Estructura genética y germinación de semillas en poblaciones portuguesas de &lt;em&gt;Cheirolophus uliginosus&lt;/em&gt; (Asteraceae): Implicaciones para su conservación

Vitales, Daniel; Pellicer, Jaume; Vallès, Joan; Garnatje, Teresa

doi:10.3989/collectbot.2013.v32.003

Cited by 4 publications

(1 citation statement)

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“…That is, do small populations have ID that could decrease germination? Germination percentages were significantly lower for cypselae produced in small than in large populations of Arnica montana in Germany (Kahmen and Poschlod, 2000), Cheirolophus uliginosus (Vitales et al, 2013), Centaurea jacea, Cirsium dissectum, Hypochaeris radicata (Soons and Heil, 2002), Lamyropsis microcephala (Mattana et al, 2012), Senecio paludosus (Winter et al, 2008) and Solidago albopilosa (Albrecht et al, 2020). On the other hand, the size of population was not significantly related to germination percentages for cypselae of Arnica montana in The Netherlands (Luijten et al, 2000), Carduus defloratus (Vaupel and Matthies, 2012), Cirsium dissectum (de Vere et al, 2009), Leucochrysum albicans var.…”

Section: Introductionmentioning

confidence: 88%

Seed dormancy in Asteraceae: a global vegetation zone and taxonomic/phylogenetic assessment

Baskin

2023

Seed Sci. Res.

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The Asteraceae with up to 30,000 species occurs on all continents except Antarctica and in all major vegetation zones on earth. Our primary aim was to consider cypselae dormancy-break and germination of Asteraceae in relation to ecology, vegetation zones and evolution. Cypselae are desiccation-tolerant and in various tribes, genera, species and life forms of Asteraceae are either non-dormant (ND) or have non-deep physiological dormancy (PD) at maturity. All six types of non-deep PD are found among the Asteraceae, and dormancy is broken by cold or warm stratification or by afterripening. Soil cypselae banks may be formed but mostly are short-lived. Much within-species variation in dormancy-break and germination has been found. Using data compiled for 1192 species in 373 genera and 35 tribes of Asteraceae, we considered ND and PD in relation to life form, vegetation zone and tribe. Senecioneae and Astereae had the best representation across the vegetation zones on earth. In evergreen and semi-evergreen rainforests, more species have ND than PD, but in all other vegetation zones, except alpine/high-latitude tundra (where ND and PD are equal), more species have PD than ND. Tribes in the basal and central grades and those in the Heliantheae Alliance have both ND and PD. The high diversity and lability of non-deep PD may have enhanced the rate of species diversification by promoting the survival of new species and/or species in new habitats that became available following globally disruptive events since the origin of the Asteraceae in the Late Cretaceous.

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Section: Introductionmentioning

confidence: 88%

Seed dormancy in Asteraceae: a global vegetation zone and taxonomic/phylogenetic assessment

Baskin

2023

Seed Sci. Res.

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Population size is not a reliable indicator of seed germination

Baskin,

Baskin

2023

Seed Sci. Res.

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Small isolated plant populations are one of the consequences of fragmentation of natural habitats by humans. We asked what effect does the creation of smaller populations from larger ones has on the plant fitness-related trait seed germination. Using information on 119 species (142 species entries) in 50 families, we found that seeds in only 35.2% of the species entries from larger populations germinated to higher percentages than those from smaller populations. In the other entries, seeds from large and small populations germinated equally well (57.7% of total entries) or seeds from small populations germinated better (7.0% of total entries) than those from large populations. These results indicate that population size is not a reliable predictor of seed germinability. Furthermore, there was little relationship between seed germination and either seed mass, genetic diversity or degree of population isolation, or between population size and genetic diversity.

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Conservation genetics of the rare Iberian endemicCheirolophus uliginosus(Asteraceae)

et al. 2015

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Cheirolophus uliginosus is a rare species, endemic to the south-western Iberian Peninsula, and listed as a characteristic taxon from the temperate Atlantic wet heaths, a priority habitat for conservation by the European Union. The conservation status of this species in most of its distribution area is poorly known, but, in recent times, some populations have disappeared and there has been a reduction in the number of individuals in others. In this context, we analysed the effects of population size on genetic diversity, revealing that genetic erosion and inbreeding depression could be having a significant impact on smaller populations. Furthermore, we studied the patterns of genetic structure and variability at the species level, finding a strikingly low within-population diversity and high among-population genetic differentiation. Finally, the genetic structure analyses suggested a long and complex phylogeographical history of C. uliginosus in the region, in agreement with the climate relict status proposed for this species.

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Estructura genética y germinación de semillas en poblaciones portuguesas de <em>Cheirolophus uliginosus</em> (Asteraceae): Implicaciones para su conservación

Cited by 4 publications

References 50 publications

Seed dormancy in Asteraceae: a global vegetation zone and taxonomic/phylogenetic assessment

Seed dormancy in Asteraceae: a global vegetation zone and taxonomic/phylogenetic assessment

Population size is not a reliable indicator of seed germination

Conservation genetics of the rare Iberian endemicCheirolophus uliginosus(Asteraceae)

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