![]() ![]() Tomato exhibits a sympodial growth pattern ( Fig. ![]() By contrast, the homologous SELF- PRUNING ( SP) gene of tomato ( Solanum lycopersicum)-which together with CEN and TFL1 defines the CETS gene family ( Pnueli et al., 1998, 2001)-might have a different function because the sp mutation does not alter inflorescence structure, but rather changes whole plant architecture ( Yeager, 1927 MacArthur, 1932). Consistent with this role, both genes are expressed at high level in the inflorescence SAM and their mutation converts the SAM into a terminal flower. ![]() During flowering, the CENTRORADIALIS ( CEN) gene of Antirrhinum majus and its homolog TERMINAL FLOWER1 ( TFL1) in Arabidopsis ( Arabidopsis thaliana) are required to maintain inflorescence identity of the shoot apical meristem (SAM) while flower meristems are produced on its flanks ( Bradley et al., 1996, 1997). ![]()
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