One factor, many systems: the floral homeotic protein AGAMOUS and its epigenetic regulatory mechanisms
نویسندگان
چکیده
منابع مشابه
Regulatory elements of the floral homeotic gene AGAMOUS identified by phylogenetic footprinting and shadowing.
In Arabidopsis thaliana, cis-regulatory sequences of the floral homeotic gene AGAMOUS (AG) are located in the second intron. This 3-kb intron contains binding sites for two direct activators of AG, LEAFY (LFY) and WUSCHEL (WUS), along with other putative regulatory elements. We have used phylogenetic footprinting and the related technique of phylogenetic shadowing to identify putative cis-regul...
متن کاملTranscriptional program controlled by the floral homeotic gene AGAMOUS during early organogenesis.
Floral organs, whose identity is determined by specific combinations of homeotic genes, originate from a group of undifferentiated cells called the floral meristem. In Arabidopsis, the homeotic gene AGAMOUS (AG) terminates meristem activity and promotes development of stamens and carpels. To understand the program of gene expression activated by AG, we followed genome-wide expression during ear...
متن کاملArabidopsis floral homeotic gene BELL (BEL1) controls ovule development through negative regulation of AGAMOUS gene (AG).
Ovules are the developmental precursors of seeds. In angiosperms the ovules are enclosed within the central floral organs, the carpels. We have identified a homeotic mutation in Arabidopsis, "bell" (bel1), which causes transformation of ovule integuments into carpels. In situ hybridization analysis shows that this mutation leads to increased expression of the carpel-determining homeotic gene AG...
متن کاملIsolation and characterization of the binding sequences for the product of the Arabidopsis floral homeotic gene AGAMOUS.
The Arabidopsis floral homeotic gene AGAMOUS (AG) is required for normal flower development. The deduced AG protein contains a region which shares substantial sequence similarity with the DNA-binding domains of known transcription factors, SRF (human) and MCM1 (yeast). Therefore, it is likely that AG is also a DNA-binding protein regulating transcription of floral genes. We describe here severa...
متن کاملExpression of the Arabidopsis floral homeotic gene AGAMOUS is restricted to specific cell types late in flower development.
Mutations in the AGAMOUS (AG) gene cause transformations in two adjacent whorls of the Arabidopsis flower. Petals develop in the third floral whorl rather than the normal stamens, and the cells that would normally develop into the fourth whorl gynoecium behave as if they constituted an ag flower primordium. Early in flower development, AG RNA is evenly distributed throughout third and fourth wh...
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ژورنال
عنوان ژورنال: Current Opinion in Plant Biology
سال: 2021
ISSN: 1369-5266
DOI: 10.1016/j.pbi.2021.102009