Modelling the effect of environmental factors on the "trade-off" between growth and defensive compounds in young apple trees
Modelling the effect of environmental factors on the "trade-off" between growth and defensive compounds in young apple trees
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DOI：
10.1007/s00468-003-0315-6
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发表时间：
2004-05-01
影响因子：
2.3
通讯作者：
Treutter, D
中科院分区：
文献类型：
--
作者：
Gayler, S;Leser, C;Treutter, D
植物内部资源在生长过程（初级代谢）和防御化合物（次级代谢）中的分配是由植物内部对共同底物和能量的竞争决定的。为了促进关于环境对生长和防御需求之间的权衡影响的讨论，我们扩展了一个复杂的植物生长模型，以模拟整个植物水平上防御化合物的形成，具体取决于环境条件光、养分和水的动态。在本文中，我们提出并应用该模型来模拟不同氮肥施用对幼年苹果树（cv“Golden Delicious”）生长和抗性的影响。结果表明，模型预测能够描述观察到的苹果树幼叶生长速率与苯丙素浓度之间的关系，并有助于解释实验结果。最后，我们估计了在模拟叶病原体文丘里菌攻击的情况下防御投资的成本和收益。
The allocation of plant internal resources to growth processes (primary metabolism) and to defensive compounds (secondary metabolism) is determined by plant internal competition for common substrates and energy. In order to contribute to the discussion about environmental impacts on this trade-off between demands for growth and defence, we extended a complex plant growth model to simulate the formation of defensive compounds on the whole plant level, depending on the dynamics of the environmental conditions light, nutrients and water. In this paper, we present and apply the model to simulate the effects of different N fertilizer applications on growth and resistance of young apple trees (cv "Golden Delicious"). The results show that model predictions are able to describe the observed relation between growth rate and phenylpropanoid concentrations in young leaves of apple trees, and can assist in the interpretation of experimental findings. Finally, we estimate costs and benefits of investment into defence in a scenario, in which an attack by the leaf pathogen Venturia inaequalis is simulated.