Diversity of germination strategies and seed dormancy in herbaceous species of campo rupestre grasslands

摘要: The effects of fire on the vegetation vary across continents. However, in Neotropical fire-prone grasslands, relationship between and seed germination is still poorly understood, while their regeneration, especially after strong anthropogenic disturbance, challenging for conservation. In present study, we assessed diversity strategies 15 dominant herbaceous species from altitudinal grasslands (locally known as campos rupestres). We exposed seeds to several fire-related treatments. also compared regularly post-fire fruiting species. Finally, investigated dormancy classes aiming at better understanding biogeography phylogeny dormancy. Germination varied among families. Velloziaceae Xyridaceae produced non-dormant, fast-germinating seeds. Cyperaceae Poaceae showed an extremely low or null due a high proportion unviable embryo-less campo rupestre are resistant, but there no evidence that triggers this ecosystem. Although heat charred wood did not promote germination, smoke enhanced one grass decreased mean time improved synchrony Velloziaceae. Fire had positive effect regeneration by stimulating fruit set some These faster germinating with higher percentage This strategy dispersion seems be alternative production triggered fire. Physiological reported first clades plants. Our data help advance knowledge role grasslands.