Pollen Expressed Genes and Their Regulation
Microsporogenesis in flowering plants involves a complex and extensive program of gene expression (Mascarenhas, 1989; Mascarenhas, 1990). Most of the large number of genes that are expressed in the developing pollen grain are also expressed in sporophytic tissues. Only a small fraction of these genes are pollen-specific and are expressed just in pollen and not in other parts of the plant (Tanksley et al., 1981; Willing & Mascarenhas, 1984; Willing et al., 1988). Pollen-expressed genes from several plants have been isolated and preliminary analyses made of their promoter regions (Albani et al., 1990; Guerrero et al., 1990; Mascarenhas 1991; Twell et al., 1990, 1991; van Tunen et al., 1989, 1990).
KeywordsPromoter Fragment Microprojectile Bombardment Maize Pollen Sporophytic Tissue Pollen Promoter
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