MADS-box genes controlling inflorescence morphogenesis in sunflower

O.A. Shulga, A.V. Shchennikova, G.C. Angenent, K.G. Skryabin

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)


MADS-box genes play an important role in plant ontogeny, particularly, in the regulation of floral organ induction and development. Eight full-length cDNAs of HAM genes (Helianthus annuus MADS) have been isolated from sunflower. They encode MADS-box transcription factors expressed in inflorescence tissues. In the frames of the ABCDE model, the HAM proteins were classified according to their structural homology to known MADS-box transcription factors. The HAM45 and HAM59 genes encode the homeotic C function and are involved in the control of the identity of pistil and stamens, while the HAM75 and HAM92 genes determine the A function and identity of floral and inflorescence meristems and petal identity. The HAM31, HAM2, HAM63, and HAM91 genes encode the B function and are involved in the formation of petals and stamens; and the HAM137 gene encodes the E function. Analysis of the expression of HAM genes in sunflower has demonstrated that the structural and functional differences between the ray and tubular flowers in the inflorescence could be a consequence of the lack of HAM59 expression during ray flower initiation.
Original languageEnglish
Pages (from-to)2-5
JournalRussian Journal of Developmental Biology
Issue number1
Publication statusPublished - 2008


  • flower development
  • ovule development
  • gerbera-hybrida
  • arabidopsis
  • expression
  • proteins
  • petunia
  • evolution
  • tissues
  • leaves

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