Spectral signatures of non-inoculated (healthy) barley leaves cv. Ingrid WT (a), Mla12
(e) and barley leaves inoculated with Blumeria graminis f.sp. hordei (Bgh) (b, d, f), from 3 to 14 dai. Reflectance spectra of healthy leaves of the near-isogenic lines are similar. During the measuring period, the reflectance of healthy leaves increased in the visible range. Reflectance of inoculated, susceptible genotypes (WT and Mla12) increased in the VIS and WT had decreased reflectance in the NIR. The inoculated, resistant mlo3-genotype showed significant differences to healthy leaves in the reflection from 530 – 680 nm only 14 dai. (n = 3).