Biology:Agamous
AGAMOUS (AG) is a homeotic gene and MADS-box transcription factor protein present in Arabidopsis thaliana. The TAIR AGI number is AT4G18960.
Floral organ identity across flowering plants is determined by particular combinations of the protein products of homeotic genes, which is described by the ABC model of flower development. These proteins act within regions of undifferentiated cells known as the floral meristem and give the cells a developmental fate.[1] In Arabidopsis thaliana, AG functions as a C-class homeotic gene, where if combined with B-class gene function (APETALA3, PISTILLATA), it promotes stamen development.[2] If AG is not combined with any other ABC homeotic genes, it promotes carpel development. Additionally, AG function results in the cessation of all floral meristem activity by repressing WUSCHEL.[3]
In the absence of the AG protein, stamens and carpels do not develop and meristem activity continues, resulting in flowers consisting of many whorls of sepals and petals.[4][5]
Further reading
- "Genetic interactions among floral homeotic genes of Arabidopsis". Development 112 (1): 1–20. May 1991. doi:10.1242/dev.112.1.1. PMID 1685111. http://dev.biologists.org/cgi/pmidlookup?view=long&pmid=1685111.
- "Expression of the Arabidopsis floral homeotic gene AGAMOUS is restricted to specific cell types late in flower development". Plant Cell 3 (8): 749–58. August 1991. doi:10.1105/tpc.3.8.749. PMID 1726485. Bibcode: 1991PlanC...3..749B.
- "Negative regulation of the Arabidopsis homeotic gene AGAMOUS by the APETALA2 product". Cell 65 (6): 991–1002. June 1991. doi:10.1016/0092-8674(91)90551-9. PMID 1675158.
- "The protein encoded by the Arabidopsis homeotic gene agamous resembles transcription factors". Nature 346 (6279): 35–9. July 1990. doi:10.1038/346035a0. PMID 1973265. Bibcode: 1990Natur.346...35Y.
References
- ↑ Weigel, Detlef; Elliot, Meyerowitz (1994). "The ABCs of Floral Homeotic Genes". Cell Press 78: 203-208. https://www.academia.edu/download/31003587/Weigel-Cell-1994.pdf.
- ↑ Coen, Enrico S.; Meyerowitz, Elliot M. (1991). "The war of the whorls: genetic interactions controlling flower development" (in en). Nature 353 (6339): 31–37. doi:10.1038/353031a0. ISSN 1476-4687. https://www.nature.com/articles/353031a0.
- ↑ Lenhard, Michael; Bohnert, Andrea; Jürgens, Gerd; Laux, Thomas (2001). "Termination of Stem Cell Maintenance in Arabidopsis Floral Meristems by Interactions between WUSCHEL and AGAMOUS". Cell 105 (6): 805–814. doi:10.1016/S0092-8674(01)00390-7. ISSN 0092-8674. https://linkinghub.elsevier.com/retrieve/pii/S0092867401003907.
- ↑ Yanofsky, Martin F.; Ma, Hong; Bowman, John L.; Drews, Gary N.; Feldmann, Kenneth A.; Meyerowitz, Elliot M. (1990). "The protein encoded by the Arabidopsis homeotic gene agamous resembles transcription factors". Nature 346: 35-38. https://www.nature.com/articles/346035a0.pdf.
- ↑ Gómez-Mena, Concepción; Folter, Stefan de; Costa, Maria Manuela R.; Angenent, Gerco C.; Sablowski, Robert (2005-02-01). "Transcriptional program controlled by the floral homeotic gene AGAMOUS during early organogenesis" (in en). Development 132 (3): 429–438. doi:10.1242/dev.01600. ISSN 0950-1991. PMID 15634696. https://dev.biologists.org/content/132/3/429.
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