Seawater carbonate chemistry and photoprotective strategies controlling electron flow through PSII and PSI in red macroalgae Pyropia yezoensis ...

• Main Authors: Zhang, Di, Xu, Juntian, Beer, Sven, Beardall, John, Zhou, Cong, Gao, Kunshan
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Coast and continental shelf; Laboratory experiment; Light; Macroalgae; North Pacific; Plantae; Primary production/Photosynthesis; Pyropia yezoensis; Rhodophyta; Single species; Temperate; Type; Species; Registration number of species; Uniform resource locator/link to reference; Experiment duration; Treatment; Oxygen evolving complex activity; Oxygen evolving complex activity, standard deviation; Photochemical quantum yield; Photochemical quantum yield, standard deviation; Photosystem II acceptor side activity; Photosystem II acceptor side activity, standard deviation; Quantum yield of electron transport; Quantum yield of electron transport, standard deviation; Photosystem I donor side activity; Photosystem I donor side activity, standard deviation; Quantum yield for reduction of Photosystem I acceptor side; Quantum yield for reduction of Photosystem I acceptor side, standard deviation; Effective quantum yield; Effective quantum yield, standard deviation; Activity of cyclic electron transport around Photosystem I; Activity of cyclic electron transport around Photosystem I, standard deviation; Temperature, water; Temperature, water, standard deviation; Salinity; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.941921; https://doi.pangaea.de/10.1594/PANGAEA.941921

While intertidal macroalgae are exposed to drastic changes in solar photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) during a diel cycle, and to ocean acidification (OA) associated with increasing CO2 levels, little is known about their photosynthetic performance under the combined influences of these drivers. In this work, we examined the photoprotective strategies controlling electron flow through photosystems II (PSII) and photosystem I (PSI) in response to solar radiation with or without UVR and an elevated CO2 concentration in the intertidal, commercially important, red macroalgae Pyropia (previously Porphyra) yezoensis. By using chlorophyll fluorescence techniques, we found that high levels of PAR alone induced photoinhibition of the inter-photosystem electron transport carriers, as evidenced by the increase of chlorophyll fluorescence in both the J- and I-steps of Kautsky curves. In the presence of UVR, photoinduced inhibition was mainly identified in the O2-evolving complex ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2022-3-1. ...