Abstract

RUETER, Bárbara L.  and  RODRIGUEZ, Fernando J.. Vegetative propagation in a species of interest in restoration: effect of the previous disturbance, the collection season and a hormonal regulator in Senecio filaginoides DC. Multequina [online]. 2021, vol.30, n.2, pp.115-127. ISSN 1852-7329.

In arid and semiarid areas of the Patagonian region, Senecio filaginoides DC has shown aptitude to be used as framework species for the ecological restoration of degraded sites. The objective of this work was to establish a method of sprout propagation that considers the combined effect of the previous disturbance in the cuttings collection site, the season of the year in which the collection was carried out and the application of a hormonal regulator. Twenty populations were sampled; ten at sites with prior disturbance and ten at undisturbed sites. After collecting the cuttings, they were immersed in the hormonal regulator for 48 hours and remained under controlled conditions for 30 days. The percentage of rooted cuttings, the number of roots per cutting and their length were evaluated. The concentration of the hormonal regulator, the previous disturbance and the season of the year had an effect on the rooting success. The root formation was more successful at low concentrations of the regulator. The cuttings collected from disturbed sites, such as roads, presented higher rooting followed by those at oil locations. Cuttings collected in autumn-winter had longer roots. Vegetative propagation will allow the multiplication of S. filaginoides, reducing costs and efforts in the production of plants for ecological restoration.

Keywords : Acetic acid naphthalene; Ecological restoration; Root formation; Senecio filaginoides.

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