Fruit color polymorphism in a bird-dispersed shrub ( Rhagodia parabolica ) in Australia

作者: Mary F. Willson , Dennis J. O'Dowd

DOI: 10.1007/BF02147930

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摘要: We examined the selective basis of fruit color, a trait assumed to affect attractiveness fruits avian dispersal agents, inRhagodia parabolica in Victoria, Australia. The fleshy ofR. are highly polymorphic color; individual plants may bear red, white, or yellow fruits, some combination these. Red color is produced by betacyanins, betaxanthins, and white other flavonoid compounds. most common less common, relatively rare; red combination. Fruits these color-morphs do not differ maximum size, weight, pulp-seed ratio, water content, content major nutrients (sugars, N, lipids). consumer,Zosterops lateralis, foraged at random on color-morphs, although all fruit-eaters, collectively, slightly favored fruits. Weekly removal rates were equivalent for four morphs. Seeds from differed seed germination behavior: seeds germinated faster than showed greatest response passage throughZ. lateralis guts. Lack strong foraging preferences birds different behaviors contribute maintenance polymorphism.

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