Fig. 7

a Senescence rate calculation in barley pot-experiment: photos taken at 66 and 78 days after planting, on a background of a standard (80 × 120 cm) white sheet. b Pre-processing was performed on the entire dataset, to remove background having shades of color very similar to those of the plants. The image area not including the standard white sheet was excluded by replacing it with a non-plant color (pink)