Table 1. Infection frequency in explants of A. mexicana. Histochemical GUS assays were performed on explants twelve days after inoculation with strain LBA4404::pCAMBIA2301.

Tissue

Infected explants

GUS positive explants

Frequency of infection¹

GUS foci per explant^2,3

 Shoot apex

150

10

6.7

7.5 (3)^a

 Leaf primordia

150

9

6.0

17.0 (6)^b

 Leaves

150

6

4.0

19.3 (5)^b

 Roots

150

5

3.3

2.0 (1)^a

¹Infection frequency was calculated as the percentage of GUS-positive explants per total number of explants examined.
²Number of GUS foci per explant was the average of GUS positive foci in at least three independent explants with standard deviation in brackets.
³Values with different letters are statistically different (P = 0.05), according to Tukey's test.