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. 2001 Jun;126(2):875–882. doi: 10.1104/pp.126.2.875

Figure 3.

Figure 3

Comparison of the effect of different phosphate availabilities on the relationship between RSA and shoot dry weight. Log:log plots are presented for total root length against shoot dry weight (a), primary root length against shoot dry weight (b), internode length against shoot dry weight (c), and lateral root length against shoot dry weight (d). Analysis of covariance shows that log shoot dry weight varies significantly with each RSA parameter (degrees of freedom 1, 86; P < 0.001). Phosphate availability has no significant effect on the relationship between shoot dry weight and total root length (a: F1,86 = 3.25 and P > 0.075), but a highly significant effect on the relationship between shoot dry weight and all the other RSA parameters (b: F1,86 = 266 and P < 0.001; c: F1,86 = 72.0 and P < 0.001; and d: F1,86 = 43.5.0 and P < 0.001).