Fig. 4.

Variation in average rhizosheath weight (g) of contrasting root hair genotypes grown in the field in sandy loam and clay loam soils for two subsequent years: 2017 (A, B) and 2018 (C–F). Two sampling campaigns were done in 2017 at 24 and 56 d from sowing; four sampling campaigns were done in 2018 at 19, 33, 49 and 61 d from sowing. Data are the mean of four (2017) and eight replicates (2018), with error bars representing the s.e. Differences between genotypes and soil textures were established using two-way ANOVA, P-values are reported and significant (P ≤ 0.05) parameters are in bold, with ‘G’ representing genotype, ‘S’ representing soil texture and ‘G × S’ representing the interaction of genotype and soil texture. Identical letters indicate no significant differences as tested using one-way ANOVA followed by a post-hoc Tukey’s test. NRH represents the no root hair genotype; BRH, the bud root hair genotype; SRH, the short root hair genotype; and WT, the wild type, all in the ‘Optic’ background, together with ‘Sassy’.