ADVENTITIOUS ROOTS DEVELOPMENT AND ROOT SYSTEM ARCHITECTURE OF CHRYSANTHEMUM CUTTINGS

Chrysanthemum have significant ornamental value and thus have a great economic importance and are also subjected to losses due to the insufficient rooting of the cuttings the main method of vegetative propagation practiced for this crop. Insufficient understanding of the mechanisms that control adventitious root formation prevents the use of reliable technologies to improve the percentage of root adventitious development in cuttings of ornamental plants in general. Also, knowing the architecture of the root system helps correct application of chrysanthemum culture technologies. Two different cultivars of Chrysanthemum was investigated in order to describe the radicular architecture of cuttings, with emphasis on the root type and the influence of substrate on the developed model into four different variants of rooting substrate.