2026-06-02T16:18:00Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/339072026-02-03T11:19:27Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Íñiguez Moreno, Concepción author Heinrich, Sandra author Harms, Lars author López-Gordillo, Francisco Javier author 2017 Ocean acidification and warming are affecting polar regions with particular intensity. Rocky shores of the Antarctic Peninsula are dominated by canopy-forming Desmarestiales. This study investigates the physiological and transcriptomic responses of the endemic macroalga Desmarestia anceps to a combination of different levels of temperature (2 and 7 °C), dissolved CO2 (380 and 1000 ppm), and irradiance (65 and 145 μmol photons m−2 s−1). Growth and photosynthesis increased at high CO2 conditions, and strongly decreased at 2 °C plus high irradiance, in comparison to the other treatments. Photoinhibition at 2 °C plus high irradiance was evidenced by the photochemical performance and intensive release of dissolved organic carbon. The highest number of differentially regulated transcripts was observed in thalli exposed to 2 °C plus high irradiance. Algal 13C isotopic discrimination values suggested an absence of down-regulation of carbon-concentrating mechanisms at high CO2. CO2 enrichment induced few transcriptomic changes. There was high and constitutive gene expression of many photochemical and inorganic carbon utilization components, which might be related to the strong adaptation of D. anceps to the Antarctic environment. These results suggest that increased temperature and CO2 will allow D. anceps to maintain its productivity while tolerating higher irradiances than at present conditions. Concepción Iñiguez, Sandra Heinrich, Lars Harms, Francisco J L Gordillo, Increased temperature and CO2 alleviate photoinhibition in Desmarestia anceps: from transcriptomics to carbon utilization, Journal of Experimental Botany, Volume 68, Issue 14, 8 September 2017, Pages 3971–3984, https://doi.org/10.1093/jxb/erx164 https://hdl.handle.net/10630/33907 10.1093/jxb/erx164 Calentamiento global Océanos - Calentamiento Increased temperature and CO2 alleviate photoinhibition in Desmarestia anceps: from transcriptomics to carbon utilization