Variation and fitness costs for tolerance to different types of herbivore damage in Boechera stricta genotypes with contrasting glucosinolate structures.
Variation and fitness costs for tolerance to different types of herbivore damage in Boechera stricta genotypes with contrasting glucosinolate structures.
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DOI：
10.1111/j.1469-8137.2010.03385.x
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发表时间：
2010-10
期刊：
影响因子：
--
通讯作者：
Mitchell-Olds T
中科院分区：
文献类型：
--
作者：
Manzaneda AJ;Prasad KV;Mitchell-Olds T
分析植物对不同食草性模式的耐受性对于理解植物防御进化是必不可少的，但仍然很少。分配成本和耐性与植物化学防御之间的权衡可能会影响耐性的遗传变异。然而，防御的变异也发生在离散的化学结构的存在或不存在的情况下，然而，种内多态对多种草食动物耐受性的影响尚未被评估。这里，在温室实验中，我们研究了10个拟南芥的野生近缘种--狭叶蒲公英对不同类型草食性伤害的耐受性差异和直接分配成本，它们的叶片硫代葡萄糖苷化学结构(甲硫氨酸衍生的硫代葡萄糖苷与支链氨基酸衍生的硫代葡萄糖苷)形成了鲜明的对比。我们发现对不同类型的草食动物的耐受性存在显著的遗传变异。硫代葡萄糖苷组分的结构变化不影响对伤害的耐受性，但可以预测植物的适合性。结构性硫代葡萄糖苷和诱导硫代葡萄糖苷的水平在不同结构类型之间有所不同，但我们没有检测到任何耐受成本，这可以解释不同类型之间耐性的遗传差异。植物对多种食草动物的耐受性之间的权衡可能不能解释在具有不同化学防御特征的植物中存在中等水平的对伤害的耐受性。
Analyses of plant tolerance in response to different modes of herbivory are essential to understand plant defense evolution, yet are still scarce. Allocation costs and trade-offs between tolerance and plant chemical defenses may influence genetic variation for tolerance. However, variation in defenses occurs also for presence or absence of discrete chemical structures, yet, effects of intra-specific polymorphisms on tolerance to multiple herbivores have not been evaluated. Here, in a glasshouse experiment, we investigated variation for tolerance to different types of herbivory damage, and direct allocation costs in 10 genotypes of Boechera stricta (Brassicaceae), a wild relative of Arabidopsis, with contrasting foliar glucosinolate chemical structures (methionine-derived glucosinolates vs glucosinolates derived from branched-chain amino acids). We found significant genetic variation for tolerance to different types of herbivory. Structural variations in the glucosinolate profile did not influence tolerance to damage, but predicted plant fitness. Levels of constitutive and induced glucosinolates varied between genotypes with different structural profiles, but we did not detect any cost of tolerance explaining genetic variation in tolerance among genotypes. Trade-offs among plant tolerance to multiple herbivores may not explain the existence of intermediate levels of tolerance to damage in plants with contrasting chemical defensive profiles.
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影响因子：
3.3
作者：
Fornoni, J;Núnez-Farfán, J
通讯作者：
Núnez-Farfán, J
影响因子：
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作者：
Agrawal, AA
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Cipollini, D
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作者：
Agrawal, AA
通讯作者：
Agrawal, AA