Plant ploidy level influences selection by butterfly seed predators
Plant ploidy level influences selection by butterfly seed predators
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DOI：
10.1111/j.0030-1299.2008.16347.x
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发表时间：
2008-07-01
期刊：
影响因子：
3.4
通讯作者：
Ehrlen, Johan
中科院分区：
文献类型：
--
作者：
Arvanitis, Leena;Wiklund, Christer;Ehrlen, Johan
多倍体化是植物多样化的一种常见途径。多倍体通常在大小、花数、花大小和开花物候上与它们的祖先不同。这种差异可能转化为与动物互动强度的差异。研究了多年生草本植物小豆碱四倍体和八倍体的倍性相关差异对小豆碱Anthocharis cardamines传播前捕食种子的影响。即使考虑到八倍体比四倍体更大、花更少的事实，八倍体逃脱攻击的可能性也比四倍体低。花芽大小与四倍体的攻击概率相关，而与八倍体无关。与多倍体相关的植物性状差异可以改变与动物的相互作用，而动物介导的倍性类型之间的性状选择差异可能有助于它们进一步分化。
Polyploidization is a common route to plant diversification. Polyploids often differ from their progenitors in size, flower number, flower size and flowering phenology. Such differences may translate into differences in the intensity of interactions with animals. Here we investigated the impact of the ploidy-related differences in tetraploids and octoploids of the perennial herb Cardamine pratensis on pre-dispersal seed predation by the butterfly Anthocharis cardamines. The probability of escaping attack was lower for octoploids than for tetraploids, even after accounting for the fact that octoploids were larger and had fewer flowers than tetraploids. Flower shoot size was correlated with probability of attack in tetraploids but not in octoploids. Differences in plant traits associated with polyploidization can alter interactions with animals, and animal-mediated differences in trait selection between ploidy types can contribute to their further divergence.