FIGURE 4.
Analysis of internal spermidine concentrations and lichen-associated Stenotrophomonas sp. isolates. The isolates were cultivated on solid cultivation media followed by cell disruption and quantification of internal spermidine levels (n = 21). A total of six Lobaria-associated isolates were utilized together with one plant-associated isolate (P69) in a comparative approach. Stenotrophomonas sp. 165P3RAB was shown to contain the highest internal spermidine concentration (p < 0.1) compared to all other isolates, while isolate 329P5R had the lowest concentration (p < 0.01).
