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To avoid the unregulated overexpression of the exogenous genes, specific or inducible expression is necessary for some exogenous genes in transgenic plants. But little is known about organ- or tissue-specific promoters in maize. In the present study, the expression of a maize pentatricopeptide repeat (PPR) protein encoding gene, GRMZM2G129783, was analyzed by RNA-sequencing data and confirmed by quantitative...