Files in this Data Supplement:
GenBank accession numbers for reference sequences in Fig. 2; details of sites and samples (Table S1); relative efficiencies of qPCR amplification of isolates compared to reference strain P. syringae Cit7 (Table S2); comparison of qPCR performances for primer pairs 3308f/3463r and 3341fb/3462r1, designed to amplify a broad range of ina gene alleles (Fig. S1); quantitative PCR standard series using primers 3308f/3462r1 with P. syringae Cit7 DNA (a), and qPCR using 3380f with 3463r but under more stringent PCR conditions (b) (Fig. S2); ice-nucleating particle temperature spectra in leaf washings from irrigated crops at SAREC (Fig. S3); ice-nucleating particle temperature spectra in precipitation samples (Fig. S4);
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