Espinosa-Urgel Manuel
Department of Plant Biochemistry and Molecular and Cellular Biology, Estación Experimental del Zaidín, CSIC, Profesor Albareda, 1, Granada 18008, Spain.
Plasmid. 2004 Nov;52(3):139-50. doi: 10.1016/j.plasmid.2004.06.004.
Bacteria of the genus Pseudomonas are usual colonizers of plant leaves, roots, and seeds, establishing at relatively high cell densities on plant surfaces, where they aggregate and form microcolonies similar to those observed during biofilm development on abiotic surfaces. These plant-associated biofilms undergo chromosomal rearrangements and are hot spots for conjugative plasmid transfer, favored by the close proximity between cells and the constant supply of nutrients coming from the plant in the form of exudates or leachates. The molecular determinants known to be involved in bacterial colonization of the different plant surfaces, and the mechanisms of horizontal gene transfer in plant-associated Pseudomonas populations are summarized in this review.
假单胞菌属细菌通常定殖于植物的叶片、根和种子上，在植物表面以相对较高的细胞密度定殖，在那里它们聚集并形成微菌落，类似于在非生物表面生物膜形成过程中观察到的微菌落。这些与植物相关的生物膜会发生染色体重排，是接合性质粒转移的热点，细胞之间的紧密接近以及植物以渗出物或沥出液形式持续提供的营养物质有利于这种转移。本文综述了已知参与不同植物表面细菌定殖的分子决定因素，以及与植物相关的假单胞菌群体中水平基因转移的机制。
