Figure 1 Standard curve for the indirect competitive ELISA made with purified antigens of B. cinerea covering a range of antigen concentration between 0 and 100 μg mL -1 . Each value is based on five determinations. The error values represent the standard deviation. Sapanisertib manufacturer The coefficient of variation (CV) for

the determination of 25 μg mL-1 B. cinerea was below 4% (six replicates). The www.selleckchem.com/products/PD-173074.html precision of the ELISA assay was checked with control solutions of 5, 25 and 75 μg mL-1 B. cinerea purified antigens concentrations. The within-assay precision was tested with 5 measurements in the same run for each sample. These series of analyses were repeated for three consecutive days in order to estimate the between-assay precision. The results obtained are presented in Table 1. The B. cinerea immunoassay showed good precision; the CV within-assay values were below 4% and the between-assay values were below 7%. Table Alvocidib 1 Within-assay precision (five measurements in the same run for each control) and between-assay precision (five measurements for each control, repeated for three consecutive days). a Control solution Within-assay Between-assay   Mean CV % Mean CV % 5 μg mL-1 5.27 3.51 5.87 4.56 25 μg mL-1 24.56 2.87 25.30 5.80 75 μg mL-1 75.92 3.15 74.17 6.58 a μg mL-1 B. cinerea antigen The correlations between

the lesion diameters of the fruit samples and the amount of B. cinerea antigen detected by the proposed method from infected fruit extracts samples obtained at 4, 7, and 10 d of incubation (25°C), respectively, are presented in Table 2. These results showed a correlation between the damage level and the amount of fungus present in the fruit samples. B. cinerea was detected even when the fruit rot was not visible yet but perhaps it had begun to germinate (about 4 days after inoculation

and incubation of the fruit samples). Tests in which the fruit samples were infected using different conidia suspensions of B. cinerea were also made: 1 × 104, 1 × 105, and 1 × 106 conidia mL-1, respectively. Absorbance measured after 4 d of incubation (25°C) did not show significant differences (data not shown), because pheromone the method only detect germ tubes in the precise moment they appear, and the quantity of germinated conidia does not always depend of the quantity of inoculated conidia. Table 2 Correlation between the lesion diameters of the fruit samples, the amount of B. cinerea antigen determinated by the ELISA developed and the DNA of B. cinerea quantified from infected fruit extracts samples obtained at 4, 7, and 10 days of incubation (25°C), respectively. Fruit samples Days of incubation bLesion diameters (mm/rot) c B. cinerea antigen (μg mL-1) c DNA- B. cinerea (μg mL-1) Apples (Red-delicious) a Control uninfected not detected not detected   4 not visible 10.53 ± 0.48 10.22 ± 0.53   7 20.11 ± 0.54 40.67 ± 0.37 38.75 ± 0.41   10 50.09 ± 4.49 69.08 ± 0.43 71.19 ± 0.