Hormonal regulation of flower development in the tomato (Solanum lycopersicum L.) mutant stamenless

Quinet, Muriel;Bataille, Gwennaël;Motyka, Vaclav;Dobrev, Petre I;Lutts, Stanley
(2014) Auxins and Cytokinins in Plant Development and Interactions with Other Phytohormones (ACPD 2014) — Location: Prague, République Tchèque (29.June.2014)

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Authors
  • Quinet, MurielUCLouvain
    Author
  • Bataille, GwennaëlUCLouvain
    Author
  • Motyka, VaclavAcademy of Sciences of Czech Republic
    Author
  • Dobrev, Petre IAcademy of Sciences of Czech Republic
    Author
  • Lutts, StanleyUCLouvain
    Author
Abstract
Extensive genetic and molecular studies have led to the broadly accepted ABCE model of flower development. Floral homeotic genes encoding transcription factors combinatorially specify organ identity in each floral whorl. However, less is known regarding how these genes control changes at the cellular level during floral organ formation. Recently, an important role for phytohormones as transducers of genetic information during floral development has been suggested in model species. We investigated the hormonal regulation of floral organ development in a strong stamenless (sl-Pr) mutant - in the tomato Primabel cultivar - that exhibits homeotic conversion of petals into sepals and stamens into carpels. This phenotype results from mutations in the coding sequence of the class B Tomato APETALA3 (TAP3) gene. Treatments with phytohormones revealed that gibberellins could partly revert the sl-Pr phenotype but affected neither the SL (TAP3) nor the other ABCE gene expression. Quantification of endogenous polyamines and phytohormones content in the sl flowers along their development showed that the sl-Pr mutation reduced gibberellins, auxins, cytokinins, salicylic acid, spermine and tyramine concentrations and increased jasmonic acid and abscissic acid in tomato flowers. Together, our results revealed a role of phytohormones in flower development downstream of the SL (TAP3) gene in tomato.
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Quinet, M., Bataille, G., Motyka, V., Dobrev, P. I., & Lutts, S. (2014). Hormonal regulation of flower development in the tomato (Solanum lycopersicum L.) mutant stamenless. Auxins and Cytokinins in Plant Development and Interactions with Other Phytohormones (ACPD 2014), Prague, République Tchèque. https://hdl.handle.net/2078.5/230329