HOTHEAD (gene)

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HOTHEAD is an Arabidopsis thaliana gene that encodes a flavin adenine dinucleotide-containing oxidoreductase. This gene has a role in the creation of the carpel during the formation of flowers through the fusion of epidermal cells. [1] Observations of reversion of the hothead phenotype and genotype led to the suggestion that the plants were able to "remember" the sequences of genes present in their ancestors, possibly through a cache of complementary RNA. [2] This report attracted broad attention, [3] and alternative explanations were suggested. [4] [5] [6] Later research suggested that the supposed reversion phenomenon was due to the plants having a pronounced bias towards outcrossing (because of their floral defects), rather than self-fertilizing at high rates, as is typical for A. thaliana. [7] [8] [9] [10]

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References

  1. ↑ Krolikowski KA, Victor JL, Wagler TN, Lolle SJ, Pruitt RE (August 2003). "Isolation and characterization of the Arabidopsis organ fusion gene HOTHEAD". Plant J. 35 (4): 501–11. doi: 10.1046/j.1365-313x.2003.01824.x . PMID   12904212.
  2. ↑ Lolle SJ, Victor JL, Young JM, Pruitt RE (March 2005). "Genome-wide non-mendelian inheritance of extra-genomic information in Arabidopsis". Nature. 434 (7032): 505–9. Bibcode:2005Natur.434..505L. doi:10.1038/nature03380. PMID   15785770. S2CID   1352368.
  3. ↑ Wade, Nicholas (2005-03-23). "Startling scientists, plant fixes its flawed gene". The New York Times. ISSN   0362-4331 . Retrieved 2016-10-24.
  4. ↑ Chaudhury, A. (2005). "Hothead healer and extragenomic information". Nature. 437 (7055): E1–E2. Bibcode:2005Natur.437E...1C. doi: 10.1038/nature04062 . PMID   16136082.
  5. ↑ Comai L, Cartwright RA (2005). "A toxic mutator and selection alternative to the non-Mendelian RNA cache hypothesis for hothead reversion". Plant Cell. 17 (11): 2856–8. doi:10.1105/tpc.105.036293. PMC   1276014 . PMID   16267378. summary Archived 2013-06-21 at the Wayback Machine
  6. ↑ Krishnaswamy L and Peterson T (2006). "An Alternate Hypothesis to explain the high frequency of "revertants" in Hothead mutants in Arabidopsis". Plant Biology. 9 (1): 30–1. doi:10.1055/s-2006-924563. PMID   17048144.
  7. ↑ Peng P, Chan SW, Shah GA, Jacobsen SE (September 2006). "Plant genetics: increased outcrossing in hothead mutants". Nature. 443 (7110): E8, discussion E8–9. Bibcode:2006Natur.443E...8P. doi: 10.1038/nature05251 . PMID   17006468.
  8. ↑ Lolle S. J.; et al. (2006). "Increased outcrossing in hothead mutants (Reply)". Nature. 443 (7110): E8–E9. Bibcode:2006Natur.443E...8L. doi:10.1038/nature05252. S2CID   4425565.
  9. ↑ Pennisi E (2006). "Genetics. Pollen contamination may explain controversial inheritance". Science. 313 (5795): 1864. doi:10.1126/science.313.5795.1864. PMID   17008492. S2CID   82215542.
  10. ↑ Mercier R, Jolivet S, Vignard J, et al. (December 2008). "Outcrossing as an explanation of the apparent unconventional genetic behavior of Arabidopsis thaliana hth mutants". Genetics. 180 (4): 2295–7. doi:10.1534/genetics.108.095208. PMC   2600959 . PMID   18845842.
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