Predatory prokaryotes: Predation and primary consumption evolved in bacteria

R. Guerrero, C. Pedros-Alio, I. Esteve, J. Mas, D. Chase, L. Margulis

Producció científica: Contribució a una revistaArticleRecercaAvaluat per experts

122 Cites (Scopus)

Resum

Two kinds of predatory bacteria have been observed and characterized by light and electron microscopy in samples from freshwater sulfurous lakes in northeastern Spain. The first bacterium, named Vampirococcus, is Gram-negative and ovoidal (0.6 μm wide). An anaerobic epibiont, it adheres to the surface of phototrophic bacteria (Chromatium spp.) by specific attachment structures and, as it grows and divides by fission, destroys its prey. An important in situ predatory role can be inferred for Vampirococcus from direct counts in natural samples. The second bacterium, named Daptobacter, is a Gram-negative, facultatively anaerobic straight rod (0.5 x 1.5 μm) with a single polar flagellum, which collides, penetrates, and grows inside the cytoplasm of its prey (several genera of Chromatiaceae). Considering also the well-known case of Bdellovibrio, A gram-negative, aerobic curved rod that penetrates and divides in the periplasmic space of many chemotrophic Gram-negative bacteria, there are three types of predatory prokaryotes presently known (epibiotic, cytoplasmic, and periplasmic). Thus, we conclude that antagonistic relationships such as primary consumption, predation, and scavenging had already evolved in microbial ecosystems prior to the appearance of eukaryotes. Furthermore, because they represent methods by which prokaryotes can penetrate other prokaryotes in the absence of phagocytosis, these associations can be considered preadaptations for the origin of intracellular organelles.
Idioma originalEnglish
Pàgines (de-a)2138-2142
RevistaProceedings of the National Academy of Sciences of the United States of America
Volum83
Número7
DOIs
Estat de la publicacióPublicada - 1 de gen. 1986

Fingerprint

Navegar pels temes de recerca de 'Predatory prokaryotes: Predation and primary consumption evolved in bacteria'. Junts formen un fingerprint únic.

Com citar-ho