FIGURE 1.

Nitric oxide (NO) and ethylene production in tomato cultivar Ailsa Craig challenged with Botrytis cinerea. (A) NO and (B) ethylene were measured, following spraying whole 4 weeks old tomato Ailsa Craig plants with (◆) conidial suspensions of B. cinerea in potato dextrose broth (PDB) or (□) PDB alone, using, respectively, on-line quantum cascade laser (QCL) detection or photoacoustic laser detection. The presented data are the result of measurements of two B. cinerea challenged tomato plants and two PDB challenged tomato plants for each gas. The error bars therefore represent the range of results around a mean (n = 2).