Nocturnal emission and post-pollination change of floral scent in the leafflower tree, Glochidion rubrum, exclusively pollinated by seed-parasitic leafflower moths
Nocturnal emission and post-pollination change of floral scent in the leafflower tree, Glochidion rubrum, exclusively pollinated by seed-parasitic leafflower moths
复制标题
只由种子寄生的叶花蛾授粉的叶花树Glochidion rubrum的夜间发射和花香的授粉后变化
DOI：
10.1111/1442-1984.12368
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发表时间：
2022
影响因子：
1.4
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Okamoto;T.;Svensson;G. P.;Goto;R.;Kawakita;A.;& Kato;M.
许多昆虫授粉植物使用花香信号来吸引和引导有效的传粉者，并且它们的花香散发的时间模式可以被调整以响应传粉者的活动和授粉状态。在雌雄同株的吊兰树（Phyllanthaceae）和顶头霉属（Gracillariidae）近缘苗圃授粉互惠关系中，花的气味信号介导了种间特异性的相互作用，并分别影响了顶头霉蛾在雄花和雌花上的有效采粉和贮粉行为。我们测试了以下假设：Epicephala授粉的红算盘子的两性花都表现出与昼夜活跃的传粉者的活动期相匹配的气味排放的昼夜模式，并且雌花在授粉后改变化学信号以减少传粉者的进一步访问和产卵。我们研究了在连续两天内花香排放的昼夜变化和授粉对花香的影响，通过在田间进行人工授粉。雌花和雄花的总气味排放量在夜间比白天高，这可能是由Epicephalamoths的夜间访问引起的。有些化合物表现出明显的夜间遗精节律。人工授粉实验表明，橙花叔醇和丁香酚两种化合物的排放量在授粉花中急剧下降，这表明这些化合物可能是传粉者的关键引诱剂;然而，雌花的总气味排放量不受人工授粉的影响。G. rubrum可能被优化以吸引夜间传粉者并减少产卵。
Many insect‐pollinated plants use floral scent signals to attract and guide the effective pollinators, and temporal patterns of their floral scent emission may be tuned to respond to the pollinator's activity and pollination status. In the intimate nursery pollination mutualism between monoeciousGlochidiontrees (Phyllanthaceae) andEpicephalamoths (Gracillariidae), floral scent signals mediate species‐specific interactions and influence the moth's efficient pollen‐collecting and pollen‐depositing behaviors on male and female flowers, respectively. We tested the hypotheses that both sexes of flowers ofEpicephala‐pollinatedGlochidion rubrumexhibit a diel pattern of scent emission matching the activity period of the nocturnally active pollinator, and that female flowers change the chemical signal after pollination to reduce further visits and oviposition by the pollinator. We investigated the diel change of floral scent emissions during two consecutive days and the influence of pollination on the floral scent by conducting hand‐pollinations in the field. The total scent emission of male and female flowers was higher at night than in the day, which would be expected from the nocturnal visitations ofEpicephalamoths. Some compounds exhibited a clear nocturnal emission rhythm. Hand‐pollination experiments revealed that emission of two compounds, nerolidol and eugenol, drastically decreased in pollinated flowers, suggesting that these compounds may function as key attractants for the pollinator; however, the total scent emission of the female flower was not influenced by hand‐pollination. The pattern of the floral scent emission ofG. rubrummay be optimized to attract nocturnal pollinators and reduce oviposition.