TRADEOFF BETWEEN RESISTANCE AND TOLERANCE TO HERBIVORE DAMAGE IN A MORNING GLORY
TRADEOFF BETWEEN RESISTANCE AND TOLERANCE TO HERBIVORE DAMAGE IN A MORNING GLORY
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DOI：
10.1038/377517a0
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发表时间：
1995-10-12
期刊：
影响因子：
64.8
通讯作者：
RAUSHER, MD
中科院分区：
文献类型：
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作者：
FINEBLUM, WL;RAUSHER, MD
许多植物特征，包括有毒的次生化合物，毛状体，刺和坚韧，营养贫乏的叶子，至少部分地进化为防御病原体和食草动物，包括植食性昆虫（1-6）。抗性进化的模型（7）（9）预测，防御分配是由抗性的好处（如减少食草动物的损害）和抗性的代价（通常被认为是在食草动物缺席的环境中适应性的降低）之间的权衡决定的（9）。然而，尽管试图确定阻力的测试，很少有令人信服的证据表明，他们存在和限制防御的演变（10，11）。在这里，我报告存在这样一个成本在高牵牛花，Ipomoea purpurea：表现出相对较高水平的抗性昆虫，造成顶端分生组织的基因型表现出相对较低的耐受性，这种形式的损害。我们还展示了这种类型的权衡如何约束阻力的演变。
MANY plant characters, including toxic secondary compounds, trichomes, spines and tough, nutrient-poor leaves have evolved at least in part as defences against pathogens and herbivores, including phytophagous insects(1-6). Models of the evolution of resistance(7) (9) predict that allocation to defence is determined by a tradeoff between the benefits of resistance, such as reduction in herbivore damage, and costs of resistance, generally envisaged as reduction in fitness in an environment in which herbivores are absent(9). However, despite attempts to determine the tests of resistance, there is little convincing evidence that they exist and constrain the evolution of defences(10,11). Here me report the existence of such a cost in the tall morning glory, Ipomoea purpurea: genotypes that exhibit relatively high levels of resistance to insects that cause damage to apical meristems exhibit relatively low tolerence to this form of damage. We also show how this type of tradeoff constrains the evolution of resistance.