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Trends Plant Sci. 2006 Jun;11(6):274-80. Epub 2006 May 11.

Trichomes: different regulatory networks lead to convergent structures.

Author information

  • 1Environmental Sciences Faculty, University of Castilla-La Mancha, 45071 Toledo, Spain. laura.serna@uclm.es

Abstract

Sometimes, proteins, biological structures or even organisms have similar functions and appearances but have evolved through widely divergent pathways. There is experimental evidence to suggest that different developmental pathways have converged to produce similar outgrowths of the aerial plant epidermis, referred to as trichomes. The emerging picture suggests that trichomes in Arabidopsis thaliana and, perhaps, in cotton develop through a transcriptional regulatory network that differs from those regulating trichome formation in Antirrhinum and Solanaceous species. Several lines of evidence suggest that the duplication of a gene controlling anthocyanin production and subsequent divergence might be the major force driving trichome formation in Arabidopsis, whereas the multicellular trichomes of Antirrhinum and Solanaceous species appear to have a different regulatory origin.

PMID:
16697247
DOI:
10.1016/j.tplants.2006.04.008
[PubMed - indexed for MEDLINE]
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