  Stellar bars have been found to substantially influence the stellar
populations properties in galaxies, affecting their ability of forming stars.
While this can be easily seen when studying galaxies in relatively isolated
environments, such kind of analysis takes a higher degree of complexity when
cluster galaxies are considered, due to the variety of interactions which can
potentially occur in these denser environments. We use IFU MUSE data from the
GASP survey to study the combined effect of the presence of a stellar bar and
of ram pressure, on spatially resolved properties of stellar populations. We
have analyzed spatially resolved indicators of both recent SFR and average
stellar population ages to check for signatures of anomalous central SF
activity, also taking into account for the possible presence of nuclear
activity. We found an increase of central SFR in ram pressure affected galaxies
when compared with unperturbed ones. The most extreme cases of increase SFR and
central rejuvenation occur in barred galaxies that are at advanced stages of
ram pressure stripping. For low-mass barred galaxies affected by ram pressure,
the combined effect is a systematic enhancement of the star formation activity
as opposed to the case of high-mass galaxies that present both enhancement and
suppression. Barred galaxies that present a suppression of their star formation
activity also present signatures of nuclear activity. Our results indicate that
the combined effect of the presence of a bar and a strong perturbation by ram
pressure is able to trigger the central SF activity and probably ignite nuclear
activity.
