Dynamic Photophysiological Stress Response of a Model Diatom to Ten Environmental Stresses
| Autor: | Wei Li, Yingyu Hu, Yong Zhang, Zoe V. Finkel, Rosie M. Sheward, Zheng-Ke Li, Andrew J. Irwin |
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| Rok vydání: | 2020 |
| Předmět: |
Diatoms
Quenching (fluorescence) biology Nitrogen Phosphorus Thalassiosira pseudonana Irradiance chemistry.chemical_element Plant Science Aquatic Science biology.organism_classification Acclimatization Diatom chemistry Stress Physiological Phytoplankton Biophysics Photosynthesis Absorption (electromagnetic radiation) |
| Zdroj: | Journal of phycology. 57(2) |
| ISSN: | 1529-8817 |
| Popis: | Stressful environmental conditions can induce many different acclimation mechanisms in marine phytoplankton, resulting in a range of changes in their photophysiology. Here we characterize the common photophysiological stress response of the model diatom Thalassiosira pseudonana to ten environmental stressors and identify diagnostic responses to particular stressors. We quantify the magnitude and temporal trajectory of physiological parameters including the functional absorption cross-section of PSII (σPSII ), quantum efficiency of PSII, non-photochemical quenching (NPQ), cell volume, Chl a, and carotenoid (Car) content in response to nutrient starvation (nitrogen (N), phosphorus (P), silicon (Si), and iron (Fe)), changes in temperature, irradiance, pH, and reactive oxygen species (ROS) over 5 time points (0, 2, 6, 24, 72 h). We find changes in conditions: temperature, irradiance, and ROS, often result in the most rapid changes in photophysiological parameters ( |
| Databáze: | OpenAIRE |
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