| how much territory can a single e. coli cell control? | bacteria have been traditionally classified in terms of size and shape and are best known for their very small size. escherichia coli cells in particular are small rods, each 1-2 μ. however, the size varies with the medium, and faster growing cells are larger because they must have more ribosomes to make more protoplasm per unit time, and ribosomes take up space. indeed, maaløe's experiments on how e. coli establishes its size began with shifts between rich and poor media. recently much larger b ... | 2015 | 25954251 |
| food vacuole contents in the ciliate, balantidium jocularum (balantididae), a symbiont in the intestine of the surgeonfish, naso tonganus (acanthuridae). | during the past 16 years, the ciliate balantidium jocularum has been collected from the intestines of many specimens of its fish host, naso tonganus, all collected from the great barrier reef near lizard island, australia. ciliates for this study of food consumption were isolated in 1988, 1989, 2003, and 2005. nineteen specimens of b. jocularum were examined in the transmission electron microscope to determine the contents of both food vacuoles and a putative discharging cytoproct vacuole. food ... | 2006 | 16872294 |
| export pumps in epulopiscium fishelsoni, the symbiotic giant gut bacterium in acanthurus nigrofuscus. | activity of the potential antixenobiotic efflux pumps of epulopiscium fishelsoni (epulos), the symbiotic giant gut bacterium of the algivorous surgeonfish acanthurus nigrofuscus, was studied in vivo using various specific substrates and microfluorometry. kinetic and inhibitor analyses revealed the following vital efflux activities: (1) verapamil-sensitive efflux of amphiphilic cationic compounds rhodamine b, hoechst 33342, and ethidium bromide; (2) verapamil-sensitive efflux of hydrophobic neutr ... | 2006 | 16534627 |
| gigantism in a bacterium, epulopiscium fishelsoni, correlates with complex patterns in arrangement, quantity, and segregation of dna. | epulopiscium fishelsoni, gut symbiont of the brown surgeonfish (acanthurus nigrofuscus) in the red sea, attains a larger size than any other eubacterium, varies 10- to 20-fold in length (and >2, 000-fold in volume), and undergoes a complex daily life cycle. in early morning, nucleoids contain highly condensed dna in elongate, chromosome-like structures which are physically separated from the general cytoplasm. cell division involves production of two (rarely three) nucleoids within a cell, depos ... | 1998 | 9791108 |
| the largest bacterium. | the large, morphologically peculiar microorganism epulopiscium fishelsoni inhabits the intestinal tract of acanthurus nigrofuscus, a brown surgeonfish (family acanthuridae) from the red sea. similar microorganisms have been found in surgeonfish species from the great barrier reef. as these microorganisms have only been seen in surgeonfish and no free-living forms have been found, they are considered to be specific symbionts of surgeonfish, although the nature of the symbiosis is unclear. initial ... | 1993 | 8459849 |
| an unusual symbiont from the gut of surgeonfishes may be the largest known prokaryote. | symbionts first reported from the gut of a red sea surgeonfish, acanthurus nigrofuscus (family acanthuridae), were subsequently described as epulopiscium fishelsoni. the taxonomic position of this very large (up to 576 microns in length) microorganism has previously been designated in the literature as either uncertain or eukaryotic. we suggest that similar symbionts from great barrier reef surgeonfish may be prokaryotes, which together with e. fishelsoni from the red sea may represent the large ... | 1991 | 1885516 |