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In this paper we present results from a radio-optical study of the galaxypopulations of the galaxy clusters Abell 1300 and MACS J1931.8$-$2634, a mergerand a relaxed system respectively both located at $z \sim 0.3$, aimed atfinding evidence of merger-induced radio emission. Radio observations are takenat 1.28 GHz with the MeerKAT interferometer during its early-stagecommissioning phase, and combined with archive optical data. We generatedcatalogues containing 107 and 162 radio sources in the A$~$1300 and MACSJ1931.8--2634 cluster fields respectively, above a 0.2 mJy threshold and withina 30~arcmin radius from the cluster centre (corresponding to 8.1 and 8.8 Mpcrespectively). By cross-correlating the radio and optical catalogues, andincluding spectroscopic information, 9 and 6 sources were found to be clustermembers and used to construct the radio luminosity functions respectively forboth clusters. The comparison of the radio source catalogues between the twocluster fields leads to a marginal difference, with a $2\sigma$ statisticalsignificance. We derived the radio luminosity function at 1.28 GHz in bothclusters, in the power range $22.81 < \rm {log~P_{1.28~GHz}~(W/Hz)} < 25.95$,and obtained that in A 1300 the radio luminosity function averaged over thefull radio power interval is only $3.3 \pm 1.9$ times higher than the MACSJ1931.8--2634 one, suggesting no statistical difference in their probability tohost nuclear radio emission. We conclude that, at least for the two clustersstudied here, the role of cluster mergers in affecting the statisticalproperties of the radio galaxy population is negligible.

A MeerKAT view on galaxy clusters: a radio-optical study of Abell 1300 and MACS J1931.8--2634