Polylactic　acid/polybutylene　adipate-co-terephthalate　blend　(PLA/PBAT)　has　been　widely　used　due　to　their　good　biodegradation.　Recently,　the　biodegradation　of　PLA　and　PBAT　has　received　increasing　attention.　However,　PLA/PBAT　blend-degrading　strains　have　been　rarely　reported　in　comparison　to　that　for　pure　PLA　and　PBAT.　A　fungus　strain,　Papiliotrema　laurentii　S2P4P,　was　isolated　from　agricultural　soils　and　identified.　S2P4P　can　efficiently　degrade　commercial　PLA/PBAT　films　at　30°C　in　mineral　salt　medium　(MSM)　and　obtained　about　14%　of　weight　loss　within　30　days　of　incubation.　Additionally,　rough　and　uneven　surface　of　PLA/PBAT　film　with　cracks　and　creases,　increased　hydrophilicity,　changes　in　mechanical　property,　and　decreased　intensity　of　C=O　and　C-O　bonds　were　observed　after　S2P4P　treatments.　The　strain　secreted　esterase　to　catalyze　the　degradation　of　the　ester　bonds　in　PLA/PBAT　blend,　resulting　in　the　production　of　degradation　products　such　as　butanediol,　adipic　acid,　lactic　acid　and　terephthalic　acid　as　well　as　their　oligomers.　Furthermore,　as　carbon　and　energy　sources,　the　degradation　products　could　participate　in　the　metabolism　of　S2P4P　and　then　accelerate　degradation　of　PLA/PBAT　blend.　The　advantages　of　P.　laurentii　S2P4P　in　simultaneous　degradation　of　PLA　and　PBAT　indicated　that　the　strain　has　potential　value　for　the　bioremediation　of　PLA/PBAT　blend　in　the　actual　environment.　©　2024