首页|Effects of Ocean Acidification on Nitrogen Metabolism of Skeletonema costatum
Effects of Ocean Acidification on Nitrogen Metabolism of Skeletonema costatum
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Ocean acidification(OA),caused by the rising concentration of atmospheric CO2,leads to changes in the marine car-bonate system.This,in turn,affects the physiological processes of phytoplankton.In response to increased pCO2 levels,marine mi-croalgae modulate their physiological responses to meet their energy and metabolic requirements.Nitrogen metabolism is a critical metabolic pathway,directly affecting the growth and reproductive capacity of marine microorganisms.Understanding the molecular mechanisms that regulate nitrogen metabolism in microalgae under OA conditions is therefore crucial.This study aimed to investi-gate how OA affects the expression profiles of key genes in the nitrogen metabolic pathway of the marine diatom Skeletonema co-statum.Our findings indicate that OA upregulates key genes involved in the nitrogen metabolic pathway,specifically those related to nitrate assimilation and glutamate metabolism.Moreover,pCO2 has been identified as the predominant factor affecting the expres-sion of these genes,with a more significant impact than pH variations in S.costatum.This research not only advances our under-standing of the adaptive mechanisms of S.costatum in response to OA but also provides essential data for predicting the ecological consequences of OA on marine diatoms.
Key Laboratory of Marine Environment and Ecology,Ministry of Education,College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China
Laboratory for Marine Ecology and Environmental Science,Qingdao Marine Science and Technology Center,Qingdao 266237,China
Frontiers Science Center for Deep Ocean Multispheres and Earth System,Ocean University of China,Qingdao 266100,China
Scientific and Technological Innovation Project of the Laoshan LaboratoryNational Key Research and Development Program of ChinaNational Natural Science Foundation of China
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