Volatile emissions were detected for the first time in male flowers of the early-branching angiosperm Amborella trichopoda, suggesting a defensive and attractive double role of these compounds. Flower volatile emissions were detected for the first time in male flowers of the early-branching angiosperm Amborella trichopoda. A mixture of seven volatile compounds is found in flower buds, with limonene resulting as the most abundant compound (67%). Further five volatiles are found in freshly opened flowers, with limonene contributing to 31.7%, followed by decanal (15.5%) and by ethyl octanoate (10.3%). While monoterpene hydrocarbons dominate in flower buds (73.6%), their emission in freshly opened flowers is reduced to 41.1%, while non-terpene derivatives are the most abundant (47.1%) chemical class. These compounds, emitted in low amounts, are possibly linked to pollen, which is considered the only reward offered for insect-pollination in this species.

中文翻译：

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早分枝被子植物毛刺龙涎香雄花挥发物的自发释放

首次在早期分枝的被子植物 Amborella trichopoda 的雄花中检测到挥发性排放物，表明这些化合物具有防御和吸引人的双重作用。首次在早分枝的被子植物毛刺龙涎香的雄花中检测到花挥发物。在花蕾中发现了七种挥发性化合物的混合物，其中柠檬烯是最丰富的化合物（67%）。在新开的花中还发现了另外五种挥发物，柠檬烯占 31.7%，其次是癸醛 (15.5%) 和辛酸乙酯 (10.3%)。虽然单萜烃在花蕾中占主导地位（73.6%），但它们在新开的花朵中的排放量减少到 41.1%，而非萜烯衍生物是最丰富的化学类别（47.1%）。这些化合物以少量排放，