Day-night fluctuations in floral scent and their effects on reproductive success in Lilium auratum
Day-night fluctuations in floral scent and their effects on reproductive success in Lilium auratum
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DOI：
10.1007/s10144-008-0097-1
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发表时间：
2009-01-01
影响因子：
1.7
通讯作者：
Sakai, Satoki
中科院分区：
文献类型：
--
作者：
Morinaga, Shin-Ichi;Kumano, Yuko;Sakai, Satoki
我们研究了昼夜授粉对百合雌雄生殖成功的贡献。在白天或晚上将植物装袋12小时，以允许仅夜间或仅日间访客在整个开花期觅食。我们发现，没有显着差异，在种子：胚珠比例之间的日授粉，异花授粉，或控制花。然而，在雄性繁殖成功方面，它是更有利的植物进行授粉的一天和一天授粉的花中的花粉粒的数量显着大于那些在对照花。花挥发物的总量在100%~ 100%之间。夜间金眼液浓度明显高于白天。所有时间序列的花香成分主要是单萜类化合物，其中许多作为夜间天蛾的引诱剂。L.花香味的散发具有明显的季节性偏向。金叶菊可能通过吸引夜间访客来实现雄性繁殖成功，这可能表明该物种花香的相对贡献偏向于雄性繁殖成功。
We examined the contribution of diurnal and nocturnal pollination to male and female reproductive success in Lilium auratum. Plants were bagged for either 12 h during the day or at night to allow either only nocturnal or only diurnal visitors to forage throughout the flowering period. We found that there was no significant difference in the seed:ovule ratio among diurnally pollinated, nocturnally pollinated, or control flowers. However, in terms of male reproductive success, it was more advantageous for the plants to be pollinated both diurnally and nocturnally: the numbers of pollen grains remaining in diurnally pollinated or nocturnally pollinated flowers were significantly greater than those in control flowers. The total amount of floral volatiles of L. auratum was significantly higher at night than during the day. The constituents of floral scent of all time series examined were mostly monoterpenoids, many of which serve as attractants for nocturnal hawkmoths. Such nocturnally biased floral scent emission of L. auratum might achieve male reproductive success by attracting nocturnal visitors, which may suggest that the relative contribution of floral scent in this species is biased towards male reproductive success.