Abstract Current predictions suggest that in temperate zones climate change will increase the frequency of extreme events such as summer droughts, leading to deficit in water availability for ecosystems. Plants will more often experience water stress during the spring and summer. The effects of drought on plants in these systems have predominantly been studied in wind-pollinated crop species, focusing on vegetative growth or yield. Although a majority of flowering plants (87 % of all angiosperms) is insect-pollinated, the effects of drought on plant–pollinator interactions are not well studied. However, plant pollination and reproduction phases are highly sensitive to this abiotic stress. At plant individual scale, we hypothesize that drought will alter plant–pollinator interactions via (i) signals or cues for insect visitors (floral display, plant height, number of flowers per plant, flower color, shape and size, olfactory compound quantity and composition) and (ii) floral rewards (nectar volume, total sugar concentration, sugar composition, pollen quantity and chemical composition). In this review, we synthesize evidence related to the effects of drought on floral signals and rewards, and discuss how they may disrupt plant–pollinator relationships.

中文翻译：

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干旱对植物-传粉媒介相互作用的影响：期待什么？

摘要 目前的预测表明，在温带地区，气候变化将增加夏季干旱等极端事件的发生频率，导致生态系统水资源短缺。植物在春季和夏季会更频繁地经历水分胁迫。干旱对这些系统中植物的影响主要在风媒作物物种中进行研究，重点是营养生长或产量。尽管大多数开花植物（所有被子植物的 87%）是昆虫授粉的，但干旱对植物-授粉媒介相互作用的影响尚未得到很好的研究。然而，植物授粉和繁殖阶段对这种非生物胁迫高度敏感。在植物个体尺度上，我们假设干旱将通过 (i) 昆虫访客的信号或线索（花卉展示、株高、每株花的数量、花的颜色、形状和大小、嗅觉化合物的数量和组成）和 (ii) 花卉奖励（花蜜量、总糖浓度、糖成分、花粉数量和化学成分）。在这篇综述中，我们综合了与干旱对花卉信号和奖励的影响相关的证据，并讨论了它们如何破坏植物与传粉媒介的关系。