapho组的一些物种似乎已经失去了这种能力。在西番莲属植物中的CNglc分布表明，它们可能已经多样化了它们的生氰轮廓，以逃避heliconiine草食动物。这一系统的分析加深了我们对蝎尾蕉-西番莲系统中蓝藻发生演化的认识。
Abstract The colorful heliconiine butterflies are distasteful to predators due to their content of defense compounds called cyanogenic glucosides (CNglcs), which they biosynthesize from aliphatic amino acids. Heliconiine larvae feed exclusively on Passiflora plants where ~30 kinds of CNglcs have been reported. Among them, some CNglcs derived from cyclopentenyl glycine can be sequestered by some Heliconius species. In order to understand the evolution of biosynthesis and sequestration of CNglcs in these butterflies and its consequences for their arms race with Passiflora plants, we analyzed the CNglc distribution in selected heliconiine and Passiflora species. Sequestration of cyclopentenyl CNglcs is not an exclusive trait of Heliconius, since these compounds were present in other heliconiines such as Philaethria, Dryas and Agraulis, and in more distantly related genera Cethosia and Euptoieta. Thus, it is likely that the ability to sequester cyclopentenyl CNglcs arose in an ancestor of the Heliconiinae subfamily. Biosynthesis of aliphatic CNglcs is widespread in these butterflies, although some species from the sara‐sapho group seem to have lost this ability. The CNglc distribution within Passiflora suggests that they might have diversified their cyanogenic profile to escape heliconiine herbivory. This systematic analysis improves our understanding on the evolution of cyanogenesis in the heliconiine–Passiflora system.