CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment
Presentación oral al congreso Ocean acidification and warming are affecting with special intensity the polar coastal ecosystems. The Arctic kelps Saccharina latissima and Laminaria solidungula from Kongsfjorden (Svalbard) were cultured at 4 and 9 ºC in combination with current (390 ppm, CC) and incr...
Main Authors: | , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10630/12212 |
id |
ftunivmalaga:oai:riuma.uma.es:10630/12212 |
---|---|
record_format |
openpolar |
spelling |
ftunivmalaga:oai:riuma.uma.es:10630/12212 2024-06-23T07:47:51+00:00 CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment Íñiguez Moreno, Concepción Heinrich, Sandra López-Gordillo, Francisco Javier 2016 http://hdl.handle.net/10630/12212 eng eng The IXth International symposium on inorganic carbon utilization by aquatic photosynthetic organisms Cambridge, Reino Unido 15-17 Agosto 2016 http://hdl.handle.net/10630/12212 orcid:0000-0003-1302-7213 info:eu-repo/semantics/openAccess by-nc-nd Fotosíntesis Carbon concentrating mechanisms Photosynthesis Seaweeds Polar info:eu-repo/semantics/conferenceObject 2016 ftunivmalaga 2024-06-04T14:31:53Z Presentación oral al congreso Ocean acidification and warming are affecting with special intensity the polar coastal ecosystems. The Arctic kelps Saccharina latissima and Laminaria solidungula from Kongsfjorden (Svalbard) were cultured at 4 and 9 ºC in combination with current (390 ppm, CC) and increased (1200 ppm, HC) levels of atmospheric CO2. The Antarctic endemic Desmarestia anceps and D. menziesii were cultured at 2 and 7 ºC, and also at CC and HC.For all these species ∂13C values suggested an absence of deactivation of carbon concentrating mechanisms at increased CO2 levels. The lack of inhibition of CCM at high CO2 shown by ∂13C values seems to be a common pattern in polar species, but it is not related to responses in photosynthesis and growth. Growth of both Arctic species were largely unaffected by increased CO2 conditions, regardless the temperature. In contrast, the Antarctic species were favored by high CO2, specially at the highest temperature. External carbonic anhydrase (eCA) was responsible for about 50% to 80% of the photosynthetic O2 evolution in all the species, according to inhibition assays using DBS. CO2 promoted a decrease in eCA contribution to O2 evolution in the Antarctic species but not in the Arctic ones. The addition of EZ did not promote further inhibition in any species, indicating a low relevance of internal CA, although a concomitant inhibition of eCA may mask this contribution if no other mechanism of active transport was operating. Our latest results of the gene expression of D. anceps reveal that there is a low response to CO2. The relevance of this resilience to CO2 in polar environments will be discussed. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Conference Object Antarc* Antarctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Svalbard RIUMA - Repositorio Institucional de la Universidad de Málaga Arctic Antarctic The Antarctic Svalbard |
institution |
Open Polar |
collection |
RIUMA - Repositorio Institucional de la Universidad de Málaga |
op_collection_id |
ftunivmalaga |
language |
English |
topic |
Fotosíntesis Carbon concentrating mechanisms Photosynthesis Seaweeds Polar |
spellingShingle |
Fotosíntesis Carbon concentrating mechanisms Photosynthesis Seaweeds Polar Íñiguez Moreno, Concepción Heinrich, Sandra López-Gordillo, Francisco Javier CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
topic_facet |
Fotosíntesis Carbon concentrating mechanisms Photosynthesis Seaweeds Polar |
description |
Presentación oral al congreso Ocean acidification and warming are affecting with special intensity the polar coastal ecosystems. The Arctic kelps Saccharina latissima and Laminaria solidungula from Kongsfjorden (Svalbard) were cultured at 4 and 9 ºC in combination with current (390 ppm, CC) and increased (1200 ppm, HC) levels of atmospheric CO2. The Antarctic endemic Desmarestia anceps and D. menziesii were cultured at 2 and 7 ºC, and also at CC and HC.For all these species ∂13C values suggested an absence of deactivation of carbon concentrating mechanisms at increased CO2 levels. The lack of inhibition of CCM at high CO2 shown by ∂13C values seems to be a common pattern in polar species, but it is not related to responses in photosynthesis and growth. Growth of both Arctic species were largely unaffected by increased CO2 conditions, regardless the temperature. In contrast, the Antarctic species were favored by high CO2, specially at the highest temperature. External carbonic anhydrase (eCA) was responsible for about 50% to 80% of the photosynthetic O2 evolution in all the species, according to inhibition assays using DBS. CO2 promoted a decrease in eCA contribution to O2 evolution in the Antarctic species but not in the Arctic ones. The addition of EZ did not promote further inhibition in any species, indicating a low relevance of internal CA, although a concomitant inhibition of eCA may mask this contribution if no other mechanism of active transport was operating. Our latest results of the gene expression of D. anceps reveal that there is a low response to CO2. The relevance of this resilience to CO2 in polar environments will be discussed. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. |
format |
Conference Object |
author |
Íñiguez Moreno, Concepción Heinrich, Sandra López-Gordillo, Francisco Javier |
author_facet |
Íñiguez Moreno, Concepción Heinrich, Sandra López-Gordillo, Francisco Javier |
author_sort |
Íñiguez Moreno, Concepción |
title |
CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
title_short |
CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
title_full |
CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
title_fullStr |
CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
title_full_unstemmed |
CCm performance in Arctic and Antarctic seaweeds in a warming and acidifying marine environment |
title_sort |
ccm performance in arctic and antarctic seaweeds in a warming and acidifying marine environment |
publishDate |
2016 |
url |
http://hdl.handle.net/10630/12212 |
geographic |
Arctic Antarctic The Antarctic Svalbard |
geographic_facet |
Arctic Antarctic The Antarctic Svalbard |
genre |
Antarc* Antarctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Svalbard |
genre_facet |
Antarc* Antarctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Svalbard |
op_relation |
The IXth International symposium on inorganic carbon utilization by aquatic photosynthetic organisms Cambridge, Reino Unido 15-17 Agosto 2016 http://hdl.handle.net/10630/12212 orcid:0000-0003-1302-7213 |
op_rights |
info:eu-repo/semantics/openAccess by-nc-nd |
_version_ |
1802638068910391296 |