Table 2. Measurement of the extent of Glomus fasciculatum colonization in roots of Solanum lycopersicum cv 76R (wt) and its colonization deficient mutant (rmc). The colonization parameters were calculated using Mycocalc software and represent mean % values of 30 root fragments per plant for 3 plants per treatment, along with standard deviations.

Colonization parameter	Mean values %
	76R	rmc
Frequency of mycorrhiza in root system	91 ± 3.2	62 ± 6.2*
Intensity of mycorrhizal colonization in root system	44 ± 3.1	19 ± 4.2*
Intensity of mycorrhizal colonization in root fragment	52 ± 0.7	25 ± 2.9*
Arbuscule abundance in mycorrhizal part of root fragment	37 ± 2.6	23 ± 2.4*
Arbuscule abundance in root system	16 ± 2.9	2 ± 0.6*

^* Means differ significantly between 76R and rmc (p < 0.05).