A model of Ustilago maydis leaf tumor metabolism
A model of Ustilago maydis leaf tumor metabolism
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DOI：
10.4161/psb.5.11.13360
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发表时间：
2010-01-01
影响因子：
2.9
通讯作者：
Voll, Lars M.
中科院分区：
文献类型：
--
作者：
Horst, Robin J.;Doehlemann, Gunther;Voll, Lars M.
近年来，植物与病原菌相互作用的分子机制研究取得了很大进展。虽然主要的研究重点在于防御和反防御机制，但一些植物-病原体相互作用已在生理水平上进行了表征。只有少数研究集中在植物病原体的营养获取策略。在以前的研究中，我们分析了肿瘤诱导真菌Ustilago maydis对玉米叶片的局部感染如何影响整个植物的生理学，并能够表明碳和氮同化物被重新路由到肿瘤。虽然库强度的感染新兴的嫩叶增加与肿瘤的发展，系统源叶表现出较高的出口同化物和延迟衰老，以弥补改变库源平衡。在这里，我们提供了新的实验数据，这些同化物在肿瘤中的代谢，并提出了一个模型，它们在感染组织中的利用。
Extensive progress has been made in the last years in unraveling molecular mechanisms of plant-pathogen interactions. Although the main research focus lies on defense and counter-defense mechanisms, some plant-pathogen interactions have been characterized on the physiological level. Only a few studies have focused on the nutrient acquisition strategies of phytopathogens. In a previous study, we analyzed how local infection of maize leaves by the tumor-inducing fungus Ustilago maydis affects whole plant physiology and were able to show that carbon and nitrogen assimilates are rerouted to the tumor. While the sink strength of infected emerging young leaves increases with tumor development, systemic source leaves exhibit elevated export of assimilates and delayed senescence to compensate for the altered sink-source balance. Here we provide new experimental data on the metabolization of these assimilates in the tumor and propose a model on their utilization in the infected tissue.