Stylar polymorphism, reciprocity and incompatibility systems in Nymphoides montana (Menyanthaceae) endemic to southeastern Australia

Haddadchi, Azadeh

doi:10.1007/s00606-012-0729-y

Cited by 15 publications

(9 citation statements)

References 51 publications

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“…Lloyd and Webb () suggested, during the build‐up of reciprocal herkogamy, selection exerted by pollinators may be more intense to segregate stigmas. In our research, variation of stigma height was larger than anther height in most dimorphic species, and the distance of average stigma heights were also larger than the distance of average anther heights between morphs (Table 4), consistent with former reports (Baker , Ganders , Lloyd and Webb , Richards , Arroyo and Barrett , Baker et al , Ferrero et al , Haddadchi ). However, population XTBG of M. macrophylla showed a reverse mode with greater variation in anther height than stigma height, caused by the unusual stigma height in the S‐morph (Supplementary material Appendix 1, Fig.…”

Section: Discussionsupporting

confidence: 92%

“…It may be calculated in a macro developed by Sánchez et al (2008) and programmed with MS Visual Basic in MS Excel. It has been applied in a series of studies of distylous species (Faria et al 2012, Bramow et al 2013, Haddadchi 2013). An extension called reciprocity index 2.0 was proposed by Sánchez et al (2013) to facilitate comparisons between distylous and tristylous populations, and its highest value represent the highest reciprocity, making it more intuitive.…”

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confidence: 99%

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Pollen–ovule ratios are strongly correlated with floral reciprocity, in addition to sexual system, in Mussaenda (Rubiaceae)

Yuan

Shi

Deng

et al. 2017

Nordic Journal of Botany

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Heterostyly is a floral polymorphism that increase inter‐morph pollen transfer and promote disassortative mating. Breakdown of heterostyly has happened many times, either leading to dioecy or monomorphism. Mussaenda is a genus with diverse sexual systems including distyly, dioecy, floral monomorphism, and homostyly, making it an ideal system to study the evolution of floral traits and their relationship with sexual system shifts. Here, floral traits and pollen–ovule (P/O) ratios were estimated and used to test hypotheses about the relationships among P/O ratios, floral trait evolution, and sexual system shifts. Our results revealed that there is no significant difference of reciprocity in upper level sexual organs between species with different sexual systems. The reciprocity indices of the lower level sexual organs, however, are smaller in species with functional dioecy than in those with distyly. P/O ratios in dimorphic Mussaenda species were relatively lower than in monomorphic outcrossing species, but did not differ significantly between species with distyly and functional dioecy. Populational P/O ratios were negatively correlated with reciprocity index in the dimorphic species. We suggest that the loss of function in lower level organs in species with functional dioecy has resulted from less strict reciprocity. The relationship between P/O ratios and reciprocity indices strongly support that efficient disassortative pollination of distylus flowers may have promoted evolution towards low P/O ratios.

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Section: Discussionsupporting

confidence: 92%

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confidence: 99%

Pollen–ovule ratios are strongly correlated with floral reciprocity, in addition to sexual system, in Mussaenda (Rubiaceae)

Yuan

Shi

Deng

et al. 2017

Nordic Journal of Botany

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“…Anchusa L., Nivenia Vent., Lithodora Griseb., Linum L., Narcissus L., Quinchamalium Molina, and Nymphoides Ség. ; Darwin, ; Riveros, Arroyo & Humaña, ; Thompson, ; Ferrero et al ., ; Sánchez et al ., ; Haddadchi, ; Santos‐Gally, Gonzalez‐Voyer & Arroyo, ), providing new plant groups for testing these predictions. Also, some studies have examined the predicted critical role of pollinators in maintaining higher levels of dissasortative mating than assortative mating (Stone & Thomson, ; Cesaro & Thompson, ; Pérez‐Barrales & Arroyo, ; Simón‐Porcar, Santos‐Gally & Arroyo, ).…”

Section: Introductionmentioning

confidence: 99%

Stylar polymorphism on the edge: unusual flower traits in MoroccanNarcissus broussonetii(Amaryllidaceae)

2015

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Heterostyly and related polymorphisms (e.g. stigma-height dimorphism) have been used as model systems for studying the origin and maintenance of plant population variability. Stigma-height dimorphism frequently occurs in Narcissus and is associated with a particular flower shape. In the present study, we describe a new, peculiar case of stigma-height dimorphism in Narcissus broussonetii, a species on the margin of the geographical distribution of the genus. We determined the stylar condition of N. broussonetii and its variation across populations, analyzed perianth morphology and its relationship with stylar variation, and compared this species with other stylar dimorphic species of the genus. We also studied the incompatibility system and pollination ecology of the species. Narcissus broussonetii is a style-dimorphic species, as suggested in early studies that were subsequently neglected, and displays unusual flower morphology, with a long floral tube and a virtual absence of a corona. The species shows a late-(ovarian) acting incompatibility system and crosses within and between morphs are fertile. We observed short-tongued diurnal and long-tongued nocturnal pollinators. Our findings confirm that the presence of the observed dimorphism across populations is most probably the result of the joint action of a nonheteromorphic incompatibility system, extremely long and narrow floral tubes, and a combined role of short-and long-tongued pollinators.

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“…To estimate the relative frequencies of the two style morphs in population of F. dibotrys, five 2 × 2 m sampling areas for each morph were selected for the larger populations (≥100 m 2 ), and all plants were recorded in much smaller population. Morph frequencies in each population were tested against the expected equilibrium (isoplethy: both morphs in equal frequencies) typical for distylous species, using a goodness of fit G test (Haddadchi 2013).…”

Section: Methodsmentioning

confidence: 99%

“…We reasoned that greater stigma-anther separation may result in greater interference between pollen removal and deposition, and thus result in avoidance of inbreeding. Frequencies of flower morphs have been studied in great detail (Endels et al 2002, Haddadchi 2013, especially with respect to its influence on pollination (Ågren 1996) and inbreeding (Goodwillie 2000). In most distylous species populations, large populations always exhibit 1 : 1 morph ratios or a slight L-bias (Chen 2012).…”

Section: Fig 2 Relative Reciprocity Ratio Of the Long And Short Orgmentioning

confidence: 99%

The breeding system and reproductive ecology of the endangered plant Fagopyrum dibotrys (D. Don) Hara

et al. 2015

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Distyly has been confirmed in Fagopyrum dibotrys (D. Don) Hara. The species are dimorphic in style length, anther height, pollen size and number but not in flower diameter, pollen surface ornamentation and stigma papilla cells. In F. dibotrys populations, style-morph ratios vary from isoplethy (1L : 1S) to strongly L-biased, or they more often contain only the L-morph. Moreover, it was found that larger isoplethic populations of F. dibotrys could produce more seeds than smaller single-morph populations. F. dibotrys had a smaller population size, morph-biased populations, and lower seed setting, which could be the reasons for the decrease in its population DOI: http://dx.doi.org/10.3329/bjb.v43i2.21673 Bangladesh J. Bot. 43(2): 197-205, 2014 (September)

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Stylar polymorphism, reciprocity and incompatibility systems in Nymphoides montana (Menyanthaceae) endemic to southeastern Australia

Cited by 15 publications

References 51 publications

Pollen–ovule ratios are strongly correlated with floral reciprocity, in addition to sexual system, in Mussaenda (Rubiaceae)

Pollen–ovule ratios are strongly correlated with floral reciprocity, in addition to sexual system, in Mussaenda (Rubiaceae)

Stylar polymorphism on the edge: unusual flower traits in MoroccanNarcissus broussonetii(Amaryllidaceae)

The breeding system and reproductive ecology of the endangered plant Fagopyrum dibotrys (D. Don) Hara

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