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首页> 外文期刊>Ecological research >Effectiveness Of Buzz Pollination In Pedicularis Chamissonis:significance Of Multiple Visits By Bumblebees
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Effectiveness Of Buzz Pollination In Pedicularis Chamissonis:significance Of Multiple Visits By Bumblebees

机译：蜜蜂孢粉授粉的有效性：大黄蜂多次造访的意义

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摘要

Pollination success of plants is highly susceptible to the frequency of visits and foraging behavior of pollinators. Pollination of the nectarless flowers of Pedicularis species depends on bumblebee workers collecting pollen by vibrating the anthers (buzz pollination). However, little is known about the efficiency of the pollination system. Foraging behavior, pollen removal from anthers and pollen deposition on stigmas of P. chamissonis were studied to assess the effectiveness of buzz pollination in an alpine snowbed population of northern Japan. Although bumblebees tended to visit most of the flowers open at a given time within inflorescences during a single visit, pollen removal rate at the first visit was about 20%, and buzzing period decreased with increasing number of previous visits, resulting in a decreasing proportion of pollen removed per visit as the number of visits increased. These trends enable plants to provide pollen for more pollinators. The number of pollen grains deposited on stigmas was not saturated during the first visit and increased with additional visits. Irrespective of weak self-compatibility, evidence of interference between self and outcross pollen was lacking for seed production. Therefore, buzz pollination in P. chamissonis acts as a mechanism that improves the chance of cross-pollination upon multiple visits if pollinator visitation is frequent.
机译：植物的授粉成功对传粉者的探访次数和觅食行为高度敏感。 Pedicularis物种的无蜜花的授粉依赖于大黄蜂工人通过使花药振动来收集花粉（嗡嗡声授粉）。但是，关于授粉系统的效率知之甚少。研究了觅食行为，从花药中去除花粉以及在Chamissonis柱头上的花粉沉积，以评估嗡嗡授粉在日本北部高山雪床种群中的有效性。尽管大黄蜂在一次访问中往往会访问花序中在给定时间打开的大多数花朵，但第一次访问的花粉去除率约为20％，嗡嗡声的时间随着先前访问次数的增加而减少，导致随着访问次数的增加，每次访问都删除了花粉。这些趋势使植物能够为更多的传粉媒介提供花粉。第一次访视时，沉积在柱头上的花粉粒数量未达到饱和，随其他访视而增加。不管弱的自我相容性，种子生产都缺乏自我和异花粉之间干扰的证据。因此，如果授粉者频繁访视，香蒲假单胞菌的嗡嗡声授粉是一种机制，可提高多次访问时异花授粉的机会。

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