Fig. 2. Quantitative analysis of root hair phenotypes. (A) Mean number of root hairs per mm root. At least 50 measurements were taken for each genotype, visible hairs were counted in a 1mm section of mature root, and only those observed from above were counted. (B) Mean epidermal cell length (mm). One hundred cells, both atrichoblasts and trichoblasts, were measured for each genotype, from at least 10 different plants. (C) Number of root hairs per one cell length. The measurements for number of hairs per mm were multiplied by the corresponding epidermal cell length, to give the mean number of hairs per unit cell length. (D) Mean length of root hairs. Fifty hairs were measured, from at least 10 different plants, for each genotype. Only hairs in mature sections of the root were measured. (E) Mean length of root hairs grown on medium with no phosphate. Fifteen hairs were measured, from at least 3 plants. All measurements were made on 5-day-old plants. Bars represent the standard errors of the means.

Return to article