A PLENA-like gene of peach is involved in carpel formation and subsequent transformation into a fleshy fruit.
MADS-box genes have been shown to play a role in the formation of fruits, both in Arabidopsis and in tomato. In peach, two C-class MADS-box genes have been isolated. Both of them are expressed during flower and mesocarp development. Here a detailed analysis of a gene that belongs to the PLENA subfamily of MADS-box genes is shown. The expression of this PLENA-like gene (PpPLENA) increases during fruit ripening, and its ectopic expression in tomato plants causes the transformation of sepals into carpel-like structures that become fleshy and ripen like real fruits. Interestingly, the transgenic berries constitutively expressing the PpPLENA gene show an accelerated ripening, as judged by the expression of genes that are important for tomato fruit ripening. It is suggested that PpPLENA might interfere with the endogenous activity of TAGL1, thereby activating the fruit ripening pathway earlier compared with wild-type tomato plants.
Tadiello
Alice
A
Dipartimento di Biologia, Università di Padova, 35131 Padova, Italy.
Pavanello
Anna
A
Zanin
Dario
D
Caporali
Elisabetta
E
Colombo
Lucia
L
Rotino
Giuseppe L
GL
Trainotti
Livio
L
Casadoro
Giorgio
G
D035264:Flowers / Q000166:cytology / Q000235:genetics* / Q000254:growth & development* / Q000648:ultrastructure; D005638:Fruit / Q000235:genetics* / Q000254:growth & development*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018551:Solanum lycopersicum / Q000235:genetics; D026161:MADS Domain Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D027861:Prunus / Q000235:genetics*
D026161:MADS Domain Proteins