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

被引:70
作者
Grierson, CS
Roberts, K
Feldmann, KA
Dolan, L
机构
[1] JOHN INNES CTR PLANT SCI RES, DEPT CELL BIOL, NORWICH NR4 7UH, NORFOLK, ENGLAND
[2] UNIV ARIZONA, DEPT PLANT SCI, TUCSON, AZ 85721 USA
关键词
D O I
10.1104/pp.115.3.981
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
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(-) roof 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.
引用
收藏
页码:981 / 990
页数:10
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