[A novel gene Bractea (bra) controls the formation of an indeterminate bractless inflorescence in Arabidopsis thaliana].
The morphological and genetic studies of the bra mutant of Arabidopsis thaliana (L.) Heynh. from the collection of the Department of Genetics and Breeding, Moscow State University, showed that the BRA gene controls the main stages of inflorescence development: it suppresses the development of leaflike organs subtending flowers (bracts) and inhibits the formation of the terminal flower. Inactivation of the BRA gene leads to the transition from the indeterminate bractless inflorescence characteristic of the family Cruciferaceae to the determinate bracteose inflorescence. The BRA gene plays a regulatory role and was probably involved in the conversion of the bracteose determinate inflorescence to the bractless indeterminate inflorescence during the origin of ancestral crucifers.
Ezhova
T A
TA
Lomonosov Moscow State University, Moscow, 119899 Russia. tatiana@tezhova.home.bio.msu.ru
Penin
A A
AA
D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D009154:Mutation