RT Journal Article
T1 Increased temperature and CO2 alleviate photoinhibition in Desmarestia anceps: from transcriptomics to carbon utilization
A1 Íñiguez Moreno, Concepción
A1 Heinrich, Sandra
A1 Harms, Lars
A1 López-Gordillo, Francisco Javier
K1 Calentamiento global
K1 Océanos - Calentamiento
AB 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.
PB Oxford University Press
YR 2017
FD 2017
LK https://hdl.handle.net/10630/33907
UL https://hdl.handle.net/10630/33907
LA eng
NO 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
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026