Moreover, to enhance xylose assimilation, the L. plantarum DldhL1::PxylABDxpk1:: tkt-Dxpk2::PxylAB mutant was developed, in which the integration of two copies of xylAB into the genome resulted in the production of 41.0 g/L lactic acid with a yield of 0.88 g/g xylose after a 42-h cultivation