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. 2022 Jan 25;13:477. doi: 10.1038/s41467-022-27976-8

Fig. 1. Effect of PHR2 mutation and overexpression on root colonization by AM fungi.

Fig. 1

Percent root length colonization (RLC) total (A), arbuscules (B), and vesicles (C) of the indicated genotypes inoculated with R. irregularis (AMF) for 7 weeks at low phosphate (25 µM Pi, LP) or high phosphate (500 µM Pi, HP). D Percent RLC of the indicated genotypes inoculated with AMF for 7 weeks at LP. Arb.: Arbuscules; Ves.: Vesicles. Confocal images of AMF in roots of wild type (E) and phr2 (F). Arbuscule phenotype in wild type (G) and phr2 (H) roots. E, extraradical hypha; H, hyphopodium; I, intraradical hypha; A, arbuscule. Scale-bars: E, F: 100 μm and G, H: 10 μm. Statistics: Individual data points and mean ± SE are shown. A–C N = 5 independent plants; Brown-Forsythe and Welch’s One-Way ANOVA test with Games–Howell’s multiple comparisons test. Different letters indicate statistical differences. D N = 5 independent plants; Mann–Whitney test (two-tailed) between phr2(C) and wild type for Total (p = 0.0079), arbuscules (p = 0.0079) and vesicles (p = 0.0079). Asterisks indicate significance of difference: ** p ≤ 0.01. E–H The phenotype was observed in 11 (6 + 5) independent plants in two independent experiments.