Plants are complex biological systems under constant and dynamic interaction with diverse microbial communities which influence their development. The microbial communities associated to plants could possess specific functions on basis on colonized tissue. In crop plants, microbial diversity and their beneficial effects can be affected by plant genotype and farming activities. In this context, we explored biodiversity of Pseudomonas strains isolated from leaves of pepper and lettuce crops, through phylogenetic analysis and physiological profile coupled with specific biochemical tests for plant-microorganism interaction. Bacterial isolates showed genetic and phenotypic diversity despite to be isolated from domestic plant crops. The importance of biodiversity at taxonomic and functional level found in phyllosphere of plant crops and its relationship to achieving sustainability is discussed.

植物是复杂的生物系统，在与影响其发育的各种微生物群落之间不断不断地相互作用。与植物有关的微生物群落可以基于定植的组织而具有特定的功能。在农作物中，微生物的多样性及其有益作用会受到植物基因型和种植活动的影响。在这种情况下，我们探索了假单胞菌的生物多样性通过系统发育分析和生理概况以及针对植物-微生物相互作用的特定生化测试，从辣椒和生菜作物的叶片中分离出的菌株。尽管细菌分离物是从国内植物作物中分离出来的，但仍显示出遗传和表型多样性。讨论了在植物农作物的叶层中生物多样性在分类学和功能水平上的重要性及其与实现可持续性的关系。