Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

Jayasuriya, K.M.G. Gehan; Wijetunga, Asanga S. T. B.; Baskin, Jerry M.; Baskin, Carol C.

doi:10.1017/s0960258513000214

Cited by 79 publications

(86 citation statements)

References 38 publications

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“…As a fi rst step, it is known that seeds of some Mimosa species are able to germinate in a wide range of temperatures (De Souza-Araújo and De Castro-Andrade, 1983;CamargoRicalde et al, 2004;Pavón et al, 2011), and that scarifi cation increases the percentage of germination (Ferreira et al, 1992;Camargo-Ricalde and Grether, 1998;Camargo-Ricalde et al, 2004;González-Castañeda et al, 2004;Silveira and Fernandes, 2006;Leal and Biondi, 2007;Chahuan and Johnson, 2008;Pavón et al, 2011;Gehan-Jayasuriya et al, 2013). However, it is not yet possible to generalize about how seeds will respond to both seed scarifi cation and temperature fl uctuation because only 5 % of the species of Mimosa have been studied around the world.…”

Section: Susana Adriana Montaño-arias Et Almentioning

confidence: 99%

“…Legume seeds are known to have physical dormancy (Baskin, 2003;Van Assche et al, 2003;Venier et al, 2012;Gehan-Jayasuriya et al, 2013), as Mimosa species (Martínez-Pérez et al, 2006;Gehan-Jayasuriya et al, 2013). Prior to any assay, all Mimosa seeds were washed with commercial detergent (3 g/100 ml water/3 min) (Camargo-Ricalde and Grether, 1998).…”

Section: Experimental Designmentioning

confidence: 99%

“…According to Lonsdale (1993), Gehan-Jayasuriya et al mosa species present physical dormancy and, because the seed coat has one or more impermeable layers of palisade cells, a physiological dormancy is also possible (Baskin et al, 2000). Therefore, scarifi cation is necessary to promote seed germination (Camargo-Ricalde and Grether, 1998;Gehan-Jayasuriya et al, 2013). Different seed scarifi cation methods have been documented for Mimosa species (De Souza-Araújo and De Castro-Andrade, 1983; Camargo-Ricalde and Grether, 1998;Martínez-Pérez et al, 2006;Silveira and Fernandes, 2006 In this study, mechanically scarifi ed seeds reached high germination percentages (over 70 %) for both taxa; while, unscarifi ed seeds only achieved 0-12 %.…”

Section: Effect Of Seed Scarifi Cation On Germinationmentioning

confidence: 99%

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Effect of scarification and temperature on seed germination of two Mexican species of Mimosa (Leguminosae-Mimosoideae)

et al. 2015

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It has been considered that Mimosa aculeaticarpa var. aculeaticarpa and M. luisana have the potential to restore temperate and semi-arid environments, respectively. Mature seeds were collected from eight mother plants per taxon to determine the effects of scarifi cation and temperature on seed germination of both taxa, and to defi ne the optimum temperature for germination. To obtain a representative sample of each taxon, seeds with the same weight and size were mixed. Five replicates of 20 seeds each (100 seeds per taxon/temperature, plus the control) were established. The seeds were mechanically scarifi ed and incubated under controlled conditions: 5 to 45 °C with 5 °C intervals, and a 12h light/12h darkness photoperiod. Results showed that scarifi cation and temperature were signifi cant factors in seed germination. In both taxa, germination was epigeal and phanerocotylar. The highest seed germination percentages were obtained when seeds were scarifi ed. 88 % of seeds of M. aculeaticarpa var. aculeaticarpa germinated at 25 °C. Hundred percent of seeds of M. luisana germinated at 30 °C. The optimum temperature for germination of seeds of both taxa was established at 25 °C. Mimosa taxa differ in the germination rate: M. luisana germinated at 6.6 seeds/day and M. aculeaticarpa var. aculeaticarpa at 3.4 seeds/day. Overall results suggest that, for both taxa, an increase or decrease in temperature will not inhibit seed germination, supporting the recommendation to use these plants for reforestation, as part of environmental restoration projects in temperate and semi-arid Mexican regions. Key words: arid tropical scrub, conservation, restoration, temperate forest.Resumen: Mimosa aculeaticarpa var. aculeaticarpa y M. luisana son taxa con potencial para la restauración ambiental. Se evaluaron los efectos de la escarifi cación y la temperatura en la germinación de semillas de ambos taxa y se defi nió la temperatura óptima de germinación, se colectaron semillas maduras de ocho individuos por especie. Las semillas (igual peso y tamaño) se mezclaron para obtener una muestra compuesta por taxon. Se establecieron cinco repeticiones de 20 semillas por taxon (100 semillas por taxon, por temperatura, más el control). Las semillas fueron escarifi cadas mecánicamente, realizando un corte en el extremo opuesto al eje del embrión e incubadas en un gradiente de 5 a 45 ºC, con intervalos de 5 °C y un fotoperíodo de 12h luz/12h oscuridad. Los resultados indican que la escarifi cación y la temperatura son factores signifi cativos para la germinación de las semillas. En ambos taxa, la germinación fue epígea y fanerocotilar. Los mayores porcentajes de germinación se obtuvieron cuando las semillas fueron escarifi cadas. Mimosa aculeaticarpa var. aculeaticarpa logró el 88 % de germinación a 25 °C; mientras que M. luisana alcanzó 100 % a 30 °C; sin embargo, para ambos taxa la temperatura óptima de germinación fue de 25 °C. La tasa de germinación difi ere, en M. luisana se registraron 6.6 semillas/día; mientras que en M. aculeati...

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Section: Susana Adriana Montaño-arias Et Almentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Section: Effect Of Seed Scarifi Cation On Germinationmentioning

confidence: 99%

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Effect of scarification and temperature on seed germination of two Mexican species of Mimosa (Leguminosae-Mimosoideae)

et al. 2015

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“…We hypothesize that heat shock would be sufficient to break the dormancy of seeds, or at least that they would survive to the exposure to higher temperatures. The species used in our study belonged to three subfamilies in the (Baskin & Baskin 2000;Jayasuriya et al 2013) and therefore, we chose species from this family to test our hypothesis.…”

mentioning

confidence: 99%

To resist or to germinate? The effect of fire on legume seeds in Brazilian subtropical grasslands

2016

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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 minute. Seeds were then placed to germinate for 60 days in 12/12 hours light/dark and 20/30ºC. Germination was generally low for all study species. Most species was not affected by heat shock treatments. However, Stylosanthes montevidensis was the only species that had its physical dormancy broken when exposed to 120ºC. The seeds of all the other species were neither stimulated nor killed by high temperatures. Although the exposure to high temperatures did not affect the germination of the study species (except for one), it also did not kill seeds, thereby showing that seeds are resistant to fire. Therefore, the rapid passage of fire in these grasslands is not sufficient to break the dormancy of most of the studied species of legumes.

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“…Ex situ collections are also used in research either on the species itself (Jayasuriya et al 2013, Mondoni et al 2011, Newton et al 2013, Way 2003 or to reach back in time, e.g. to assess ecosystem service decline (Molnár et al 2015) or climate change.…”

Section: Introductionmentioning

confidence: 99%

Seed collection data encompassing half of the vascular flora of the Pannonian Ecoregion stored by the Pannon Seed Bank

Török

Szilágyi

Halász

et al. 2016

Acta Botanica Hungarica

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Seed bank collections have multiple benefits: store genetic material for conservation and research, and their data can also provide valuable scientific information. The Pannon Seed Bank was established during an EU LIFE+ project between 2010 and 2014 with the target to collect and store seeds of approx. 50% of the wild native vascular flora of the Pannonian Biogeographic Region, seed accessions of at least 800 storable species. This task was fully achieved by the end of the project, as altogether 1,853 seed accessions of 910 species are stored. The aim of the present paper is to provide access to the collection data and metadata of the Pannon Seed Bank as it was completed by the end of the project. The collection campaign involved about 40 experts and covered the whole country. Collection and storing applied standard methodology, based on the ENSCONET project. The collection data published in this paper can be used manifold. Geographical data on species occurrences are major input for nature conservation and research. Seed collection date is valuable for ecological studies of phytophagous insects, frugivorous birds and mammals, etc. The database can be partner to international databases (like GBIF) or research infrastructures (e.g. LifeWatch). Hopefully, this data paper will contribute to further motivate the development of native seed collections and their use for conservation and research in Hungary.

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Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

Cited by 79 publications

References 38 publications

Effect of scarification and temperature on seed germination of two Mexican species of Mimosa (Leguminosae-Mimosoideae)

Effect of scarification and temperature on seed germination of two Mexican species of Mimosa (Leguminosae-Mimosoideae)

To resist or to germinate? The effect of fire on legume seeds in Brazilian subtropical grasslands

Seed collection data encompassing half of the vascular flora of the Pannonian Ecoregion stored by the Pannon Seed Bank

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