Plants can adjust their competitive traits for acquiring resources in response to the relatedness of their neighbours. Recently, it has been found that plants can alter their investment in traits of attracting pollinators based on kin-interaction. We build a mathematical model to study the optimal floral display to attract pollinators in a patch with kin structure. We show that when plants can attract pollinators to a whole patch through the magnet effect, the floral display should increase with the increasing relatedness of the plants in the patch. Our model also indicates that increasing investment into attracting pollinators is a form of altruism, reducing a plant’s own seed production but increasing the contribution of other plants to its fitness. We also predict that seed production should increase with increasing relatedness in the patch. Our model provides the explicit conditions when resource allocation to attract pollinators in response to neighbour relatedness can be favoured by kin selection, and a possible mechanism for the plants to deal with the consequent loss of pollinator diversity and abundance.

植物可以根据邻居的亲缘关系调整其竞争性特征以获得资源。最近，已经发现植物可以基于亲缘相互作用改变对吸引传粉媒介性状的投资。我们建立了一个数学模型来研究最佳花卉展示，以吸引具有亲缘结构补丁的授粉媒介。我们表明，当植物可以通过磁性效应将传粉媒介吸引到整个斑块时，花卉展示应该随着斑块中植物的相关性增加而增加。我们的模型还表明，增加吸引传粉媒介的投资是利他主义的一种形式，减少了植物自身的种子产量，但增加了其他植物对其适应性的贡献。我们还预测，随着斑块中相关性的增加，种子产量应会增加。