| diversity of assimilatory nitrate reductase genes from plankton and epiphytes associated with a seagrass bed. | assimilatory nitrate reductase gene fragments were isolated from epiphytes and plankton associated with seagrass blades collected from tampa bay, florida, usa. nitrate reductase genes from diatoms (nr) and heterotrophic bacteria (nasa) were amplified by polymerase chain reaction (pcr) using two sets of degenerate primers. a total of 129 nr and 75 nasa clones from four clone libraries, two from each of epiphytic and planktonic components, were sequenced and aligned. in addition, genomic dna seque ... | 2007 | 17851710 |
| response of bdellovibrio and like organisms (balos) to the migration of naturally occurring bacteria to chemoattractants. | a dual culture-based and non-culture-based approach was applied to characterize predator bacterial groups in surface water samples collected from apalachicola bay, florida. chemotaxis drop assays were performed on concentrated samples in an effort to isolate predator bacteria by their chemotactic ability. yeast extract (ye) and casamino acids (ca) proved to be strong chemoattractants and resulted in three visibly distinct bands; however, dextrose, succinate, pyruvate, and concentrated cells of v ... | 2006 | 17115104 |