RT journal article
T1 Polyunsaturated Aldehydes Profile in the Diatom Cyclotella cryptica Is Sensitive to Changes in Its Phycosphere Bacterial Assemblages
A1 Hernanz Torrijos, María
A1 Ortega Agüera, María Jesús
A1 Bartual Magro, Ana
A1 Ubeda Sánchez, Bárbara
A2 Biología
A2 Química Orgánica
K1 diatom–bacteria interaction
K1 infochemical
K1 PUA
K1 PUFA
AB Diatoms are responsible for the fixation of ca. 20% of the global CO2 and live associated with bacteria that utilize the organic substances produced by them. Current research trends in marine microbial ecology show which diatom and bacteria interact mediated through the production and exchange of infochemicals. Polyunsaturated aldehydes (PUA) are organic molecules released by diatoms that are considered to have infochemical properties. In this work, we investigated the possible role of PUA as a mediator in diatom–bacteria interactions. To this end, we compare the PUA profile of a newly isolated oceanic PUA producer diatom, Cyclotella cryptica, co-cultured with and without associated bacteria at two phosphate availability conditions. We found that the PUA profile of C. cryptica cultured axenically was different than its profile when it was co-cultured with autochthonous (naturally associated) and non-autochthonous bacteria (unnaturally inoculated). We also observed that bacterial presence significantly enhanced diatom growth and that C. cryptica modulated the percentage of released PUA in response to the presence of bacteria, also depending on the consortium type. Based on our results, we propose that this diatom could use released PUA as a specific organic matter sign to attract beneficial bacteria for constructing its own phycosphere, for more beneficial growth.
PB Multidisciplinary Digital Publishing Institute (MDPI)
SN 1660-3397
YR 2023
FD 2023
LK http://hdl.handle.net/10498/31885
UL http://hdl.handle.net/10498/31885
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026