The use of image analysis to assess quality of Cichorium intybus seeds differing in coat colour
Chicory (Cichorium intybus) is a perennial tap-rooted herb cultivated in South Africa for the production of coffee substitute. The chicory seed available in South Africa has been reported to be of low quality. Chicory seeds are different colours and the seed colour has been associated with seed quality; therefore, the possible association between seed quality and seed colour, with respect to seed germination and vigour, was investigated. Chicory seeds ('Orchies') were separated visually into eight seed colour categories. Two general colour categories were used to measure seed performance, light and a dark-coloured seed. Seed quality was determined based using standard germination (SG), accelerated aging (AA), imbibition and electrolyte leakage (EC) tests. There was a significant interaction between seed colour and seed germination percentage and mean germination time. Seed colour and certain seed quality aspects (germination velocity and imbibition time) were also related. Electrolyte leakage from the seeds was significantly different (PKLEINERDAN0.05) between seeds of different colours. Therefore, results indicated that the chicory seed colour and seed performance are aligned. Possibilities to separate chicory seeds by colour in order to plant the better performing seeds warrants further investigation.
Bertling, I., Odindo, A.O. and Manyoni, N.N. (2018). The use of image analysis to assess quality of Cichorium intybus seeds differing in coat colour. Acta Hortic. 1204, 25-32
chicory, seed quality parameters