Intraspecific polyploidy in Pteris vittata Linn.

Khare, Priyanka; Kaur, Surjit

doi:10.1508/cytologia.48.21

Cited by 12 publications

(10 citation statements)

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“…Diverse ploidy levels and reproductive modes have been recorded, including sexual diploids, triploids, sexual and apogamous tetraploids, pentaploids, and hexaploids (Table 1). Furthermore, the spore mother cells show a variety of multivalents, such as 20I + 26II + 5III, 9I + 45II + 3III + 2IV, 29II + 29I, and 29II + 87I [17,18], indicating the occurrence of allopolyploidy. The species involved are not clear, and further taxonomical study on this species complex is needed.…”

Section: Polyploidy and The Variation Of Pteris Speciesmentioning

confidence: 99%

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Polyploidy and Speciation in Pteris (Pteridaceae)

et al. 2012

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The highest frequency of polyploidy among plants is considered to occur in the Pteridophytes. In this study, we focused on polyploidy displayed by a specific fern taxon, the genus Pteris L. (Pteridaceae), comprising over 250 species. Cytological data from 106 Pteris species were reviewed. The base number of chromosomes in Pteris is 29. Polyploids are frequently found in Pteris, including triploids, tetraploids, pentaploids, hexaploids, and octoploids. In addition, an aneuploid species, P. deltodon Bak., has been recorded. Furthermore, the relationship between polyploidy and reproductive biology is reviewed. Among these 106 Pteris species, 60% exhibit polyploidy: 22% show intraspecific polyploidy and 38% result from polyploid speciation. Apogamous species are common in Pteris. Diploids are the most frequent among Pteris species, and they can be sexual or apogamous. Triploids are apogamous; tetraploids are sexual or apogamous. Most Pteris species have one to two ploidy levels. The diverse ploidy levels suggest that these species have a complex evolutionary history and their taxonomic problems require further clarification.

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Section: Polyploidy and The Variation Of Pteris Speciesmentioning

confidence: 99%

“…Some Pteris species have several different ploidy levels and are found in several geographical areas, such as P. cretica and P. vittata [11,17,18], which likely reflect the ecological differentiation within species. For example, different niche preferences have been found in P. fauriei [19].…”

Section: Introductionmentioning

confidence: 99%

Polyploidy and Speciation in Pteris (Pteridaceae)

et al. 2012

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“…The success of many polyploid taxa has been associated with numerous changes that may differentiate them from their diploid ancestors. For example, polyploidy can influence genetic variation (e.g., Klekowski and Baker 1966;Roose and Gottlieb 1976;Soltis and Rieseberg 1986;Moody et al 1993;Ainouche et al 1995;Purdy and Bayer 1995;Song et al 1995;Ehrendorfer et al 1996), life histories (e.g., Marks 1966;Smith and Phipps 1988;Barrett 1989;Husband and Schemske 1997), morphology (e.g., Khare and Kaur 1983;Patwary et al 1989;Chmielewski 1994;Vandenhout et al 1995), physiology (e.g., Tiwari et al 1980;Levin 1983;Koul et al 1985;Bhargava et al 1988;Warner and Edwards 1989;Griesbach and Kamo 1996;Letchamo 1996), and geographic distributions (e.g., Tothill and Hacker 1976;Novak et al 1991;Van Dijk et al 1992;Lamade et al 1994;Husband and Schemske 1998).…”

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confidence: 99%

Plant Polyploidy and Pollination: Floral Traits and Insect Visits to Diploid and Tetraploid Heuchera grossulariifolia

Segraves¹,

Thompson²

1999

Evolution

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In many polyploid species, polyploids often have different suites of floral traits and different flowering times than their diploid progenitor species. We hypothesized that such differences in floral traits in polyploids may subsequently affect their interactions with pollinating and other insect visitors. We measured floral morphology and flowering phenology in 14 populations of diploid and autotetraploid Heuchera grossulariifolia Rydb. (Saxifragaceae), determined if repeated evolution of independent polyploid lineages resulted in differentiation in floral morphology among those lineages, and ascertained if there was a consistent pattern of differentiation among genetically similar diploid and autotetraploid populations. In addition, we evaluated the differences in suites of floral visitors within a natural community where diploids and autotetraploids occur sympatrically. Overall, flowers of autotetraploid plants were larger and shaped differently than those of diploids, had a different flowering phenology than that of diploids, and attracted different suites of floral visitors. In comparison with flowers of diploids, tetraploid floral morphology varied widely from pronounced differences between cytotypes in some populations to similar flower shapes and sizes between ploidallevels in other populations. Observations of floral visitors to diploids and autotetraploids in a natural sympatric population demonstrated that the cytotypes had different suites of floral visitors and six of the 15 common visitors preferentially visited one ploidy more frequently. Moreover, we also found that floral morphology differed among independent auto tetraploid origins, but there was no consistent pattern of differentiation between genetically similar diploid and auto tetraploid populations. Hence, the results suggest that the process of polyploidization creates the potential for attraction of different suites of floral visitors. Multiple origins of polyploidy also presents the opportunity for new or different plant-insect interactions among independent polyploid lineages. These differences in turn may affect patterns of gene flow between diploids and polyploids and also among plants of independent polyploid origin. Polyploidy, therefore, may result in a geographic mosaic of interspecific interactions across a species' range, contributing to diversification in both plant and insect groups.

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“…The success of many polyploid taxa has been associated with numerous changes that may differentiate them from their diploid ancestors. For example, polyploidy can influence genetic variation (e.g., Klekowski and Baker 1966;Roose and Gottlieb 1976;Soltis and Rieseberg 1986;Moody et al 1993;Ainouche et al 1995;Purdy and Bayer 1995;Song et al 1995;Ehrendorfer et al 1996), life histories (e.g., Marks 1966;Smith and Phipps 1988;Barrett 1989;Husband and Schemske 1997), morphology (e.g., Khare and Kaur 1983;Patwary et al 1989;Chmielewski 1994;Vandenhout et al 1995), physiology (e.g., Tiwari et al 1980;Levin 1983;Koul et al 1985;Bhargava et al 1988; Warner and Edwards 1989;Griesbach and Kamo 1996;Letchamo 1996), and geographic distributions (e.g., Tothill and Hacker 1976;Novak et al 1991; Van Dijk 2 Present address: Department of Biology, Vanderbilt University, Box l8l2-B, Nashville, Tennessee 37235; E-mail: k.segraves@ vanderbilt.edu. Lamade et al 1994; Husband and Schemske 1998).…”

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confidence: 99%

PLANT POLYPLOIDY AND POLLINATION: FLORAL TRAITS AND INSECT VISITS TO DIPLOID AND TETRAPLOID HEUCHERA GROSSULARIIFOLIA

1999

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Abstract.-In many polyploid species, polyploids often have different suites of floral traits and different flowering times than their diploid progenitor species. We hypothesized that such differences in floral traits in polyploids may subsequently affect their interactions with pollinating and other insect visitors. We measured floral morphology and flowering phenology in 14 populations of diploid and autotetraploid Heuchera grossulariifolia Rydb. (Saxifragaceae), determined if repeated evolution of independent polyploid lineages resulted in differentiation in floral morphology among those lineages, and ascertained if there was a consistent pattern of differentiation among genetically similar diploid and autotetraploid populations. In addition, we evaluated the differences in suites of floral visitors within a natural community where diploids and autotetraploids occur sympatrically. Overall, flowers of autotetraploid plants were larger and shaped differently than those of diploids, had a different flowering phenology than that of diploids, and attracted different suites of floral visitors. In comparison with flowers of diploids, tetraploid floral morphology varied widely from pronounced differences between cytotypes in some populations to similar flower shapes and sizes between ploidallevels in other populations. Observations of floral visitors to diploids and autotetraploids in a natural sympatric population demonstrated that the cytotypes had different suites of floral visitors and six of the 15 common visitors preferentially visited one ploidy more frequently. Moreover, we also found that floral morphology differed among independent auto tetraploid origins, but there was no consistent pattern of differentiation between genetically similar diploid and auto tetraploid populations. Hence, the results suggest that the process of polyploidization creates the potential for attraction of different suites of floral visitors. Multiple origins of polyploidy also presents the opportunity for new or different plant-insect interactions among independent polyploid lineages. These differences in turn may affect patterns of gene flow between diploids and polyploids and also among plants of independent polyploid origin. Polyploidy, therefore, may result in a geographic mosaic of interspecific interactions across a species' range, contributing to diversification in both plant and insect groups. The evolution of polyploidy has played a major role in the creation and maintenance of plant biodiversity (e.g., Thompson and Lumaret 1992;Soltis andSoltis 1993, 1995;Song et al. 1995;Goldblatt and Takei 1997). About one-half of all angiosperm species are thought to have polyploids in their lineages (Stebbins 1971;Averett 1980;DeWet 1980;Levin 1983;Masterson 1994), and within polyploid species, multiple origins of polyploidy are considered the rule ; reviewed in Soltis and Soltis 1993). The success of many polyploid taxa has been associated with numerous changes that may differentiate them from their diploid ancestors. For example, poly...

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Intraspecific polyploidy in Pteris vittata Linn.

Cited by 12 publications

References 4 publications

Polyploidy and Speciation in Pteris (Pteridaceae)

Polyploidy and Speciation in Pteris (Pteridaceae)

Plant Polyploidy and Pollination: Floral Traits and Insect Visits to Diploid and Tetraploid Heuchera grossulariifolia

PLANT POLYPLOIDY AND POLLINATION: FLORAL TRAITS AND INSECT VISITS TO DIPLOID AND TETRAPLOID HEUCHERA GROSSULARIIFOLIA

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