Ontogenetic switches from plant resistance to tolerance: minimizing costs with age?
Ontogenetic switches from plant resistance to tolerance: minimizing costs with age?
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DOI：
10.1111/j.1461-0248.2006.01012.x
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发表时间：
2007-03-01
期刊：
影响因子：
8.8
通讯作者：
Brown, Paul
中科院分区：
文献类型：
--
作者：
Boege, Karina;Dirzo, Rodolfo;Brown, Paul
如果这些基本策略的成本和收益也随着植物的发育而改变，那么植物发育过程中食草性和资源可获得性的变化应该会促进抗性和耐受性的个体发育转变。我们提出并测试了一个通用模型来检测萝卜个体发育权衡的表达，这两种可选的抗草食策略。我们发现，个体发育轨迹在抗性和耐受性中都存在，但方向相反。幼虫期比繁殖期抗性强，但耐受性差。从抗性到耐性的个体发育转变与幼树对叶片损害的更大脆弱性以及在每个阶段发现的抗性和耐受性的代价是一致的。我们假设，这里提出的个体发生学观点将有助于解决目前关于普遍耐药-耐受权衡的存在和检测的争论。
Changes in herbivory and resource availability during a plant's development should promote ontogenetic shifts in resistance and tolerance, if the costs and benefits of these basic strategies also change as plants develop. We proposed and tested a general model to detect the expression of ontogenetic tradeoffs for these two alternative anti-herbivory strategies in Raphanus sativus. We found that ontogenetic trajectories occur in both resistance and tolerance but in opposite directions. The juvenile stage was more resistant but less tolerant than the reproductive stage. The ontogenetic switch from resistance to tolerance was consistent with the greater vulnerability of young plants to leaf damage and with the costs of resistance and tolerance found at each stage. We posit that the ontogenetic perspective presented here will be helpful in resolving the current debate on the existence and detection of a general resistance-tolerance tradeoff.