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These findings were consistent with the composition of shikonin/alkannin derivatives in intact Lerythrorhizon plants and cell cultures. Genes encoding both enzymes were preferentially expressed in the roots and cell cultures in the dark in pigment production medium M9, conditions associated with shikonin/alkannin production. These results indicated that LeSAT1 and LeAAT1 are enantiomer-specific acyltransferases that generate various shikonin/alkannin derivatives.Plants have evolved a range of adaptive mechanisms that adjust their devel