A new model for the pathozone of the take-all pathogen, Gaeumannomyces graminis var. tritici
A new model for the pathozone of the take-all pathogen, Gaeumannomyces graminis var. tritici
复制标题
DOI：
10.1111/aab.12060
复制
发表时间：
2013-11-01
影响因子：
2.6
通讯作者：
Bailey, D. J.
中科院分区：
文献类型：
--
作者：
Gosme, M.;Lebreton, L.;Bailey, D. J.
通常用缺乏生物学意义的统计模型来描述致病臭氧(地下植物器官周围的土壤体积，如果繁殖体要有机会感染器官，就必须在其中发生)。因此，路径臭氧的结果可能很难解释，估计的参数不能在其他研究中重复使用。我们开发了一个模型，其参数反映了土传病原体原发感染的生活史特征。然后将该模型与8个禾谷盖曼氏酵母菌株的实验数据进行了拟合。小麦全蚀病病原菌--小黑麦。我们的模型不仅提供了对臭氧动力学的机理描述，而且比文献中发表的其他四个模型更好地拟合了数据。尽管这些分离株在致病臭氧动力学方面表现出表型变异，但这些差异并没有映射到已知发生在GGT群体中的G1和G2遗传亚群。
The pathozone (volume of soil surrounding subterranean plant organs within which a propagule must occur if it is to have any chance of infecting the organ) is usually described by statistical models lacking biological meaning. For this reason, pathozone results might be difficult to interpret and the estimated parameters cannot be re-used in other studies. We developed a model with parameters reflecting life-history traits concerning primary infections of soilborne pathogens. The model was then fitted to experimental data obtained from eight isolates of Gaeumannomyces graminis var. tritici, causal agent of take-all disease of wheat. Our model provided not only a mechanistic description for the pathozone dynamics, but also a better fit to the data than four other models published in the literature. Although the isolates displayed phenotypic variability in terms of pathozone dynamics, these differences did not map onto the G1 and G2 genetic subgroups known to occur in Ggt populations.