Adventitious Rooting in Populus Species: Update and Perspectives

Abstract

Populus spp. are among the most economically important species worldwide. These trees are used not only for wood and fiber production, but also in the rehabilitation of degraded lands. Since they are clonally propagated, the ability of stem cuttings to form adventitious roots is a critical point for plant establishment and survival in the field, and consequently for the forest industry. Adventitious rooting in different Populus clones has been an agronomic trait targeted in breeding programs for many years, and many factors have been identified that affect this quantitative trait. A huge variation in the rooting capacity has been observed among the species in the Populus genus, and the responses to some of the factors affecting this trait have been shown to be genotype-dependent. This review analyses similarities and differences between results obtained from studies examining the role of internal and external factors affecting rooting of Populus species cuttings. Since rooting is the most important requirement for stand establishment in clonally propagated species, understanding the physiological and genetic mechanisms that promote this trait is essential for successful commercial deployment.

Seaweed Extracts as Substitutes of Synthetic Hormones for Rooting Promotion in Rose Cuttings

“…BRs have already shown their role in rooting promotion of ornamental plant cuttings [10], but commercial synthetic products are still based principally on auxins and, to our knowledge, they have never been tested on rose cuttings. BRs have shown contrasting effects on rooting in woody cuttings of different plant genotypes [23,24]. In addition, in our experimental conditions, 22(S),23(S)-homobrassinolide showed opposite effects on the two rose cultivars.…”

Biological Contribution of Ornamental Plants for Improving Slope Stability along Urban and Suburban Areas

“…The development of adventitious roots is stimulated by the increase of ethylene production in the shoots of the trees or for effect of external increasing of the compound in the soil solution [103]. Formation of adventitious roots in response to ethylene has been considered a major adaptive mechanism of wetland plants to root damage caused by waterlogging stress [104].…”

Molecular basis of differential adventitious rooting competence in poplar genotypes

“…The genus Populus comprises about 30 species; its wood forms an abundant and renewable source of biomaterials and bioenergy ( Ragauskas et al , 2006 ). The propagation of poplar species depends primarily on adventitious root (AR) formation from detached stem cuttings ( Dickmann, 2006 ), but one major constraint for vegetative propagation of some economically important elite genotypes is incompetence or rapid loss of capacity in forming AR ( Bellini et al , 2014 ; Brunoni et al , 2019 ; Bannoud and Bellini, 2021 ). AR development is a complex, heritable trait controlled by many endogenous regulatory factors, and quite influenced by environmental factors ( Bellini et al , 2014 ; Bannoud and Bellini, 2021 ).…”

“…The propagation of poplar species depends primarily on adventitious root (AR) formation from detached stem cuttings ( Dickmann, 2006 ), but one major constraint for vegetative propagation of some economically important elite genotypes is incompetence or rapid loss of capacity in forming AR ( Bellini et al , 2014 ; Brunoni et al , 2019 ; Bannoud and Bellini, 2021 ). AR development is a complex, heritable trait controlled by many endogenous regulatory factors, and quite influenced by environmental factors ( Bellini et al , 2014 ; Bannoud and Bellini, 2021 ). The rooting capacity of cuttings varies among individuals within species, populations, or even clones ( Abarca and Díaz-Sala, 2009a , 2009b ).…”