A novel MYB-like gene (AtMYB103) was isolated from a genomic library of Arabidopsis. Plants transgenic for chimeric AtMYB103 promoter/GUS genes expressed the enzyme in early anthers. In situ hybridization of flower sections showed a high level of AtMYB103 mRNA in the tapetum and middle layer of developing anthers.
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Li et al. (1999) studied this question.
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