Abstract
AbstractCommercial varieties of transgenic Bacillus thuringiensis (Bt) plants have been developed in many countries to control target pests. Initially, the expression of native Bt genes in plants was low due to mRNA instability, improper splicing, and post‐translation modifications. Subsequently, modifications of the native Bt genes greatly enhanced expression levels. This is a review of the developments that made modern high‐expression transgenic Bt plants possible, with an emphasis on the reasons for the low‐level expression of native Bt genes in plant systems, and the techniques that have been used to improve plant expression of Bt toxin genes.
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