Pleistocene radiation of the serpentine‐adapted genus <i>Hesperolinon</i> and other divergence times in Linaceae (Malpighiales)

Schneider, Adam C.; Freyman, William A.; Guilliams, C. Matt; Springer, Yuri P.; Baldwin, Bruce G.

doi:10.3732/ajb.1500379

Cited by 13 publications

(22 citation statements)

References 60 publications

(83 reference statements)

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“…For Githopsis and Hemizonia that were not present in the megaphylogeny, we determined their positions in the tree according to the Open Tree of Life and branch lengths according to family-level megaphylogeny. For all congeners, we obtained their relative positions and branch lengths from megaphylogeny, the Open Tree of Life or published genus-specific trees (47)(48)(49)(50)(51)(52)(53). In the cases where branch length was not available for a species (Astragalus rattanii, Calochortus amabilis, Castilleja attenuate, Castilleja rubicundula, Mimulus layneae, and Trifolium obtusiflorum), we used the phylogenetic information of the closest relative within the same genus as a surrogate from the aforementioned sources.…”

Section: Plant Phylogenymentioning

confidence: 99%

Pollinator niche partitioning and asymmetric facilitation contribute to the maintenance of diversity

Wei

Kaczorowski

Arceo‐Gómez

et al. 2020

Preprint

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Abstract:Mechanisms that favor rare species are key to the maintenance of diversity. One of the most critical tasks for biodiversity conservation is understanding how plant–pollinator mutualisms contribute to the persistence of rare species, yet this remains poorly understood. Using a process-based model that integrates plant–pollinator and interspecific pollen transfer networks with floral functional traits, we show that niche partitioning in pollinator use and asymmetric facilitation confer fitness advantage of rare species in a biodiversity hotspot. While co-flowering species filtered pollinators via floral traits, rare species showed greater pollinator specialization leading to higher pollination-mediated male and female fitness than abundant species. When plants shared pollinator resources, asymmetric facilitation via pollen transport dynamics benefited the rare species at the cost of the abundant ones, serving as an alternative diversity-promoting mechanism. Our results emphasize the importance of community-wide plant–pollinator interactions that affect reproduction for biodiversity maintenance.

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Section: Plant Phylogenymentioning

confidence: 99%

Pollinator niche partitioning and asymmetric facilitation contribute to the maintenance of diversity

Wei

Kaczorowski

Arceo‐Gómez

et al. 2020

Preprint

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“…Por otra parte, la presencia de H. micranthum en Baja California es soportada en este trabajo, pues además de los respaldos de especímenes en herbarios, esta especie constituye la única, de las 13 que incluye el género, con su distribución extendiéndose fuera de California, E.U.A. (Springer 2009, Schneider et al 2016. Actualmente la distribución de la especie es reportada en Oregón y en el norte de Baja California (Jepson eflora 2019), entre las localidades de Ensenada, Tecate y San Miguel, en la provincia biogeográfica Californiana (Morrone 2006, Delgadillo 1998.…”

Section: Resultsunclassified

“…Es importante mencionar la amenaza a la que esta provincia se encuentra sometida, particularmente por los asentamientos humanos, el turismo y el cambio de uso de suelo (Morrone 2019), lo que indirectamente puede implicar una amenaza a esta especie. Trabajos filogenéticos recientes han puesto en duda la validez del género Hesperolinon y se ha sugerido su retorno a Linum (McDill et al 2009, Schneider et al 2016. De llegarse a reconocer a las especies de Hesperolinon como miembros de Linum, sin duda la riqueza taxonómica de la familia cambiará.…”

Section: Resultsunclassified

La familia Linaceae en México: estado actual y perspectivas

et al. 2020

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Antecedentes: Linaceae ha sido reconocida a nivel mundial por su miembro agrícola, el lino, no obstante, existen más de 200 especies poco exploradas que representan un recurso agroeconómico con gran potencial. Preguntas: ¿Cuál es la riqueza taxonómica y distribución de Linaceae en México? ¿Cuál es el medio ecológico y cultural en el que se desarrolla? Especies de estudio: Linaceae Sitio/años de estudio: México, 1932-2019 Métodos: Se generó una base de datos a partir de la revisión en herbarios, medios digitales y literatura. Con la información recabada, así como el uso y diseño de mapas, se evaluaron los patrones de riqueza, distribución y endemismos, así como el medio ecológico y cultural de las especies. Resultados: Linaceae está representada en México por 27 especies nativas, 13 de ellas endémicas. Las entidades con más especies fueron Nuevo León (14), Tamaulipas (13), Coahuila y Puebla (12). Los matorrales xerófilos y bosques templados, junto con la provincia Sierra Madre Oriental, registraron la mayor riqueza. Las especies se desarrollan principalmente en pinares, encinares, suelos litosoles y feozem, climas templados y altitudes superiores a 1,000 m. El 18 % de las especies registran usos y más del 50 % se distribuyen en regiones con lengua náhuatl y otomí. Conclusiones: México cuenta con 10.4 % de la riqueza total de Linaceae, varias especies vulnerables, que junto a evidentes errores nomenclaturales, hacen indiscutible la necesidad de generar trabajos taxonómicos y de conservación en el grupo. El uso actual y potencial de las especies revela su importancia como un recurso vegetal valioso.

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“…The phylogenetic relationships of representatives of the genus Linum have been investigated using various molecular phylogenetic markers, including different methods of genomic fingerprinting, and also by comparison of a large number of coding sequences from cytoplasmic and nuclear genomes [28, 29, 45, 49–54]. Besides, for most taxa of the Linaceae family, the origin time was estimated [28, 29, 53]. It was shown that the genus Linum comprised the representatives of two related clades: yellow-flowered flax and blue-flowered flax.…”

Section: Discussionmentioning

confidence: 99%

Characterization of repeated DNA sequences in genomes of blue-flowered flax

et al. 2019

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Background Members of different sections of the genus Linum are characterized by wide variability in size, morphology and number of chromosomes in karyotypes. Since such variability is determined mainly by the amount and composition of repeated sequences, we conducted a comparative study of the repeatomes of species from four sections forming a clade of blue-flowered flax. Based on the results of high-throughput genome sequencing performed in this study as well as available WGS data, bioinformatic analyses of repeated sequences from 12 flax samples were carried out using a graph-based clustering method. Results It was found that the genomes of closely related species, which have a similar karyotype structure, are also similar in the repeatome composition. In contrast, the repeatomes of karyologically distinct species differed significantly, and no similar tandem-organized repeats have been identified in their genomes. At the same time, many common mobile element families have been identified in genomes of all species, among them, Athila Ty3/gypsy LTR retrotransposon was the most abundant. The 30-chromosome members of the sect. Linum (including the cultivated species L. usitatissimum ) differed significantly from other studied species by a great number of satellite DNA families as well as their relative content in genomes. Conclusions The evolution of studied flax species was accompanied by waves of amplification of satellite DNAs and LTR retrotransposons. The observed inverse correlation between the total contents of dispersed repeats and satellite DNAs allowed to suggest a relationship between both classes of repeating sequences. Significant interspecific differences in satellite DNA sets indicated a high rate of evolution of this genomic fraction. The phylogenetic relationships between the investigated flax species, obtained by comparison of the repeatomes, agreed with the results of previous molecular phylogenetic studies. Electronic supplementary material The online version of this article (10.1186/s12862-019-1375-6) contains supplementary material, which is available to authorized users.

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Pleistocene radiation of the serpentine‐adapted genus Hesperolinon and other divergence times in Linaceae (Malpighiales)

Cited by 13 publications

References 60 publications

Pollinator niche partitioning and asymmetric facilitation contribute to the maintenance of diversity

Pollinator niche partitioning and asymmetric facilitation contribute to the maintenance of diversity

La familia Linaceae en México: estado actual y perspectivas

Characterization of repeated DNA sequences in genomes of blue-flowered flax

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