The Floral Biology of Cassia didymobotrya and C. auriculata (Caesalpiniaceae)

Dulberger, Rivka

doi:10.2307/2442734

Cited by 48 publications

(69 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This kind of floral morphology can thus limit the spectrum of visitors able to forage on flowers and may work as a strategy for effective pollination. Pollen deposition on different areas of the pollinator's body in the studied Senna and Swartzia species is a result of heteranthery, an attribute already recorded for other Swartzia species (Lopes & Machado 1996;Moço & Pinheiro 1999), in various genera of the tribe Cassiinae (Dulberger 1981;Gottsberger & Silberbauer-Gottsberger 1988;Westerkamp 2004) and in at least 20 families (Endress 1994;Vallejo-Marín et al 2010). Heteranthery, resulting in functional separation of pollen for feeding and pollen for pollination, has been considered an evolutionary response to assure pollination while feeding voracious foraging bees (Vogel 1978;Buchmann 1983;Luo et al 2008;Vallejo-Marín et al 2009;Papaj et al 2017).…”

Section: Floral Phenology Morphology and Biologysupporting

confidence: 64%

“…The medium to large-sized bees observed in this study have been reported as pollinators of several other legume species with medium and large-sized flowers: Euglossina species are the main pollinators of Swartzia pickelli (Lopes & Machado 1996), and Xylocopa and Centridini bees of Swartzia apetala (Moço & Pinheiro 1999) and of several Senna species (Carvalho & Oliveira 2003), as well as several Cassiinae species with pollen flowers (Dulberger 1981;Gottsberger & Silberbauer-Gottsberger 1988). These cohorts of buzz-collectors have also been reported as pollinators of several Caesalpinioideae with nectar flowers (Cocucci et al 1992;Lewis & Gibbs 1999), and most of them are important pollinators of many canopy tree species of Neotropical forests Bawa 1985a;1990).…”

Section: Floral Visitorssupporting

confidence: 52%

“…This arrangement allows free access of the pollinator to the feeding anthers and may protect the style and stigma from possible damage during vibration by the heavy-bodied visitor (Dulberger 1981). Furthermore, in these species the gynoecium greatly exceeds the size of the largest bees; thus, the pollination may depend on incidental contact with the stigma and the bee's body.…”

Section: Floral Phenology Morphology and Biologymentioning

confidence: 99%

“…In other words, geitonogamy is not a possibility in this species. The correlated evolution of monomorphic enantiostyly and a self-incompatible system in these plants points to the possibility of other evolutionary causes for style deflection in both directions in the same individual as the reduction of pollen interference and the reaching of pollen safety sites in the bee's body (Dulberger 1981;Westerkamp 2004;Koch et al 2017).…”

Section: Floral Phenology Morphology and Biologymentioning

confidence: 99%

See 3 more Smart Citations

Pollination biology of melittophilous legume tree species in the Atlantic Forest in Southeast Brazil

2018

View full text Add to dashboard Cite

This study describes the floral phenology and morphology, reproductive biology and pollinators for eight legume tree species, Schizolobium parahyba, Senna macranthera, and Senna multijuga (Caesalpinioideae), as well as Andira fraxinifolia, Lonchocarpus cultratus, Pterocarpus violaceus, Swartzia oblata, and S. simplex (Papilionoideae), in the Atlantic Forest in Southeast Brazil. All the studied species showed an annual flowering pattern, and almost all are of the cornucopia-flowering type, with the only exception being Swartzia oblata, which was of the steady-state type. In general, the legume flowers studied are conspicuous, mostly medium-sized, and offer nectar and/or pollen as a resource. Self-incompatibility associated with the production of many flowers and consequent pollen discounting due to self-pollination may contribute to low fruit set of these species in natural conditions. Fifty bee species were recorded visiting the flowers, with medium to large-sized Apidae bees, such as Bombus morio, and species of Xylocopa, Centridini and Euglossina, which were among the most frequent visitors and major pollinators. These bees showed high floral constancy, thus they are significant to the reproductive success of these tree species. This study provides information regarding the interactions between bees and these eight legume species and evaluates the importance of pollinators for their sexual reproduction.

show abstract

Section: Floral Phenology Morphology and Biologysupporting

confidence: 64%

Section: Floral Visitorssupporting

confidence: 52%

Section: Floral Phenology Morphology and Biologymentioning

confidence: 99%

Section: Floral Phenology Morphology and Biologymentioning

confidence: 99%

See 2 more Smart Citations

Pollination biology of melittophilous legume tree species in the Atlantic Forest in Southeast Brazil

2018

View full text Add to dashboard Cite

show abstract

“…The female sex organ (style) is deflected to the left (left styled) or to the right (right styled) of the floral axis and a reciprocally positioned pollinating anther is commonly located on the opposite side of the flower to the deflected style. This arrangement results in 'mirror-image flowers' and these have been known for over a century although their evolution and functional significance is still poorly understood (Todd 1882;Knuth 1906;Ornduff & Dulberger 1978;Dulberger 1981;Fenster 1995;Jesson & Barrett 2002a). Left-and right-styled flowers can occur on the same individual or on separate individuals, and these two conditions are referred to as 'monomorphic' and 'dimorphic' enantiostyly, respectively, with individual species exhibiting a single condition only (Barrett et al 2000).…”

Section: Introductionmentioning

confidence: 99%

The genetics of mirror-image flowers

Jesson

Barrett

2002

Proc. R. Soc. Lond. B

View full text Add to dashboard Cite

Conspicuous asymmetries in forms that are polymorphic within a species can be genetically or environmentally determined. Here, we present a genetic analysis of the inheritance of dimorphic enantiostyly, a sexual polymorphism in which all flowers on a plant have styles that are consistently deflected either to the left or the right side of the floral axis. Using Heteranthera multiflora (Pontederiaceae), a short-lived herb, we conducted crosses within and between left-and right-styled plants and scored progeny ratios of the style morphs in F 1 , F 2 and F 3 generations. Crosses conducted in the parental generation between morphs or right-styled plants resulted in right-styled progeny, whereas crosses between left-styled plants resulted in left-styled progeny. When putative heterozygous F 1 plants were selfed, the resulting F 2 segregation ratios were not significantly different from a 3 : 1 ratio for right-and left-styled plants. Crosses between left-and right-styled plants in the F 2 generation yielded F 3 progeny with either a 1 : 1 ratio of left-and right-styled plants or right-styled progeny. Our results are consistent with a model in which a single Mendelian locus with two alleles, with the right-styled allele (R) dominant to the left-styled allele (r), governs stylar deflection. The simple inheritance of dimorphic enantiostyly has implications for the evolution and maintenance of this unusual sexual polymorphism.

show abstract

Heteranthery in Clarkia: pollen performance of dimorphic anthers contradicts expectations

Peach

Mazer

2019

American J of Botany

View full text Add to dashboard Cite

PREMISE OF THE STUDY:Wild plant species that require the services of pollen-feeding insects for reliable pollination may evolve features that attract and reward their mutualistic partners. Heterantherous species have been proposed to exhibit a "division of labor" whereby "feeding anthers" (which produce pollen that may be consumed by an insect) are distinguished from "reproductive anthers" (which produce pollen more likely to contribute to reproduction). In some heterantherous species, including Clarkia unguiculata (Onagraceae), these two anther types differ with respect to stamen length, anther size, pollen production, and pollen color. METHODS:The primary goal of this study was to test one component of the "division of labor" hypothesis by comparing the performance of the pollen produced by each type of anther in C. unguiculata. To achieve this goal, under greenhouse conditions, we hand pollinated and assessed pollen performance (using epifluorescence microscopy) within ~228 flowers.KEY RESULTS: The pollen produced by the two anther types differed significantly with respect to both stigma and style penetration. The inner series of anthers produce pollen with higher performance than the outer series of longer, dark red anthers. CONCLUSIONS: These findings contradict previous descriptions of the genus, reporting that the inner diminutive series of anthers in Clarkia produce "abortive and nonfunctional" pollen. We outline the future research required to demonstrate the ecological function of heteranthery in this iconic wildflower group.

show abstract

The Floral Biology of Cassia didymobotrya and C. auriculata (Caesalpiniaceae)

Cited by 48 publications

References 0 publications

Pollination biology of melittophilous legume tree species in the Atlantic Forest in Southeast Brazil

Pollination biology of melittophilous legume tree species in the Atlantic Forest in Southeast Brazil

The genetics of mirror-image flowers

Heteranthery in Clarkia: pollen performance of dimorphic anthers contradicts expectations

Contact Info

Product

Resources

About