“…PRP gene expression is associated with early stages of legume root nodule formation (Franssen et al, 1987;van de Wiel et al, 1990;Wilson et al, 1994), soybean seedling, leaf, stem, and seed coat development (Hong et al, 1989;Kleis-San Francisco and Tierney, 1990;Lindstrom and Vodkin, 1991;Ye et al, 1991), bean seedling growth (Sheng et al, 1991), and with early stages of tomato fruit development (Santino et al, 1997). The spatial pattern of PRP expression is also tightly regulated, as shown by in situ hybridization and reporter gene expression analysis (Wyatt et al, 1992;Suzuki et al, 1993). For example, the soybean SbPRP1 and SbPRP2 transcripts have been localized to sclereids, the inner integument of the seed coat and the epidermal, cortical, and endodermoidal cells of young seedlings.…”