Effects of long-term seed storage on germination of 13 cactus species from central Argentina

Gurvich, Diego E.; Lorenzati, Marina A.; Pivatto, María Susana Sosa; Bauk, Karen; Barroso, Francisco

doi:10.1016/j.jaridenv.2020.104382

Cited by 11 publications

(14 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, many cacti form persistent soil seed banks, usually short-lived (e.g. Bowers 2005;Goodman et al 2012;Lindow-López et al 2018), including several of the species studied here (Gurvich et al 2021); although in some cases their viability may last for a few years (Thompson et al 1997;Lindow-López et al 2018;Gurvich et al 2021). Finally, very few species have been reported to have serotiny (Rodríguez-Ortega et al 2006;Santini & Martorell 2013;Barrios et al 2020).…”

Section: Introductionmentioning

confidence: 82%

“…The main dispersal agents are ants, small mammals and birds (Rojas-Aréchiga & Vázquez-Yanes 2000;Soriano & Ruiz 2002;Gomes et al 2014). Species can present soil seed banks, usually short-termed (Gurvich et al 2021), and there is no evidence that the selected species present serotiny and/or seed dormancy. All species occur in the Chaco Serrano District (Cabrera 1976), in north-western Córdoba province, central Argentina, where seeds were collected.…”

Section: Selection Of Species and Study Areamentioning

confidence: 99%

“…2018), including several of the species studied here (Gurvich et al . 2021); although in some cases their viability may last for a few years (Thompson et al . 1997; Lindow‐López et al .…”

Section: Introductionmentioning

confidence: 99%

“…2018; Gurvich et al . 2021). Finally, very few species have been reported to have serotiny (Rodríguez‐Ortega et al .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Are wildfires affecting seed germination in cactus? An experimental assessment

2021

Self Cite

View full text Add to dashboard Cite

Cacti are conspicuous plants across arid and semi-arid ecosystems of the American continent and are currently under threat due to human pressures, such as habitat loss, illegal collection and changes in fire regimes. Although much of their habitat is highly fire prone, there are strikingly few studies on their germination response to fire cues. The aim of this work was to analyse the effect of heat shock (simulating wildfires) on the 'germination %' and the 'mean germination time' of 13 cactus species of two growth forms (six columnar and seven globose) from a fire-prone cactus diversity hotspot in Córdoba Mountains, central Argentina. We also analysed the effect of growth form and seed mass on species responses. Seeds were subjected to the following treatments: 70°C/5 min, 70°C/10 min, 105°C/5 min, 105°C/10 min and a control (i.e. no heat). Germination decreased under at least one treatment in seven species, increased in three species, had contrasting changes in one species, and showed no effect of treatments in two species. Germination was faster in eight species, slower in one species and showed no effects of treatments in four species. Germination was significantly higher for globose species following the 70°C/10 min treatment and for columnar species under the treatment of 110°C/ 10 min; while germination time did not differ between growth forms. Seed mass did not have a significant effect on germination, and only affected germination time under the 70°C treatments, under which lighter seeds germinated faster than heavier seeds. Our results show that the studied species exhibited a high diversity of responses, with most of the species presenting tolerance to heat shock, and that under certain conditions growth form and seed mass are important traits related to species responses to heat shock treatments.

show abstract

Section: Introductionmentioning

confidence: 82%

Section: Selection Of Species and Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…2018; Gurvich et al . 2021). Finally, very few species have been reported to have serotiny (Rodríguez‐Ortega et al .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Are wildfires affecting seed germination in cactus? An experimental assessment

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…El experimento se realizó cinco meses después de haberse colectado las semillas. En cada caja de Petri se colocaron 20 semillas, que fueron mantenidas en una cámara de germinación a 15/25 °C y un fotoperíodo de luz de 12 hrs en oscuridad y 12 hrs de luz (Gurvich et al 2021). Se registró la germinación cada 48 hrs durante 30 días, siendo la protrusión de la radícula el indicador de semilla germinada.…”

Section: Materiales Y Métodosunclassified

Asociaciones entre las características reproductivas y la abundancia en Gymnocalycium quehlianum (Cactaceae) a lo largo de un gradiente altitudinal

2021

Self Cite

View full text Add to dashboard Cite

Antecedentes: A pesar de que las especies pueden presentar amplios rangos altitudinales, poco se conoce acerca de cómo varía su abundancia y de las variables asociadas a esta variación. Hipótesis: Existirá una asociación entre la abundancia y características reproductivas, como peso de la semilla, la germinación y el tamaño y forma de las plántulas a lo largo de un gradiente altitudinal. Especies de estudio: Gymnocalycium quehlianum Sitio de estudio y fecha: Sierras Chicas, Provincia de Córdoba, Argentina. 2015-2016. Métodos: se midió la densidad y la estructura poblacional en tres sitios de la distribución de G. quehlianum en un gradiente altitudinal, a 615, 948 y 1,257 m snm. Se pesaron las semillas, se determinó el porcentaje y el tiempo medio de germinación (TMG), y se midió la longitud y diámetro de las plántulas. Resultados: El peso de las semillas fue menor en la población de altitud intermedia, mientras que el porcentaje y el TMG no variaron significativamente entre las altitudes. El tamaño de la plántula fue menor en la altitud intermedia, mientras que la forma de las plántulas de las poblaciones extremas presentó una forma más alargada. Conclusiones: No existe una relación entre la abundancia poblacional a lo largo del gradiente altitudinal y las variables analizadas. Algunas variables no presentaron diferencias a lo largo del gradiente, como el porcentaje de germinación y el tiempo medio de germinación; otras variables como el peso de la semilla y la forma y tamaño de las plántulas lo hicieron de manera contraria a lo esperado.

show abstract