Physically extracting P-value from TukeyHSD test output

Hey,
I have this TukeyHSD output from which I would like to extract only the
P-values (p adj, last number).
The problem is that the test output is a character list.
How can I "break" this sentence to separate the Pv?

    Tukey multiple comparisons of means
     95% family-wise confidence level

Fit: aov(formula = Fe1$Fe ~ Fe1$genotype)

$`Fe1$genotype`
           diff        lwr       upr     p adj
A1/D1-A1 -1.48 -12.660238  9.700238 0.9808395
D1-A1     2.72  -8.460238 13.900238 0.8970997
WT-A1    16.23   5.049762 27.410238 0.0037499
D1-A1/D1  4.20  -6.980238 15.380238 0.7092182
WT-A1/D1 17.71   6.529762 28.890238 0.0017396
WT-D1    13.51   2.329762 24.690238 0.0154169

Thanks