Reproduction possibilities of Schinus johnstonii (Anacardiaceae), a native species to the Argentine Monte
Schinus johnstonii F. A. Barkley (Anacardiaceae) is a shrub native to the Monte Phytogeographic Province, where it represents an important component of rangelands. Its tolerance to drought and abundant flowering, render it a good option for landscaping and restoration of degraded and deforested environments projects. For such purposes, information about its reproduction possibilities is needed. The objectives of this work were to determine the basic requirements for germination of its seeds (sexual reproduction), under laboratory conditions, and to analyze the survival of cuttings (vegetative reproduction), under controlled conditions and different treatments. The collected seeds were subjected to six pre-germination treatments: intact exocarp (control), exocarp remotion (bare), bare seeds with mechanical scarification, bare seeds with chemical scarification, bare seeds with soaking and bare seeds with exposure to smoke. Germination was only observed in seeds without exocarp. Bare seeds germinated after 10 days, with a maximum value of 38%, with no differences between treatments. In addition, a significant proportion of non-viable or empty seeds (30-40%) was observed. The vegetative reproduction study, with cuttings collected during the vegetative and reproductive phenological stages, with and without rooting hormone, resulted in a low percentage of regrowth (20%), with no differences between treatments. According to these results, seeds of S. johnstonii would present physical dormancy imposed by the cover (overcome by removal of the exocarp). The reproduction of this shrub by means of cuttings is not recommended, although further studies are suggested.
| Autores principales: | , , , |
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| Formato: | Digital revista |
| Idioma: | spa |
| Publicado: |
Fundación Miguel Lillo
2020
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| Acceso en línea: | http://www.lillo.org.ar/journals/index.php/lilloa/article/view/666 |
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