The SELF-PRUNING gene family in tomato

Area of Science:

• Plant Biology
• Developmental Genetics
• Molecular Evolution

Background:

• The SELF PRUNING (SP) gene dictates tomato growth habits by regulating the vegetative-reproductive switch.
• SP is homologous to known developmental regulators like CENTRORADIALIS and TERMINAL FLOWER 1/FLOWERING LOCUS T.
• Understanding the SP gene family is key to deciphering plant architecture control.

Purpose of the Study:

• To characterize the SP gene family in tomato.
• To compare the SP gene family in tomato with its Arabidopsis counterparts.
• To lay the groundwork for functional analysis of this gene family.

Main Methods:

• Sequence analysis of the SP gene family in tomato.
• Comparative analysis of gene homology and genomic organization with Arabidopsis.
• Examination of organ expression patterns of tomato SP gene family members.

Main Results:

• Identified at least six members of the SP gene family in tomato, absent from EST collections.
• SP gene family members show significant homology and conserved intron-exon structure between tomato and Arabidopsis.
• Phylogenetically close tomato homologues exhibit distinct organ expression, while SP2I and Arabidopsis MFT show constitutive expression.

Conclusions:

• The SP gene family is conserved in tomato and Arabidopsis regarding sequence and genomic structure.
• Divergence in organ expression patterns among tomato homologues suggests specialized roles.
• This study provides a foundation for future functional studies of the SP gene family in determining plant architecture.