Figure 6.

Inhibition of growth of N. haematococca in root exudates of inoculated seedlings. A, Spores (10⁵/mL) of N. haematococca 34-18 were added to samples of root exudate collected from control or inoculated seedlings, and growth was monitored over the course of 3 d, as described in “Materials and Methods.” The difference in the growth was statistically significant for the growth in the second (P value 0.009) and the third day (P value 0.006) but not for the first day (P value 0.745). B, Growth of N. haematococca 94-2-4 in exudate from seedlings inoculated with strain 34-18 and collected as described in “Materials and Methods.” Values for exudate from control or inoculated seedlings at day 2 and day 3 were statistically distinct at P < 0.05. C, Growth of M. pinoides in exudate from seedlings inoculated with N. haematococca strain 34-18 and collected as described in “Materials and Methods.” Values were not statistically distinct at P < 0.05.