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The present work describes the fire effects on the population structure of Casearia sylvestris Swartz (Salicaceae). Diameter and height structure as well as spatial distribution patterns of the root sprouts were analyzed pre- and post-fire. The morphology and anatomy of the underground system were also analyzed in order to investigate the nature and origin of sprouts from this system. In this study, a 10-ha of Cerrado area was sampled from February to November 2006; in August, a fire burned roughly 80% of the study area, allowing us to compare the data collected pre- and post-fire. Our findings show that the underground systems consisted of specialized roots and buds originated close to the vascular cambium. The spatial distribution of the root sprouts became clustered pre- and post-fire and most of the root sprouts were concentrated in the first size class, indicating that the sprouts from roots play an important role in the recovery of this species in burnt areas.

The role of root buds in the regeneration of Casearia sylvestris Swartz (Salicaceae) in the cerrado, São Carlos, São Paulo state, Brazil