Evolutionary change in the germination niche between related species within Neoporteria clade (Cactaceae) is idiosyncratic to habitat type

Guerrero, Pablo; Mardones, Daniela; Viveros, Nataly; Peña-Gómez, Francisco T.; Bustamante, Ramiro O.

doi:10.4067/s0717-66432016000200177

Cited by 3 publications

(3 citation statements)

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“…In general, seeds of most plants studied stop germinating at water potentials between -0.5 and -2.0 MPa (Dürr et al 2015, Tribouillois et al 2016. These potentials are experimentally achieved with the use of different concentrations of three main substances: mannitol (Maldonado et al 2002, Guerrero et al 2016, polyethylene glycol (PEG) (Yang et al 2010, Luna & Chamorro 2016, Pantané et al 2016 and NaCl (Zhang et al 2010, Gorai et al 2014, El-Keblawy et al 2016.…”

Section: Seed Dormancy Rojas-aréchiga and Vázquez-yanesmentioning

confidence: 99%

“…In cacti, only four studies have assessed the germination at water potentials lower than -1.0 MPa (Martins et al 2012, Guerrero et al 2016, Aragón & Lasso 2018, Zerpa-Catanho et al 2019, maybe because in most cases the species do not achieve germination at such potentials (Flores & Briones 2001, Ramírez-Padilla & Valverde 2005, De La Rosa-Manzano & Briones 2010, Guillén et al 2011, Rodríguez-Morales et al 2013, Bispo et al 2018. The studies in cacti reveal that germination mainly occurs at water potentials between 0 and -0.6 MPa ( Figure 5) and at temperatures of 25 to 30 °C (Vega-Villasante et al 1996, Kin et al 2015, Bispo et al 2018.…”

Section: Seed Dormancy Rojas-aréchiga and Vázquez-yanesmentioning

confidence: 99%

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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%

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.

View full text Add to dashboard Cite

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“…Regeneration niche can be defined as biotic and abiotic requirements in earlier stages of the life cycles of a plant species (Grubb, 1977;Poorter, 2007). In this context, many studies have evaluated seed and seedlings responses to variables of the regeneration niche with the objective of understanding patterns of plant species distribution and their ability of habitat colonization (Poorter, 2007;Murray et al, 2005;Ranieri et al, 2012;Sõber and Ramula, 2013;Guerrero et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of light availability and seed size on germination and initial growth of two congeneric species of Fabaceae

et al. 2020

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Background and Aims: Environmental factors can interact with plant life history to determinate the reproductive strategies of adult plants and seedling recruitment. We expect that widely distributed tree species produce heavier seed and with greater variation in seed size than shrubs of restricted geographic distribution. We also predict that widely distributed tree species should be capable to germinate and develop under variable range of light conditions, while sun-adapted shrubs should germinate and develop better under high light intensity. We used as models two congeneric species of Fabaceae. Copaifera langsdorffii is a widely distributed arboreal species and C oblongifolia is a shrub with restricted distribution. Methods: Seeds were collected from two plant species in a Cerrado vegetation area, northern Minas Gerais, Brazil. The effects of light available on seed germination and seedling development was conducted in a germination chamber with controlled photoperiod, temperature and light intensity.Key results: The widely distributed tree (C. langsdorffii) had greater seed mass than the shrub (C. oblongifolia). Seeds of C. langsdorffii germinated faster under available high light, while the shrub C. oblongifolia seeds required less time to germinate under available low light and darkness. Under high light intensity, germination percentage of C. langsdorffii and C. oblongifolia seeds did not vary. However, seeds of the shrub showed a higher germination percentage under low light intensity and darkness. In general, seed mass showed a negative relationship with germination percentage, but this relationship varied in function of species and the availability of light. Copaifera langsdorffii seedlings had larger shoots and roots than C. oblongifolia. In contrast, the root:shoot ratio was higher in shrub than in tree species.Conclusions: Our results have important implications for understanding the patterns of distribution of two Copaifera species and explain the ability of C. oblongifolia to colonize disturbed areas.

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