Breeding system, pollinator choice and variation in pollen quality in British herbaceous plants
Breeding system, pollinator choice and variation in pollen quality in British herbaceous plants
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DOI：
10.1111/j.1365-2435.2008.01415.x
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发表时间：
2008-08-01
影响因子：
5.2
通讯作者：
Goulson, D.
中科院分区：
文献类型：
--
作者：
Hanley, M. E.;Franco, M.;Goulson, D.
1. 尽管众所周知，不同植物物种提供的授粉媒介奖励的质量差异很大，但尚不清楚植物生殖系统，特别是对昆虫授粉的绝对依赖，可能如何影响授粉媒介奖励的进化。此外，与花蜜奖励和传粉媒介访问之间的相互作用不同，我们对花粉质量影响传粉媒介觅食行为的方式了解有限。2．我们对欧洲西北部 23 种植物的花粉蛋白和氨基酸含量进行了定量。将花粉质量与育种系统进行比较（兼性与专性昆虫授粉）。从单一栖息地采集了 18 种植物的子集样本。为此，我们将熊蜂采集花粉的比例与所提供花粉的质量进行了比较。3．我们发现花粉质量与生殖系统之间存在显着关联；专性昆虫授粉物种的花粉含有较高的蛋白质含量。我们还发现与传粉媒介的使用存在显着关系；采集花粉的大黄蜂最常访问的植物产生的花粉质量最高。4．我们讨论花粉质量和大黄蜂吸引力之间的密切关系如何对植物繁殖成功产生重要益处。然而，我们还展示了这种互利共生的破坏如何对植物和传粉媒介产生不利后果。
1. Although it is well established that different plant species vary considerably in the quality of pollinator rewards they offer, it is unclear how plant reproductive systems, in particular an obligate dependence on insects for pollination, might influence the evolution of pollinator rewards. Moreover, unlike the interaction between nectar reward and pollinator visitation, we have a limited understanding of the way in which pollen quality influences pollinator foraging behaviour.2. We quantified the pollen protein and amino acid content for 23 NW European plant species. Pollen quality was compared with breeding system (facultative- vs. obligate insect-pollinated). A subset of 18 plants was sampled from a single habitat. For these we compared the proportion of pollen collection visits made by bumblebees with the quality of pollen offered.3. We found a significant association between pollen quality and reproductive system; pollen of obligate insect-pollinated species contained higher protein content. We also found a significant relationship with pollinator use; plants most frequently visited by pollen-collecting bumblebees produced the highest-quality pollen.4. We discuss how the close relationship between pollen quality and bumblebee attraction may have important benefits for plant reproductive success. However, we also show how the disruption of this mutualism can have detrimental consequences for plant and pollinator alike.