Fire-related germination and early seedling growth in 21 herbaceous species in Central Anatolian steppe

Tavşanoğlu, Çağatay; Çatav, Şükrü Serter; Özüdoğru, Barış

doi:10.1016/j.jaridenv.2015.06.017

Cited by 16 publications

(8 citation statements)

References 45 publications

(71 reference statements)

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“…Consequently, a strong selection pressure might be present for seed traits in annual species in comparison with the species with perennial life cycles (Keeley et al , 1985; Venable and Brown, 1993). In fire-prone ecosystems, local fire regime is a candidate for being one of the strongest pressures on seed traits (Thomas et al , 2003; Moreira et al , 2012; Tavşanoğlu et al , 2015; Fichino et al , 2016). Therefore, annual species specific to post-fire habitats should be adapted to germination after a fire, as shown in the Mediterranean-type ecosystems of California, South Africa, and Western Australia (Keeley et al , 1985; Keeley and Bond, 1997; Keeley and Fotheringham, 1998b; Downes et al , 2010).…”

Section: Discussionmentioning

confidence: 99%

“…For perennial species, having a fire-resistant seed bank and loss of resprouting ability are the key events in their evolutionary history of fire dependency (Pausas and Keeley, 2014). For annual species, the co-existence of three abilities is crucial for the population to survive a fire: the presence of a permanent seed bank in the soil (Traba et al , 2004), the resistance of seeds to the temperatures in the seed bank caused by fire (Tavşanoğlu et al , 2015), and post-fire stimulation of germination (Keeley and Bond, 1997; Keeley and Fotheringham, 1998b).…”

Section: Introductionmentioning

confidence: 99%

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Multiple fire-related cues stimulate germination inChaenorhinum rubrifolium(Plantaginaceae), a rare annual in the Mediterranean Basin

et al. 2017

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In Mediterranean fire-prone ecosystems, annual species specific to post-fire habitats should have a soil seed bank and should be able to germinate after a fire. Therefore, various fire-related cues can be expected to stimulate germination in post-fire annuals. Germination patterns of the rare annual Chaenorhinum rubrifolium (Plantaginaceae) were examined in response to mechanical scarification, heat shock, aqueous smoke, nitrogenous compounds, gibberellic acid, karrikinolide (KAR1), and mandelonitrile (a cyanohydrin analogue, MAN) under dark and photoperiod conditions in the laboratory. Combinations of these treatments were also included in the experiment. Strong physiological dormancy in the seeds of C. rubrifolium was partially broken by several fire-related germination cues, including smoke and nitrate, under light conditions. KAR1 and MAN also stimulated germination, and the highest improvement in germination was achieved in the KAR1 treatment in the presence of light. Heat shock + smoke and KAR1 + MAN combinations had positive synergetic and additive effects on germination under light conditions, respectively. The light played a crucial role in the promotion of germination. The results suggest that multiple fire-related cues operate to stimulate germination in C. rubrifolium, an annual species from the Mediterranean Basin. However, the species may have a broader germination niche than a fire-restricted one.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple fire-related cues stimulate germination inChaenorhinum rubrifolium(Plantaginaceae), a rare annual in the Mediterranean Basin

et al. 2017

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“…Heat and smoke are the most commonly used fire signals in seed germination trials (e.g. Dayamba et al, 2008;Reyes and Trabaud, 2009;Moreira et al, 2010;Fichino et al, 2016;Kin et al, 2016;Ramos et al, 2016Ramos et al, , 2019Tavşanoğlu et al, 2017;Arcamone and Jaureguiberry, 2018). In fire-prone ecosystems, such as Mediterranean-type shrublands, these signals stimulate the germination of many species and largely explain the recruitment of new individuals from seeds (Brown, 1993;Dixon et al, 1995;Keeley and Fotheringham, 1998;Paula and Pausas, 2008;Moreira et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Field burn versus fire-related cues: germination from the soil seed bank of a South American temperate grassland

2020

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Fire and grazing are large-scale disturbances that shape the structure and function of open habitats. In temperate grasslands of southern South America, fire is used as a management tool to control tussock grasses and improve forage quality. In this study, we examined if fire and two of its components (heat and smoke) affect germination from the soil seed bank of a temperate grassland in Uruguay. Soil samples were extracted from a recently burned site and from an adjacent area that had not been burned for at least 4 years. The latter was subjected to four treatments: (1) heat shock, (2) smoke, (3) heat shock and smoke and (4) control. The samples were placed in a germination chamber and germination was recorded for 140 days. Field burn was the treatment that differed most from the control. This treatment produced a significant increase in density and richness of germinants and the germination peak preceded those of the remaining treatments. The three treatments involving fire-related cues did not affect the seedling richness and density, but the germination of some individual species was enhanced by some of them, mainly those in which the seeds were smoked. Our results show that fire and its components stimulate the germination of some species of the Río de la Plata grasslands, contrary to what had been observed previously in the region. We also suggest that, unlike Mediterranean-type systems, other fire cues, alone or in combination with heat and smoke, may promote germination after a fire event.

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“…After determining the germination percentage, the seed vigor index (VI) was calculated by the formula VI = (shoot length + root length) × germination percentage (Tavsanoglu et al, 2015).…”

Section: Seed Vigor Indexmentioning

confidence: 99%

Response of some sorghum varieties to GA3 concentrations under different salt compositions

Nimir

Zhou

Zhu

et al. 2020

Chil. j. agric. res.

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Germination is a very sensitive stage for the harmful effect of salinity stress. Plants respond differently to different types of salt. Gibberellic acid (GA3) is the most important hormone to mitigate salt stress. A controlled germination study was conducted to evaluate the impact of different salts (0, 150 mM NaCl, and 150 mM Na2SO4) and different GA3 concentrations (0, 50, 100, 250, and 300 mg L-1) on the germination of the two most used Sudanese sorghum (Sorghum bicolor [L.] Moench) varieties Wadahmed and Tabat. The studied parameters were seed water uptake after 8 h imbibition, germination percentage, germination rate, shoot and root length, shoot and root fresh weight, shoot and root dry weight, and seed vigor index. Results showed that Na2SO4 reduced germination percentage, germination rate, shoot length, root length, root fresh weight, shoot dry weight, root dry weight, and seed vigor index by 17.0%, 50.0%, 86.99%, 89.03%, 76.8%, 54.5%, 66.6%, and 89.7%, respectively, when compared with the non-saline treatment. The maximum values for seed water uptake, germination percentage, germination rate, shoot length, and seed vigor index were achieved at 100 mg L-1 GA3. The Na2SO4 salt had a more harmful effect than NaCl. The 100 mg L-1 GA3 concentration can be recommended to improve seed water uptake, germination parameters, and seedling growth under salt stress in the two Sudanese sorghum varieties (Wadahmed and Tabat). 'Wadahmed' was more tolerant to salinity stress than 'Tabat' at the germination stage.

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Fire-related germination and early seedling growth in 21 herbaceous species in Central Anatolian steppe

Cited by 16 publications

References 45 publications

Multiple fire-related cues stimulate germination inChaenorhinum rubrifolium(Plantaginaceae), a rare annual in the Mediterranean Basin

Multiple fire-related cues stimulate germination inChaenorhinum rubrifolium(Plantaginaceae), a rare annual in the Mediterranean Basin

Field burn versus fire-related cues: germination from the soil seed bank of a South American temperate grassland

Response of some sorghum varieties to GA3 concentrations under different salt compositions

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