{"id":212,"date":"2026-02-24T05:58:32","date_gmt":"2026-02-24T13:58:32","guid":{"rendered":"https:\/\/dornsife.usc.edu\/hutchinslab\/?p=212"},"modified":"2026-02-24T05:58:33","modified_gmt":"2026-02-24T13:58:33","slug":"phytoplankton-biochemistry-cell-function","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/hutchinslab\/research-scope\/phytoplankton-biochemistry-cell-function\/","title":{"rendered":"Phytoplankton Biochemistry & Cell Function"},"content":{"rendered":"\n\n\n\n\n \n \n\n\n\n\n\n\n\n
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Phytoplankton Biochemistry & Cell Function<\/h1>\n\n\n<\/div>\n \n \n \n February 24, 2026<\/span>\n <\/div>\n<\/div>\n\n\n <\/div><\/div>\n\n \n \n\n\n\n\n\n\n\n
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Phytoplankton drive marine productivity and global biogeochemical cycles through their biochemical composition and cellular processes. At the Hutchins-Fu Lab, we study how environmental stressors\u2014such as nutrient limitation, temperature shifts, and ultraviolet radiation\u2014alter the internal chemistry, metabolic activity, and ecological role of marine phytoplankton.<\/p>\n

\n

Focus Areas<\/h3>\n

1. Elemental Stoichiometry and Climate Change<\/strong>
\nWe investigate how phytoplankton adjust their internal carbon, nitrogen, phosphorus, and iron ratios under warming and nutrient-limited conditions. These shifts alter both cellular efficiency and the broader cycling of nutrients and carbon in the ocean.<\/p>\n

    \n
  • Example: Our 2024 Nature Geoscience<\/em> paper explored how phytoplankton feedbacks influence nutrient cycles under warming conditions.<\/li>\n
  • Our studies show that environmental changes can decouple elemental ratios from traditional Redfield patterns, with implications for productivity and export flux.<\/li>\n<\/ul>\n

    2. Nutrient Co-Limitation and Adaptive Physiology<\/strong>
    \nPhytoplankton in the open ocean often experience multiple simultaneous resource limitations. We examine how co-limitation by iron and phosphorus affects metabolism, gene expression, and growth dynamics.<\/p>\n

      \n
    • In Crocosphaera<\/em>, we identified coordinated molecular responses to Fe\u2013P co-limitation (2022 ISME Journal<\/em>), revealing how cells integrate multiple stress signals.<\/li>\n<\/ul>\n

      3. Proteomic Shifts Under Thermal and Metal Stress<\/strong>
      \nWe use proteomics to analyze how phytoplankton rewire their biochemistry in response to heat and trace metal availability. In Synechococcus<\/em>, we\u2019ve shown distinct protein expression profiles between coastal and oceanic ecotypes under warming and iron limitation (2024 Frontiers in Microbiology<\/em>).<\/p>\n

      4. UV Radiation, Viral Interactions, and Toxicity<\/strong>
      \nEnvironmental stressors modify phytoplankton-virus dynamics and toxin production. Our lab demonstrated that UV radiation can reduce virus-driven impacts on host phytoplankton under warming (2025 Plant Cell and Environment<\/em>), and that warming can increase domoic acid toxicity in Pseudo-nitzschia<\/em> (2023 Harmful Algae<\/em>).<\/p>\n

      \n

      Why It Matters<\/h3>\n

      Phytoplankton biochemistry connects cellular stress responses to global-scale processes. Understanding how these organisms adjust their internal function under climate change helps refine predictions of ocean productivity, carbon sequestration, and ecosystem health.<\/p>\n\n\n\n<\/div>\n\n\n <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

      Phytoplankton drive marine productivity and global biogeochemical cycles through their biochemical composition and cellular processes. At the Hutchins-Fu Lab, we study how environmental stressors\u2014such as nutrient limitation, temperature shifts, and ultraviolet radiation\u2014alter the internal chemistry, metabolic activity, and ecological role of marine phytoplankton.<\/p>\n","protected":false},"author":1121,"featured_media":217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-scope"],"acf":[],"yoast_head":"\nPhytoplankton Biochemistry & Cell Function<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dornsife.usc.edu\/hutchinslab\/research-scope\/phytoplankton-biochemistry-cell-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Phytoplankton Biochemistry & Cell Function - Hutchins Lab\" \/>\n<meta property=\"og:description\" content=\"Phytoplankton drive marine productivity and global biogeochemical cycles through their biochemical composition and cellular processes. 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