2016
DOI: 10.1590/0102-33062015abb0187
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To resist or to germinate? The effect of fire on legume seeds in Brazilian subtropical grasslands

Abstract: Fire plays an important role in several grassland ecosystems in the world. Fire can trigger germination in several species, by breaking the physical dormancy of their seeds. Thus, we hypothesized that exposure to high temperatures during fire would break seed dormancy and enhance germination. We tested the effect of high temperatures on the germination of six species of legumes from Brazilian subtropical grasslands. We used heat shock experiments with the following treatments: 60, 90, 120 and 150ºC for one min… Show more

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Cited by 26 publications
(16 citation statements)
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References 39 publications
(48 reference statements)
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“…A lack of fire-stimulated germination has also been shown for fire-prone Brazilian subtropical grasslands, the Argentinean Chaco and the Chilean matorral (Overbeck et al, 2006;Jaureguiberry and Díaz, 2015;Fidelis et al, 2016;Gómez-González et al, 2017). Irrespective of germination, seed traits were important predictors of seed mortality under the hottest treatment.…”
Section: Discussionmentioning
confidence: 87%
“…A lack of fire-stimulated germination has also been shown for fire-prone Brazilian subtropical grasslands, the Argentinean Chaco and the Chilean matorral (Overbeck et al, 2006;Jaureguiberry and Díaz, 2015;Fidelis et al, 2016;Gómez-González et al, 2017). Irrespective of germination, seed traits were important predictors of seed mortality under the hottest treatment.…”
Section: Discussionmentioning
confidence: 87%
“…() and Van Klinken & Goulier () for four tropical legume species in Australia, and by Fidelis et al . () for some tropical legume species in Brazil, where dry heat (even at 150 °C) did not break PY. Erickson et al .…”
Section: Discussionmentioning
confidence: 94%
“…Reproduction from seed clearly plays a role in old-growth grassland plant population dynamics (Keeley & Fotheringham, 2000;Medina & Fernandes, 2007), but few old-growth tropical grassland plant populations rely on persistent seed banks for post-fire regeneration (Duvigneaud & Denaeyer-De Smet, 1963;Overbeck et al, 2005;Kolbek & Alves, 2008;Lamont & Downes, 2011;Fidelis et al, 2012). Instead, many species flower profusely (Conceição et al, 2013;Fidelis & Blanco, 2014) after resprouting from bud banks, and then produce seeds, most of which never establish (Overbeck et al, 2006;Dayamba et al, 2008Dayamba et al, , 2010Neves & Conceição, 2010;Fichino et al, 2012Fichino et al, , 2016Le Stradic et al, 2015;Delhaye et al, 2016;Fidelis, Daibes & Martins, 2016).…”
Section: Resilience (1) Endogenous Disturbances and Plant Resproumentioning
confidence: 99%