Rebrote post-fuego en especies del bosque seco tropical y su relación con la anatomía del parénquima

Abstract

Forest fires cause significant impacts on bs-T, considerably altering vegetation cover. Over time, plants have developed adaptations to survive these disturbances, in which the ability to resprouting has been reported in some species of these ecosystems. This mechanism is linked to the presence of non-structural carbohydrates in parenchyma cells. This study focused on characterizing the regrowth capacity, analyzing the percentage and type of parenchyma, and evaluating the relationship between post-fire resprouting and parenchyma characteristics in species of a tropical dry forest located in Honda, Tolima. Plots were established to record tree individuals with a DBH equal to or greater than 10 centimeters, where basal and apical regrowth was evaluated. Additionally, with the support of the Alexander von Humboldt Research Institute, anatomical sections of the species under study were analyzed, measuring the proportion of axial and radial parenchyma using a mesh of points. Additionally, species that had not previously been recorded in the literature as resprouters were included for comparative purposes. Five species with regrowth capacity and four without this capacity were identified. It was found that the species Machaerium capote and Handroanthus chrysanthus stood out with a "very high" apical regrowth and with the highest values of axial parenchyma, being these species resprouters. Finally, these results show that there is a clear relationship between the presence of axial parenchyma and post-fire regrowth capacity, associated with both basal and apical regrowth in some species.