Apoyo a la línea de investigación en especies y propagación : longevidad de las semillas de Weinmannia pubescens y adaptación de plántulas en sustrato

Abstract

One of the most representative species of the high Andean forests is Weinmannia pubescens Kunth. Although its conservation status has not been evaluated, it is a species widely used by local communities, which has decreased its populations and increased its vulnerability. Based on the above, the storage of seeds in germplasm banks is proposed as a conservation strategy, but the greatest limitation that arises is with respect to the longevity of the seeds. In the present study it was proposed to evaluate the longevity in seeds of W. pubescens. For this purpose, two tests were carried out: viability test on seeds with collection moisture content (9.8%) and seeds with reduced moisture content (5%) and germination test, carried out under three T1 treatments: Content moisture (9.85%), T2: moisture content (9.85%) and addition of GA3 at 250 ppm, T3: moisture content (5%) and addition of GA3 at 250 ppm; Likewise, the survival and growth of the individuals obtained from the germination tests was monitored. No significant differences were found in viability in seeds stored at initial moisture content (9.8%) and reduced moisture content (5%), but differences were found between the evaluated periods; Regarding the germination test, no variation was found in the germination percentage between the evaluated periods, but there were differences between the applied treatments. Likewise, there was a mortality of 39% and an average growth of 2.55 mm per week. In conclusion, the seeds of W. pubescens have an orthodox behavior, therefore, they can be conserved in germplasm banks.