ALLELOPATHY AND FIRE CYCLE IN BRAZILIAN CERRADO

Allelopathy refers to the effect of biochemical interactions from one plant another including inhibitory and stimulatory effects. The products, allelochemicals are highly toxic, production these compounds not only can be stimulated by plants microorganism, but also environment factors e.g. water stress, nutrient deficiency temperature where conditions commonly found in cerrado enviroment. Cerrado region is rich which produce secondary metabolite, especially phenolic numerous vegetations have been investigated their effects on other crops developments. It known that allelopathy a key process regulating regeneration many world ecosystems savanna/cerrado. interest allelopathic study shrub rises as result inadequate natural reduced growth planted seedlings has attributed release herbaceous vegetation. Fires, whether they or human made, common characteristic this biome its presence considered an important ecological factor responsible for species diversity. Following fire, negative removed reduced. However, associated with seedling survival, caused toxin, low soil fertility, water, temperatures animal predation. This paper reviews vegetation launched toxic plants, savanna fire post-fire impacts. In general, main objective point out fire-related impacts provide us solve issues concerning sustainable development cerrado.