The plant pathogen pseudomonas syringae pv. tomato Is genetically monomorphic and under strong selection to evade tomato immunity - Cai, Rongman; Lewis, James; Yan, Shuangchun; Liu, Haijie; Clarke, Christopher R; Campanile, Francesco; Almeida, Nalvo F; Studholme, David J; Lindeberg, Magdalen; Schneider, David; Zaccardelli, Massimo; Setubal, João Carlos; et al. (PLoS Pathogens, 2011)