Agamous

For other uses, see Agamy.

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]

agamous mutant with repeating whorls of sepals and petals.

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

  • Bowman JL, Smyth DR, Meyerowitz EM (May 1991). "Genetic interactions among floral homeotic genes of Arabidopsis". Development. 112 (1): 1–20. doi:10.1242/dev.112.1.1. PMID 1685111.
  • Bowman JL, Drews GN, Meyerowitz EM (August 1991). "Expression of the Arabidopsis floral homeotic gene AGAMOUS is restricted to specific cell types late in flower development". Plant Cell. 3 (8): 749–58. Bibcode:1991PlanC...3..749B. doi:10.1105/tpc.3.8.749. PMC 160042. PMID 1726485.
  • Drews GN, Bowman JL, Meyerowitz EM (June 1991). "Negative regulation of the Arabidopsis homeotic gene AGAMOUS by the APETALA2 product". Cell. 65 (6): 991–1002. doi:10.1016/0092-8674(91)90551-9. PMID 1675158. S2CID 41241924.
  • Yanofsky MF, Ma H, Bowman JL, Drews GN, Feldmann KA, Meyerowitz EM (July 1990). "The protein encoded by the Arabidopsis homeotic gene agamous resembles transcription factors". Nature. 346 (6279): 35–9. Bibcode:1990Natur.346...35Y. doi:10.1038/346035a0. PMID 1973265. S2CID 4323431.

References

  1. ^ Weigel, Detlef; Elliot, Meyerowitz (1994). "The ABCs of Floral Homeotic Genes" (PDF). Cell Press. 78: 203–208 – via Oxford Academic.
  2. ^ Coen, Enrico S.; Meyerowitz, Elliot M. (1991). "The war of the whorls: genetic interactions controlling flower development". Nature. 353 (6339): 31–37. doi:10.1038/353031a0. ISSN 1476-4687.
  3. ^ 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.
  4. ^ 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" (PDF). Nature. 346: 35–38.
  5. ^ 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". Development. 132 (3): 429–438. doi:10.1242/dev.01600. ISSN 0950-1991. PMID 15634696.
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