1. Introduction
Multi-spectrum analysis (infra-red and visible, ultraviolet light)of reflected or re-emitted light from the plant crown, stem andleaves provides information on the nutritional, hydrological andphysio-pathological state of plants, as well as on the plant’s abil-ity to intercept light. The relative simplicity and high efficiencyof such imaging technology and the subsequent data processingenables it to be successfully integrated in experiments that involvemany variables, a high number of sampling intervals, and multi-ple comparisons. Given that it can extract phenotypic data quicklyand efficiently, multi-spectrum analysis has become an inter-face between molecular genetics and plant phenotyping. In fact,