Analysis of mating system and genetic structure in the endangered, amphicarpic plant, Lewton’s polygala (Polygala lewtonii)

Swift, Joel F.; Smith, Stacy A.; Menges, Eric S.; Bassüner, Burgund; Edwards, Christine E.

doi:10.1007/s10592-016-0860-3

Cited by 15 publications

(39 citation statements)

References 70 publications

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“…It is still peculiar that chasmogamous reproductive effort exceeds cleistogamous efforts the reverse of what is seen in most other species. A recent population genetic study found that most individuals surviving to adulthood are progeny from cleistogamous seeds (Swift et al 2016), suggesting a higher fitness for cleistogamous progeny. This also raises the question of why so much effort is being put into CH if few outcrossed progeny are represented in the next generation of reproductive individuals.…”

Section: Discussionmentioning

confidence: 99%

“…Subterranean CL occurs on rhizomes extending from the base of the plant. A recent study examining the spatial genetics of P. lewtonii suggested most recruitment is from cleistogamous seeds (Swift et al 2016). For the remainder of this study we refer to chasmogamy as CH, above-ground cleistogamy as CL-AG and below-ground cleistogamy as CL-BG.…”

Section: Introductionmentioning

confidence: 99%

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Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

et al. 2017

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Our research explores patterns of mixed-mating in the endemic, federally listed Polygala lewtonii. This perennial herb has open-pollinated chasmogamous flowers and self-pollinated cleistogamous flowers on both above- and below-ground stems. Data collected from 2008 - 2012 shows temporal separation of chasmogamy (January to May) and cleistogamy (June to February) with little overlap. A quarter of plants flowered all three flower morphs at least once during their lifespan while slightly less than half produced chasmogamous and above-ground cleistogamous flowers but no below-ground structures. Estimated fruit maturation was found to be seven times greater for chasmogamy compared to both forms of cleistogamy.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

et al. 2017

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“…The genetic uniformity of local populations of E. spinosa suggests that this species predominantly is self-pollinated. Analysis of 11 microsatellite loci in the amphicarpic species Polygala lewtonii also revealed high levels of inbreeding (Swift et al, 2016). Using simple sequence repeats (SSRs), Zhang et al (2005) demonstrated that selfing is more common than outcrossing in populations of A. edgeworthii.…”

Section: Genetics and Quantitative Genetic Variationmentioning

confidence: 99%

Amphicarpic plants: definition, ecology, geographic distribution, systematics, life history, evolution and use in agriculture

Zhang

Baskin

et al. 2020

Biological Reviews

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Although most plants produce all of their fruits (seeds) aboveground, amphicarpic species produce fruits (seeds) both above‐ and belowground. Our primary aims were to determine the number of reported amphicarpic species and their taxonomic, geographic, life form and phylogenetic distribution, to evaluate differences in the life history of plants derived from aerial and subterranean seeds, to discuss the ecological and evolutionary significance of amphicarpy, to explore the use of amphicarpic plants in agriculture, and to suggest future research directions for studies on amphicarpy. Amphicarpy occurs in at least 67 herbaceous species (31 in Fabaceae) in 39 genera and 13 families of angiosperms distributed in various geographical regions of the world and in various habitats. Seeds from aerial and subterranean fruits differ in size/mass, degree of dormancy, dispersal and ability to form a persistent seed bank, with aerial seeds generally being smaller, more dormant and more likely to be dispersed and to form a seed bank than subterranean seeds. In addition, plants produced by aerial and subterranean seeds may differ in survival and growth, competitive ability and biomass allocation to reproduction. Amphicarpic plants may exhibit a high degree of plasticity during reproduction. Subterranean fruits are usually formed earlier than aerial ones, and plants may produce only subterranean propagules under stressful environmental conditions. Differences in the life histories of plants from aerial and subterranean seeds may be an adaptive bet‐hedging strategy.

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“…Concurrently, empirical studies have increasingly showed that genetic data can provide important information that is relevant for conservation. Population genetic data provides basic information about the biology of a species, such as its mating system and spatial extent of dispersal or pollination [35][36][37] , which can be important for devising conservation strategies. It is also used to evaluate whether populations have been affected by ecological or demographic processes, such as evaluating the effects of fragmentation on population connectivity 38 or determining whether populations have experienced inbreeding, genetic drift, or population bottlenecks 39 .…”

Section: History and Rationale For The Use Of Conservation Genetics Amentioning

confidence: 99%

The Development of Plant Conservation in Botanic Gardens and the Current and Future Role of Conservation Genetics for Enhancing Those Conservation Efforts

Edwards

Jackson

2019

Mol. Front. J.

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Botanic gardens play major roles in plant conservation globally. Since the 1980s, the number of botanic gardens worldwide and their involvement in integrating ex situ and in situ plant conservation has increased significantly, with a growing focus on understanding, documenting, and capturing genetic diversity in their living collections. This article outlines why genetic diversity is important for conservation, and explores how botanic gardens can establish and expand the use of molecular techniques to support their plant conservation efforts.

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Analysis of mating system and genetic structure in the endangered, amphicarpic plant, Lewton’s polygala (Polygala lewtonii)

Cited by 15 publications

References 70 publications

Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

Amphicarpic plants: definition, ecology, geographic distribution, systematics, life history, evolution and use in agriculture

The Development of Plant Conservation in Botanic Gardens and the Current and Future Role of Conservation Genetics for Enhancing Those Conservation Efforts

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