Peroxide quantification in Thalassia testudinum tissue and response to pathogenic Labyrinthula in seagrass collected February 2024 in Tampa Bay, Florida

This dataset presents results of peroxide assays and concentrations of hydrogen peroxide from seagrass tissue. While seagrass serve as a vital foundation species in many coastal ecosystems, investigations of marine host-pathogen interactions continue to be underexplored and provide insights into the biological factors leading to seagrass die-offs. Infection of the marine subtropical seagrass Thalassia testudinum (Banks ex König) by pathogenic Labyrinthula sp. was found to induce alterations to the host’s oxidative metabolism over the early stages of infection (monitored over a 72-hr time course). In planta hydrogen peroxide levels provided supporting evidence of a coordinated hypersensitive response in the host plant following infection by the etiological agent of seagrass wasting disease, pathogenic Labyrinthula sp.