RT Conference Proceedings
T1 Disentangling mechanisms involved in the adaptation of the cyanobacterium Microcystis aeruginosa to the extreme sulphureous water from Los Baños de la Hedionda (S Spain)
A1 Martín-Clemente, Elena
A1 Melero-Jiménez, Ignacio José
A1 Reul, Andreas
A1 Hernández-López, Miguel
A1 Salvo-Tierra, Ángel Enrique
A1 Bañares-España, Elena
A1 García-Sánchez, María Jesús
A1 Flores-Moya, Antonio
K1 Cianobacterias
AB Backgrounds Los Baños de la Hedionda (Málaga, S Spain) is a natural sulphureous spa where sulphide can reach a concentration of 150-200 µM. Although this ion has biocide properties, including inhibition of the photosynthetic process, a rich flora can be found in this extreme environment.Objectives To study the adaptation mechanisms allowing resistance of photosynthetic microorganisms to these sulphureous watersMethods For this purpose, a modified Luria–Delbrück fluctuation analysis was carried out. The adaptation to La Hedionda waters of three different strains of the cyanobacterium Microcystis aeruginosa (Kützing) Kützing (isolated from a non-sulphureous freshwater reservoir) was analyzed in order to find out if it was achieved by a physiological adaptation process (acclimation) or by the selection of rare spontaneous mutations (genetic adaptation). Conclusions Several resistant strains were obtained after 6 weeks of cultivation with La Hedionda waters. The fluctuation analysis showed that genetic adaptation was the phenomenon that allowed resistant M. aeruginosa cells from the three strains to survive, with similar mutation rates in the order of magnitude of 1 mutant resistant cell per 106-107 cell division-1. It could be hypothesized that this cyanobacterium could adapt to sulphureous environment by the selection of favoured mutants.
YR 2017
FD 2017-09-15
LK http://hdl.handle.net/10630/14472
UL http://hdl.handle.net/10630/14472
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.Spanish Ministry of Science and Innovation through CGL2014-53682-P project. Predoctoral State Grant from Scientific and Technical Research and Innovation Plan, Spanish Ministry of Economy, Industry and Competitiveness I+D+i ECC/1402/2013, 2015
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026