. 2015 Apr 3;27(4):1352–1366. doi: 10.1105/tpc.114.131144

Table 1. Colonization of amt2;3 during Growth with Differing Levels of N Fertilization.

N Treatment	Genotype	No. of IUs (3 wpi)	No. of IUs (4 wpi)	No. of Arbuscules per Unit Area (3 wpi)	No. of Arbuscules per Unit Area (4 wpi)
15 mM	R108	20.33 ± 2.33^a	68.00 ± 9.54^a	5.22 ± 0.46^a	4.39 ± 0.48^a
15 mM	amt2;3	22.33 ± 3.93^a	27.00 ± 3.51^a	4.16 ± 0.46^a	3.85 ± 0.46^a
7.5 mM	R108	14.00 ± 2.65^a’	37.67 ± 9.24^a’	5.10 ± 0.54^a’	4.67 ± 0.48^a’
7.5 mM	amt2;3	20.00 ± 2.65^a’	31.00 ± 2.00^a’	4.92 ± 0.62^a’	4.84 ± 0.58^a’
1.5 mM	R108	25.00 ± 3.06^a’’	30.67 ± 5.84^a’’	6.87 ± 0.64^a’’	3.93 ± 0.49^a’’
1.5 mM	amt2;3	28.33 ± 2.33^a’’	31.67 ± 3.28^a’’	3.73 ± 0.60^b’’	3.52 ± 0.37^a’’

Infection unit number in R108 (wild type) and amt2;3 at 3 and 4 wpi with G. versiforme during fertilization with 15 mM N (FS1), 7.5 mM N (FS2), or 1.5 mM N (FS3) fertilizers. Data represent the mean ± se of three independent replicates. Different letters indicate significant differences between genotypes for a given treatment or parameter (α = 0.01).