The COW1 locus of Arabidopsis acts after RHD2, and in parallel with RHD3 and TIP1, to determine the shape, rate of elongation, and number of root hairs produced from each site of hair formation

Claire S. Grierson, Keith Roberts, Kenneth A. Feldmann, Liam Dolan

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

Two recessive mutant alleles at CAN OF WORMS1 (COW1), a new locus involved in root hair morphogenesis, have been identified in Arabidopsis thaliana L. Heynh. Root hairs on Cow1- mutants are short and wide and occasionally formed as pairs at a single site of hair formation. The COW1 locus maps to chromosome 4. Root hairs on Cow1- plants form in the usual positions, suggesting that the phenotype is not the result of abnormal positional signals. Root hairs on Cow1- roots begin hair formation normally, forming a small bulge, or root hair initiation site, of normal size and shape and in the usual position on the hair-forming cell. However, when Cow1- root hairs start to elongate by tip growth, abnormalities in the shape and elongation rate of the hairs become apparent. Genetic evidence from double-mutant analysis of cow1-1 and other loci involved in root hair development supports our conclusion that COW1 is required during root hair elongation.

Original languageEnglish (US)
Pages (from-to)981-990
Number of pages10
JournalPlant physiology
Volume115
Issue number3
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science

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