Data from: Plant toxin levels in nectar vary spatially across native and introduced populations

Paul A. Egan, Phillip C. Stevenson, Erin Jo Tiedeken, Geraldine A. Wright, Fabio Boylan & Jane C. Stout
Secondary compounds in nectar can function as toxic chemical defences against floral antagonists, but may also mediate plant-pollinator interactions. Despite their ecological importance, few studies have investigated patterns of spatial variation in toxic nectar compounds in plant species, and none outside their native range. Grayanotoxin I (GTX I) occurs in nectar of invasive Rhododendron ponticum where it is toxic to honeybees and some solitary bee species. We examined (i) geographic variation in the composition of...
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