title: Luminescent whole-cell cyanobacterial bioreporter for measuring Fe availability in diverse marine environments.
abstract: A Synechococcus sp. strain PCC 7002 Fe bioreporter was constructed containing the isiAB promoter fused to the Vibrio harveyi luxAB genes. Bioreporter luminescence was characterized with respect to the free ferric ion concentration in trace metal-buffered synthetic medium. The applicability of the Fe bioreporter to assess Fe availability in the natural environment was tested by using samples collected from the Baltic Sea and from the high-nutrient, low-chlorophyll subarctic Pacific Ocean. Parallel assessment of dissolved Fe and bioreporter response confirmed that direct chemical measurements of dissolved Fe should not be considered alone when assessing Fe availability to phytoplankton.
authors.affiliation: Department of Biological Sciences, Bowling Green State University, Bowling Green, OH 43403, USA.
authors.forename: Ramakrishna
authors.initials: R
authors.lastname: Boyanapalli
authors.forename: George S
authors.initials: GS
authors.lastname: Bullerjahn
authors.forename: Christa
authors.initials: C
authors.lastname: Pohl
authors.forename: Peter L
authors.initials: PL
authors.lastname: Croot
authors.forename: Philip W
authors.initials: PW
authors.lastname: Boyd
authors.forename: R Michael L
authors.initials: RM
authors.lastname: McKay
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D004784:Environmental Monitoring / Q000379:methods; D005290:Ferric Compounds / Q000032:analysis / Q000378:metabolism*; D005418:Flavodoxin / Q000235:genetics / Q000378:metabolism; D017930:Genes, Reporter; D045342:Light-Harvesting Protein Complexes / Q000235:genetics / Q000378:metabolism; D008164:Luminescent Proteins / Q000235:genetics / Q000378:metabolism*; D011401:Promoter Regions, Genetic; D012623:Seawater / Q000737:chemistry*; D046940:Synechococcus / Q000235:genetics / Q000378:metabolism*; D014733:Vibrio / Q000235:genetics / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D005290:Ferric Compounds; D005418:Flavodoxin; D045342:Light-Harvesting Protein Complexes; D008164:Luminescent Proteins; C076726:chlorophyll A binding protein CP43, Cyanobacteria