Genetic and morphological analysis of floral homeotic mutants tepal-like bract and fagopyrum apetala of Fagopyrum esculentum

Maria D. Logacheva, Ivan N. Fesenko, Aleksey N. Fesenko, Aleksey A. Penin

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The studies on floral homeotic mutants of the model plant species Arabidopsis thaliana (L.) Heynh. and Antirrhinum majus L. have clarified many important aspects of the genetic control of flower development. However, the details of this process can vary in species representing different lineages of flowering plants. The studies on floral homeotic mutants of nonmodel plant species may significantly improve the understanding of the mechanisms of morphological evolution of flowers. We report here the results of the genetic and morphological analysis of two floral homeotic mutants of common buckwheat (Fagopyrum esculentum Moench.). The mutant, tepal-like bract (tlb), is characterized by the transformation of bracts into petaloid organs, whereas fagopyrum apetala (fap), has a carpelloid perianth. Both mutant phenotypes are caused by a single recessive nuclear mutation. The double mutant fap tlb combines the features of tlb and fap. Our results show that single gene mutations are sufficient to convert the buckwheat bract into a tepal and to confer carpel identity on first whorl organs. These results are consistent with the premise that variations on the ABC model can be used to explain a wide range of floral architectures.

Original languageEnglish
Pages (from-to)367-375
Number of pages9
JournalBotany
Volume86
Issue number4
DOIs
Publication statusPublished - Apr 2008
Externally publishedYes

Keywords

  • ABC model
  • Fagopyrum
  • Flower development
  • Homeosis
  • Homeotic mutants

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