RT Journal Article
T1 Adaptation of the toxic freshwater cyanobacterium Microcystis aeruginosa to salinity is achieved by the selection of spontaneous mutants.
A1 Melero-Jiménez, Ignacio José
A1 Martín-Clemente, Elena
A1 García-Sánchez, María Jesús
A1 Flores-Moya, Antonio
A1 Bañares-España, Elena
K1 Cianobacterias
K1 Floraciones de cianobacterias
K1 Salinidad
K1 Adaptación (Fisiología)
K1 Genética bacteriana
AB The cyanobacterium Microcystis aeruginosa causes most of the harmful toxic blooms in freshwater ecosystems. Some strains of M. aeruginosa tolerate low‐medium levels of salinity, and because salinization of freshwater aquatic systems is increasing worldwide it is relevant to know what adaptive mechanisms allow tolerance to salinity. The mechanisms involved in the adaptation of M. aeruginosa to salinity (acclimation vs. genetic adaptation) were tested by a fluctuation analysis design, and then the maximum capacity of adaptation to salinity was studied by a ratchet protocol experiment. Whereas a dose of 10 g NaCl L−1 completely inhibited the growth of M. aeruginosa, salinity‐resistant genetic variants, capable of tolerating up to 14 g NaCl L−1, were isolated in the fluctuation analysis experiment. The salinity‐resistant cells arose by spontaneous mutations at a rate of 7.3 × 10−7 mutants per cell division. We observed with the ratchet protocol that three independent culture populations of M. aeruginosa were able to adapt to up to 15.1 g L−1 of NaCl, suggesting that successive mutation‐selection processes can enhance the highest salinity level to which M. aeruginosa cells can initially adapt. We propose that increasing salinity in water reservoirs could lead to the selection of salinity‐resistant mutants of M. aeruginosa.
PB Wiley
YR 2019
FD 2019-03-20
LK https://hdl.handle.net/10630/41477
UL https://hdl.handle.net/10630/41477
LA eng
NO Melero‐Jiménez, I. J., Martín‐Clemente, E., García‐Sánchez, M. J., Flores‐Moya, A., & Bañares‐España, E. (2019). Adaptation of the toxic freshwater cyanobacterium Microcystis aeruginosa to salinity is achieved by the selection of spontaneous mutants. Phycological Research, 67(3), 192-201.
NO https://openpolicyfinder.jisc.ac.uk/id/publication/3694?from=single_hit
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026