Do cacti form soil seed banks? An evaluation using species from the Southern Central Andes

Lindow‐López, L.; Galíndez, Guadalupe; Sühring, Silvia; Pastrana‐Ignes, Valeria; Gorostiague, Pablo; Gutiérrez, Agustina; Ortega–Baes, Pablo

doi:10.1111/plb.12868

Cited by 12 publications

(18 citation statements)

References 28 publications

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“…There are few studies that have submitted the seeds to environmental conditions and have examined their viability after different burial periods (Bowers 2000, 2005, Matías-Palafox 2007Olvera-Carrillo et al 2009, Cheib & Souza 2012, Goodman et al 2012, Álvarez-Espino et al 2014, Ordoñez-Salanueva et al 2017, Lindow-López et al 2018a, Aragón-Gastélum et al 2018 or have assessed the effective seed bank, extracting the seeds from the soil in different times of the year (Montiel & Montaña 2003). Only the studies of Bowers (2005) and Ordoñez-Salanueva et al (2017) shows two species (Mammillaria grahamii and Polaskia chende) capable of possessing a long-term, continuous seed bank (up to at least five years) according to the classification of Bakker et al (1996).…”

Section: Seed Dormancy Rojas-aréchiga and Vázquez-yanesmentioning

confidence: 99%

Seed traits and germination in the Cactaceae family: A review across Americas

Barrios¹,

Sánchez²,

Flores³

et al. 2020

Bot. Sci.

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Background: Cactaceae is the fifth taxonomic group with the highest proportion of threatened species and among the angiosperms, the most vulnerable to human disturbance. One way to contribute to the preservation of this family is to understand the processes that promote seed germination. Questions: Have the relationship between seed traits and cactus germination been documented? How common is dormancy and seed banks in Cactaceae? Are there general patterns in cacti germination response to temperature, light, water, salinity, phytohormones, hydration/dehydration cycles, mechanical or chemical scarification? Data description: A total of 333 studies on cactus germination with information on 409 taxa. Study site and dates: since 1939 to January 2020. Methods: A search of scientific articles in Google Scholar was performed with the words Cactaceae, cacti and cactus, in combination with various matters on germination in English, Spanish and Portuguese. Results: The main germination studies in cactus deal with photoblasticism (275 taxa), temperature (205 taxa) and seed longevity (142 taxa). Other lines of study in cactus germination (e.g., desiccation tolerance, vivipary, phytohormones, mechanical or chemical scarification, in vitro germination, hydration/dehydration cycles, water and saline stress, serotiny, storage in cold, high temperature tolerance and soil seed bank) include between 14 and 65 taxa. Cacti have only physiological dormancy and optimal germination for most species occur between 20 and 30 °C. Photoblasticism is strongly influenced by phylogeny with 80.9 % positive photoblastic species. Conclusions: Mexico, Brazil and Argentina are the three leading countries in the study of cactus germination.

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Section: Seed Dormancy Rojas-aréchiga and Vázquez-yanesmentioning

confidence: 99%

Seed traits and germination in the Cactaceae family: A review across Americas

Barrios¹,

Sánchez²,

Flores³

et al. 2020

Bot. Sci.

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“…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: 88%

“…Some of the mentioned characteristics may have adaptive value for cacti response to fire (Thomas 1991;Gurvich et al 2015;Lindow-López et al 2018). For example, post-fire mortality of adult plants is often >50%, but rarely reach total mortality, since most cacti persist by survival of the apical meristem (Thomas 1991(Thomas , 2006.…”

Section: Introductionmentioning

confidence: 99%

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Are wildfires affecting seed germination in cactus? An experimental assessment

2021

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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.

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“…So far, the study of seed soil banks in cacti is limited and few studies have evaluated the distribution, density and viability of seeds in nature (Álvarez-Espino et al, 2014). Considering that C. polylophus seeds are neutral photoblastic (Rojas-Aréchiga, 2014) and the ecological longevity (viability in nature) is expected to differ from the potential longevity (Álvarez-Espino et al, 2014;Ordonez-Salanueva et al, 2017), there is a need to evaluate seed viability in natural conditions and over long time periods, such that if seeds can remain viable in nature for more than a year it would suggest a potential to form a short-term persistent seed bank (Thompson et al, 1993;Mandujano et al, 1998;Clark et al, 2007;Ordonez-Salanueva et al, 2017;Lindow-López et al, 2018).…”

Section: Seed Predation 316mentioning

confidence: 99%

Factors Affecting Germination and Establishment Success of an Endemic Cactus of the Chihuahuan Desert

Martínez

Golubov

Mandujano

et al. 2021

Preprint

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Seeds and seedlings are the most critical stages of cacti life cycles. From the thousands of seeds produced in a reproductive season, only a small fraction successfully germinate, the rest are lost to predation, go dormant and remain viable in the seed bank or lose viability. These early stages often depend on facilitation by nurse plants for germination and seedling recruitment. We aim to prescribe actions for the conservation of Cephalocereus polylophus by improving recruitment in the population. The viability of seeds with different storage times was evaluated as an indicator of their potential to form a short-term seed bank. Through the analysis of seed germination and seedling survival under the canopy of two nurse plant species and open areas, we assessed the importance of facilitation for recruitment. A predator exclusion experiment evaluated the intensity of herbivory on seeds and seedlings of different ages. Seeds had germination rates above 90\% under laboratory conditions, even after two years of storage. Seed germination was only registered under one of the two nurses and after two years, up to 4 % of the seedlings planted under both nurse plants survived and protection against herbivores increased seedlings survival. Considering that facilitation and age are crucial for seedling survival of C. polylophus, future conservation programs should include the protection of plant communities and the introduction of seedlings instead of seeds.

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Do cacti form soil seed banks? An evaluation using species from the Southern Central Andes

Cited by 12 publications

References 28 publications

Seed traits and germination in the Cactaceae family: A review across Americas

Seed traits and germination in the Cactaceae family: A review across Americas

Are wildfires affecting seed germination in cactus? An experimental assessment

Factors Affecting Germination and Establishment Success of an Endemic Cactus of the Chihuahuan Desert

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