Genetic Variation in the Epiphytes Tillandsia Ionantha and T. Recurvata (Bromeliaceae)

Soltis, Douglas E.; Gilmartin, Amy Jean; Gardner, Sue

doi:10.1002/j.1537-2197.1987.tb08673.x

Cited by 34 publications

(12 citation statements)

References 17 publications

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“…Levels of genetic diversity estimated from co-dominant allozyme and microsatellite markers in natural populations of bromeliads reveal from low to high variability, depending on the marker system and species analyzed (Supplementary Table S1, available online only at http://journals.cambridge.org) 1 . The levels of AFLP polymorphism and genetic diversity observed in Refer 'Soltis et al, 1987;Nybon and Bartish, 2000;Alves et al, 2004;Nybom, 2004;Barbará et al, 2007Barbará et al, , 2008Barbará et al, , 2009Palma-Silva et al, 2009, 2011Boisselier-Dubayle et al, 2010;Solorzano et al, 2010; Zanella et al, 2011' for details regarding Supplementary Table S1, available online only at E-mail: http://journals.cambridge.org.…”

Section: Resultsmentioning

confidence: 99%

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Conservation of Billbergia zebrina genetic resources: AFLP polymorphism of in vitro regenerated genotypes

et al. 2011

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Biotechnological techniques comprise useful tools for the conservation of endangered plant genetic resources. In the present work, polymorphism and usefulness of amplified fragment length polymorphism (AFLP) markers in assessing the genetic diversity in populations of Billbergia zebrina were investigated in nodular cultures and adult plants of the species. AFLP markers revealed moderate-to-high genetic diversity based on the estimations of Nei's gene diversity (mean H e ¼ 0.28), Shannon index of diversity (mean H S ¼ 0.48) and the number of polymorphic fragments (mean of 56.17 polymorphic fragments over six primer pairs). In comparison to published studies of population genetics performed in other bromeliad species, the present study suggests that natural populations of B. zebrina likely maintain high levels of genetic diversity, an important feature towards conservation of plant genetic resources. The results obtained reveal that AFLP markers comprise a powerful tool in order to assess the levels of genetic diversity in natural populations of this endangered species. Integrating AFLP markers with in vitro propagation techniques is understood as an adequate strategy for conservation programmes of this species.

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Section: Resultsmentioning

confidence: 99%

“… 1 Refer ‘Soltis et al , 1987; Nybon and Bartish, 2000; Alves et al , 2004; Nybom, 2004; Barbará et al , 2007, 2008, 2009; Palma-Silva et al , 2009, 2011; Boisselier-Dubayle et al , 2010; Solorzano et al , 2010; Zanella et al , 2011’ for details regarding Supplementary Table S1, available online only at .…”

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Conservation of Billbergia zebrina genetic resources: AFLP polymorphism of in vitro regenerated genotypes

et al. 2011

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“…This taxonomic bias is likely the result of the wide distribution and high abundance of many bromeliad species throughout the Neotropics (Paula et al 2016). More speci cally, Tillandsia recurvata L., has been featured most frequently in fragmentation studies (Chaves et al 2018(Chaves et al , 2021, as well as broader investigations of epiphyte population genetics (Soltis et al 1987;Solózano et al 2010). This concerted focus on T. recurvata may be determined by several key factors.…”

Section: Introductionmentioning

confidence: 99%

“…This concerted focus on T. recurvata may be determined by several key factors. For instance, T. recurvata has been found in high abundances throughout a wide geographic range, typically located within tropical and subtropical Northern and Southern America (Soltis et al 1987), as well as deciduous forest, coastal sand dune scrub and semi-deciduous forest (Bernal et al 2011). Moreover, this atmospheric bromeliad has been characterised as one of the most adaptable plants in the Western Hemisphere (Foster et al 1945), with valuable xerophytic qualities, such as small leaf size, CAM photosynthesis and absorbent leaf scales.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, this atmospheric bromeliad has been characterised as one of the most adaptable plants in the Western Hemisphere (Foster et al 1945), with valuable xerophytic qualities, such as small leaf size, CAM photosynthesis and absorbent leaf scales. T. recurvata also exhibits opportunistic traits, such as sel ng and high growth rates, which have allowed this species to reach extreme levels of abundance within fragmented landscapes, such as urban areas (Benzing 1980;Soltis et al 1987;Chaves et al 2021). As such, these traits make T. recurvata an ideal model to investigate the connectivity and genetic structure of epiphytic plants within understudied urban ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Surrounded by Concrete: Genetic Isolation of Tillandsia Recurvata L. in an Urban Landscape in South-Eastern Brazil

Quail

Ramos

Dallimore

et al. 2022

Preprint

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Increasing urban expansion has resulted in the decline of many natural and semi-natural communities globally. However, the connectivity and genetic structure of species that survive in these urban landscapes has received little attention, especially with regard to epiphytic plants. The aims of this study were to 1) investigate how an urban landscape can impact the connectivity and genetic structure of Tillandsia recurvata, L., a highly abundant and widely distributed atmospheric epiphyte; to 2) understand what the driving landscape factors are that affects connectivity and structure; and to 3) discuss how urbanisation can affect genetic structure in epiphytes. A total of 288 T. recurvata individuals were sampled across 65 trees throughout the city of Alfenas in South-East Brazil. We designed seven novel microsatellite markers and used four cross-amplified loci to determine the basic genetic structure of T. recurvata. All populations showed high global spatial genetic structure (SGS) and population differentiation. The high SGS of T. recurvata indicated low connectivity between urban populations, with strong evidence to suggest that this was the result of small population size and genetic drift. Pasture trees outside of the urban landscape are likely to be an important source of gene flow to isolated urban epiphyte populations. This study represents an important step towards understanding epiphyte population structure within urban landscapes. Low connectivity across urban landscapes is likely to benefit epiphytes such as T. recurvata due to their adaptability and high tolerance; suggesting a bleak future for many other more sensitive epiphyte species under predicted urbanisation globally.

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Possible combined effects of climate change, deforestation, and harvesting on the epiphyte Catopsis compacta: a multidisciplinary approach

Castillo

Trujillo‐Argueta

Gómez‐Ocampo

et al. 2013

Ecology and Evolution

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Climate change, habitat loss, and harvesting are potential drivers of species extinction. These factors are unlikely to act on isolation, but their combined effects are poorly understood. We explored these effects in Catopsis compacta, an epiphytic bromeliad commercially harvested in Oaxaca, Mexico. We analyzed local climate change projections, the dynamics of the vegetation patches, the distribution of Catopsis in the patches, together with population genetics and demographic information. A drying and warming climate trend projected by most climate change models may contribute to explain the poor forest regeneration. Catopsis shows a positive mean stochastic population growth. A PVA reveals that quasi-extinction probabilities are not significantly affected by the current levels of harvesting or by a high drop in the frequency of wet years (2%) but increase sharply when harvesting intensity duplicates. Genetic analyses show a high population genetic diversity, and no evidences of population subdivision or a past bottleneck. Colonization mostly takes place on hosts at the edges of the fragments. Over the last 27 years, the vegetation cover has being lost at a 0.028 years−1 rate, but fragment perimeter has increased 0.076 years−1. The increases in fragment perimeter and vegetation openness, likely caused by climate change and logging, appear to increase the habitat of Catopsis, enhance gene flow, and maintain a growing and highly genetically diverse population, in spite of harvesting. Our study evidences conflicting requirements between the epiphytes and their hosts and antagonistic effects of climate change and fragmentation with harvesting on a species that can exploit open spaces in the forest. A full understanding of the consequences of potential threatening factors on species persistence or extinction requires the inspection of the interactions of these factors among each other and their effects on both the focus species and the species on which this species depends.

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Genetic Variation in the Epiphytes Tillandsia Ionantha and T. Recurvata (Bromeliaceae)

Cited by 34 publications

References 17 publications

Conservation of Billbergia zebrina genetic resources: AFLP polymorphism of in vitro regenerated genotypes

Conservation of Billbergia zebrina genetic resources: AFLP polymorphism of in vitro regenerated genotypes

Surrounded by Concrete: Genetic Isolation of Tillandsia Recurvata L. in an Urban Landscape in South-Eastern Brazil

Possible combined effects of climate change, deforestation, and harvesting on the epiphyte Catopsis compacta: a multidisciplinary approach

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