FIG. 2.

Quantification of infection thread (IT) types following coinoculation of alfalfa seedlings with Gfp-expressing and DsRed-expressing S. meliloti. (A) Plant roots were examined by epifluorescence 7 to 10 days after inoculation with the indicated number of bacteria, and the number of red, green, and mixed (sectored and jumbled) infection threads per plant was determined. (B) Data for mixed infection threads replotted as the percentage of total infection threads per plant at each inoculation density.