Floral nectar, which is mainly composed of sugar, plays a major role in attracting pollinators. However, many studies show that most of the nectar also contains antiherbivore secondary compounds, such as phenolics, which could keep away some flower visitors.rnAlthough the non-sugar components, such as phenolics in pollen and nectar, are believed to mediate a plant's interaction with flower visitors, little experimental work has been reported. The compounds have been assumed to act primarily as deterrents.
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