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The increasing resistance of bacteria and fungi to currently available antibiotics is a major concern worldwide, leading to enormous effort to develop novel antibiotics with new modes of action.We recently reported that ABP-dHC-cecropin A exhibited strong antibacterial and antifungal activity, making it a candidate antibiotic substitute. In this study, β-cyclodextrin (β-CD) combined with ABP-dHC-cecropin A enhanced the physical and chemical properties of ABP-dHC-cecropin A but did not significantly decrease its antibacterial activity. Thus, β-CD/ABP-dHC-cecropin A should be considered a novel antibacterial drug. We used β-CD/ABP-dHC-cecropin A as an anti- Agrobacterium compound to supplementtransgenic poplar medium. Sideeffects of the inclusion complex had little impact on plantgrowth. Thus, β-CD/ABP-dHC-cecropin A may be used as traditional antibiotics forpoplar transplantation with greater antibbacterial effects. [ABSTRACT FROM AUTHOR]