Short-term effects of increased CO2, nitrate and temperature on photosynthetic activity in Ulva rigida (Chlorophyta) estimated by different pulse amplitude modulated fluorometers and oxygen evolution

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 72(2021), 2 vom: 02. Feb., Seite 491-509
1. Verfasser: Figueroa, Felix L (VerfasserIn)
Weitere Verfasser: Bonomi-Barufi, Jose, Celis-Plá, Paula S M, Nitschke, Udo, Arenas, Francisco, Connan, Solene, Abreu, Maria Helena, Malta, Erik-J, Conde-Álvarez, Rafael, Chow, Fungyi, Mata, Maria Teresa, Meyerhoff, O, Robledo, Daniel, Stengel, Dagmar B
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't in vivo chlorophyll a fluorescence Acidification climate change electron transport rates nitrate photosystem I and II temperature Nitrates mehr... Chlorophyll 1406-65-1 Carbon Dioxide 142M471B3J Oxygen S88TT14065
Beschreibung
Zusammenfassung:© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
Short-term effects of pCO2 (700-380 ppm; High carbon (HC) and Low carbon (LC), respectively) and nitrate content (50-5 µM; High nitrogen (HN) and Low nitrogen (LN), respectively on photosynthesis were investigated in Ulva rigida (Chlorophyta) under solar radiation (in-situ) and in the laboratory under artificial light (ex-situ). After six days of incubation at ambient temperature (AT), algae were subjected to a 4 °C temperature increase (AT+4 °C) for 3 d. Both in-situ and ex-situ maximal electron transport rate (ETRmax) and in situ gross photosynthesis (GP), measured by O2 evolution, presented highest values under HCHN, and lowest under HCLN, across all measuring systems. Maximal quantum yield (Fv/Fm), and ETRmax of photosystem (PS) II [ETR(II)max] and PSI [ETR(I)max], decreased under HCLN at AT+4 °C. Ex situ ETR was higher than in situ ETR. At noon, Fv/Fm decreased (indicating photoinhibition), whereas ETR(II)max and maximal non-photochemical quenching (NPQmax) increased. ETR(II)max decreased under AT+ 4 °C in contrast to Fv/Fm, photosynthetic efficiency (α ETR) and saturated irradiance (EK). Thus, U. rigida exhibited a decrease in photosynthesis under acidification, changing LN, and AT+4 °C. These results emphasize the importance of studying the interaction between environmental parameters using in-situ versus ex-situ conditions, when aiming to evaluate the impact of global change on marine macroalgae
Beschreibung:Date Completed 13.05.2021
Date Revised 13.05.2021
published: Print
ErratumIn: J Exp Bot. 2021 May 05;:. - PMID 33950179
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/eraa473