黄色直播

Sonja Rose聽

PhD Candidate

BSc with Honours (黄色直播, Nova Scotia, Canada)

Research

I am a Dal Biology PhD candidate working with Drs. Julie LaRoche and Erin Bertrand. My research involves the study of a recently cultured diazotroph,聽Candidatus Thalassolittus halegoni. We hope to explore the nitrogen fixation potential and nitrogenase abundancies for this microbe under various carbon substrates and fixed nitrogen sources using聽¹⁵N_2听tracer methods and proteomics. We are also aiming to develop NIFH peptide assays for the identification of nitrogen fixing species. We are initially testing with pure cultures, with the aim of using environmental samples in the future. Overall, we hope that this isolate can be used as a model species for heterotrophic diazotrophs as few are cultured to date and little is understood about their physiology and nitrogen fixation capabilities.聽

Publications

Rose SA, Robicheau BM, Tolman J, Fonseca-Batista D, Rowland E, Desai D, Ratten J-M, Kantor EJH, Comeau AM, Langille MGI, Jerlstr枚m-Hultqvist J, Devred E, Sarthou G, Bertrand EM, LaRoche J. 2024. Nitrogen fixation in the widely distributed marine 纬-proteobacterial diazotroph聽Candidatus聽Thalassolituus haligoni.聽Science Advances 10(31): eadn1476.

Robicheau BM, Tolman J, Rose S, Desai D, LaRoche J. 2023.聽Marine nitrogen-fixers in the Canadian Arctic Gateway are dominated by biogeographically distinct non-cyanobacterial communities. FEMS Microbiology Ecology 99(12): fiad122.