Abstract

RAMOS-PALACIOS, Renato; OROZCO-SEGOVIA, Alma; SANCHEZ-CORONADO, María Esther  and  BARRADAS, Víctor L.. Vegetative propagation of native species potentially useful in the restoration of México City's vegetation. Rev. Mex. Biodiv. [online]. 2012, vol.83, n.3, pp.809-816. ISSN 2007-8706.  https://doi.org/10.7550/rmb.21610.

Hardwood and softwood cuttings of Buddleja cordata HBK, Dodonaea viscosa Jacq and Senecio praecox D.C. were tested to know their ability to form adventitious roots. Cuttings were prepared in 2 different seasons (wet and dry) and treated with different microclimatic conditions and auxin concentrations (IBA and NAA). Hardwood and softwood cuttings of B. cordata rooted during the dry and wet season, whilst hardwood and softwood cuttings of D. viscosa rooted only in the wet season, cuttings of S. praecox rooted only in wet season with a higher rooting for hardwood than softwood cuttings. Low hormone concentrations (10 - 100 ppm) favored the rooting percentage more than high concentrations (1000 - 10 000 ppm). However, high hormone concentrations favored number, length of roots and number of developed shoots. Natural regeneration of these species is limited and the species are difficult to propagate from seeds. Vegetative propagation of these species could be an alternative to get clonal planting stock for reforestation programs in some Mexico City areas.

Keywords : auxins; Buddleja cordata; Dodonaea viscosa; Senecio praecox; rooting cuttings.