Beetles as floral visitors in the Magnoliaceae: an evolutionary perspective

Hernández‐Vera, Gerardo; Navarrete-Heredia, José Luís; Vázquez-García, J. Antonio

doi:10.1007/s11829-021-09819-3

Cited by 5 publications

(3 citation statements)

References 90 publications

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“…Pollen transportation by beetles in Magnolia has been proven to be specific, effective, and to make a significant contribution to the cross-pollination ( Matsuki et al, 2008 ; Hernández-Vera et al, 2021 ). The seeds of M. fistulosa , like other Magnolia species, are consistent with bird dispersal syndromes ( Lomascolo et al, 2008 ).…”

Section: Discussionmentioning

confidence: 99%

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

et al. 2022

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Elucidating the genetic background of threatened species is fundamental to their management and conservation, and investigating the demographic history of these species is helpful in the determination of the threats facing them. The woody species of the genus Magnolia (Magnoliaceae) have high economic, scientific and ecological values. Although nearly half of all Magnolia species have been evaluated as threatened, to date there has been no population genetic study employing Next Generation Sequencing (NGS) technology in this genus. In the present study, we investigate the conservation genomics of Magnolia fistulosa, a threatened species endemic to the limestone area along the Sino-Vietnamese border, using a double digest restriction-site-associated DNA-sequencing (ddRAD-seq) approach. To increase the reliability of our statistical inferences, we employed two approaches, Stacks and ipyrad, for SNP calling. A total of 15,272 and 18,960, respectively, putatively neutral SNPs were generated by Stacks and ipyrad. Relatively high genetic diversity and large population divergence were detected in M. fistulosa. Although higher absolute values were calculated using the ipyrad data set, the two data sets showed the same trends in genetic diversity (π, He), population differentiation (FST) and inbreeding coefficients (FIS). A change in the effective population size of M. fistulosa within the last 1 Ma was detected, including a population decline about 0.5–0.8 Ma ago, a bottleneck event about 0.2–0.3 Ma ago, population fluctuations during the last glacial stage, and the recovery of effective population size after the last glacial maximum. Our findings not only lay the foundation for the future conservation of this species, but also provide new insights into the evolutionary history of the genus Magnolia in southeastern Yunnan, China.

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Section: Discussionmentioning

confidence: 99%

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

et al. 2022

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“…beetles and other smaller insects) and seed dispersers (i.e. birds) (Hernández‐Vera et al, 2021). Yet, for most Neotropical magnolias, it is not confirmed as data on pollinators and seed dispersers are lacking.…”

Section: Introductionmentioning

confidence: 99%

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Veltjen

Tamaki

Asselman

et al. 2022

Journal of Biogeography

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Aim Islands are ‘nature's laboratories of evolution’. Most island biogeographical studies have focussed on remote volcanic island chains. Here, we challenge island biogeographical patterns using a slowly evolving recent colonist present on five islands in a nonlinear chronosequence island chain. Location The Lesser Antilles (Caribbean). Taxon Magnolia dodecapetala (Magnoliaceae). Methods Genetic diversity was characterised using Sanger sequencing of 21 individuals amplified for 11 DNA markers, plus microsatellite data of 195 individuals genotyped with 19 simple sequence repeat (SSR) markers. Sanger sequencing data were used to construct a Bayesian phylogenetic hypothesis, while SSR markers were used to run approximate Bayesian computation (ABC) demographic analyses and calculate population statistics. Results Both types of molecular data support stepwise colonisation, decoupled from known island ages. The ABC analyses support a north to south migration while the Sanger sequencing data indicate a mixture of island progression rule and stepping stone dispersal. The SSR data show strong genetic structuring per island and significant inbreeding in all populations except in Saint Lucia. The lowest genetic diversity is found in the population from Saint Vincent. A high amount of genetic linkage occurs in a subpopulation from Dominica. Main Conclusions Biogeographical patterns in the complex geological setting of the Lesser Antilles are uncovered using a slowly evolving study species. All genetic data support treating each island as distinct Management Units for conservation and call for a re‐evaluation of the species limits. Inbreeding threatens the survival of island populations and the populations of Saint Vincent and Dominica represent conservation priorities.

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“…Se considera una las familias de temprana divergencia en las Angiospermas, debido a los hallazgos en registros fósiles, a la anatomía de la madera, estructura de su flor y a que su polen presenta una sola abertura para germinar, como las gimnospermas (Shankar 2020). Las flores en la familia Magnoliaceae tienen estambres y pistilos dispuestos en espiral, y se considera que esta disposición es un carácter ancestral de las gimnospermas controlada genéticamente (He et al 2004, Endress 2010) adicionalmente, el gineceo tiene carpelos múltiples a diferencia de la mayoría de las Angiospermas (Hernández-Vera et al 2021). En el neotrópico las flores de las Magnolias se diferencian en forma, tamaño, color, consistencia entre pétalos y sépalos (Gutiérrez-Lozano et al 2021).…”

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Germinación de semillas y desarrollo de plántulas de Magnolia guatapensis (Lozano) Govaerts (Magnoliaceae): una especie arbórea en peligro de extinción de Colombia

Restrepo-Cossio,

López-Álvarez,

Taborda-Arboleda

et al. 2023

Bot. Sci.

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Antecedentes: Las semillas de Magnolia guatapensis presentan dificultades para germinar y las plántulas tienen poco éxito en el desarrollo. Preguntas: ¿Cuánto tiempo tarda la germinación de semillas de M. guatapensis? ¿Existe alguna relación entre la esterilización del sustrato y la germinación? ¿Cuál es el efecto de los hongos micorrízicos arbusculares (AMF) en M. guatapensis? Especies de estudio: Magnolia guatapensis Sitio y años de estudio: Medellín, Colombia. Agosto 2020. Métodos: Se realizaron análisis de viabilidad de semillas con la prueba de tetrazolio y a través de la germinación. Luego, las plántulas se inocularon con Glomus spp, evaluando su crecimiento hasta 240 días de edad. La colonización de raíces de plántulas por HMA se comparó con árboles adultos. Resultados: Los frutos de M. guatapensis midieron 36 mm en promedio y presentaron 12 carpelos con 1 o 2 semillas cada uno. La viabilidad de semillas resultó en 23 % con la prueba de tetrazolio y en 57 % a través de la germinación en suelo esterilizado. El mayor porcentaje de germinación se obtuvo entre los días 38 y 40. En árboles, se observó 80.2 % de colonización por HMA. En plántulas no se observó colonización, presentaron mayor diámetro del tallo y área foliar cuando se inocularon con Glomus. Conclusiones: Con base en los resultados, la etapa de crecimiento de plántula de M. guatapensis es más crítica para la supervivencia de individuos. Se requiere continuar estudiando métodos exitosos de propagación de M. guatapensis y simbiosis con microorganismos para contribuir con la conservación de la especie.

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Beetles as floral visitors in the Magnoliaceae: an evolutionary perspective

Cited by 5 publications

References 90 publications

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Germinación de semillas y desarrollo de plántulas de Magnolia guatapensis (Lozano) Govaerts (Magnoliaceae): una especie arbórea en peligro de extinción de Colombia

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