Variation in resistance and virulence in the interaction between Arabidopsis thaliana and a bacterial pathogen
Variation in resistance and virulence in the interaction between Arabidopsis thaliana and a bacterial pathogen
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DOI：
10.1111/j.0014-3820.2006.tb00501.x
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发表时间：
2006-08-01
期刊：
影响因子：
3.3
通讯作者：
Bergelson, Joy
中科院分区：
文献类型：
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作者：
Goss, Erica M.;Bergelson, Joy
我们研究了高度自交的一年生杂草拟南芥和其叶面细菌病原体绿黄假单胞菌之间的相互作用的变化和局部适应的程度交叉感染23个细菌菌株与35株系收集从6休耕或耕地在中西部，美国。我们使用了两种抗性和毒力的措施：叶片中的细菌计数和感染后四天的症状发展。我们发现在A.结果表明，在P. viridiflava中，两个不同的遗传分支之间的症状存在显著差异。我们还观察到，电阻和植物发育速率随原产地（栽培或休闲）的字段类型而变化，可能通过年龄相关的电阻，一种发育调节的一般形式的电阻。最后，我们没有观察到宿主或病原体的局部适应，而是发现了部分依赖于P. viridiflava分支的种群间变异模式。这些数据表明，A. thaliana和P. viridiflava之间的差异在空间上不同，并且由宿主种群的选择机制和P. viridiflava分支的差异表现介导。这是研究野生植物种群细菌病原体的数量非常有限的研究之一，也是研究植物-病原体关联中的变异模式的少数研究之一，而植物-病原体关联不是高度专业化的基因对基因相互作用。
We examined patterns of variation and the extent of local adaptation in the interaction between the highly selfing annual weed Arabidopsis thaliana and its foliar bacterial pathogen Pseudomonas viridiflava by cross-infecting 23 bacterial isolates with 35 plant lines collected from six fallow or cultivated fields in the Midwest, USA. We used two measures of resistance and virulence: bacterial count in the leaf and symptom development four days after infection. We found variation in resistance in A. thaliana and virulence in P. viridiflava, as well as a significant difference in symptoms between two distinct genetic clades within P. viridiflava. We also observed that both resistance and plant development rate varied with field type of origin (cultivated or fallow), possibly through age-related resistance, a developmentally regulated general form of resistance. Finally, we did not observe local adaptation by host or pathogen, rather we found patterns of variation across populations that depended in part on P. viridiflava clade. These data suggest that the interaction between A. thaliana and P. viridiflava varies across space and is mediated by the selection regime of the host populations and differential performance of the P. viridiflava clades. This is one of a very limited number of studies examining a bacterial pathogen of wild plant populations and one of a few studies to examine patterns of variation in a plant-pathogen association that is not a highly specialized gene-for-gene interaction.