The rooting of poplar cuttings: a review

Poplar (Populus spp.) is one of the most important economical tree species in temperate regions of the world. Easy propagation by cutting has made most of the selected genotypes of poplar available for intensive plantation with large genetic gains. Critical point for successful propagation of cutting is the development of roots. Thus, rooting context of the cutting appeared to be a pivotal scenario in poplar vegetative propagations. In this overview, we focus on the progress in defining the genetic, physical, chemical and environmental factors that influences the poplar cuttings to develop adventitious roots. These factors include genotype effect, physiological conditions of the stock plants, plant growth regulators, temperature, rooting substrates/media as major variables for the development of rooting events.