Relevant bibliographies by topics / Chiloglottis

Academic literature on the topic 'Chiloglottis'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Chiloglottis"

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Bower, Colin C., and Graham R. Brown. "Pollinator specificity, cryptic species and geographical patterns in pollinator responses to sexually deceptive orchids in the genus Chiloglottis: the Chiloglottis gunnii complex." Australian Journal of Botany 57, no. 1 (2009): 37. http://dx.doi.org/10.1071/bt08164.

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Australian sexually deceptive orchids are typically highly pollinator specific, each species having a single unique hymenopteran pollinator species. Pollinator specificity in six of the nine described species in the Chiloglottis gunnii Lindl. complex was investigated by using field pollinator-choice tests, with Chiloglottis taxa translocated within and among biogeographical regions. Specific pollinators revealed the existence of five undescribed cryptic taxa in the C. gunnii complex, three within C. pluricallata D.L.Jones and two within C. valida D.L.Jones, in addition to the six described species. Of the 11 Chiloglottis taxa, 10 had a single thynnine-wasp pollinator throughout their sometimes large distributions, whereas one, C. valida, had a second pollinator in parts of its distribution. Eleven pollinators belonged to the genus Neozeleboria and one to Eirone. Pollinator-choice testing showed that cross-attraction of pollinators occurs between three geographically isolated Chiloglottis taxa on the New South Wales (NSW) New England Tableland and taxa in the South Eastern Highlands of NSW and Victoria. The data suggested there is sharing of chemical attractants and supported the recognition of at least five odour types within Chiloglottis, each encompassing one to three orchid taxa and their pollinators. The following two broad generalisations are made: (1) there is no cross-attraction of pollinators among sympatric Chiloglottis species, i.e. sympatric orchid taxa do not share attractant odours; and (2) all Chiloglottis species have different specific pollinators, although they may share attractant odours allopatrically. Some 28 thynnine-wasp species were attracted as minor non-pollinating responders to Chiloglottis taxa; five of these were pollinators of other Chiloglottis species. These wasps were much more taxonomically diverse than the pollinators, belonging to six genera, and suggest that some orchid-odour components are widely shared within the sex pheromones of the Thynninae.
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Bower, CC. "Demonstration of Pollinator-Mediated Reproductive Isolation in Sexually Deceptive Species of Chiloglottis (Orchidaceae: Caladeniinae)." Australian Journal of Botany 44, no. 1 (1996): 15. http://dx.doi.org/10.1071/bt9960015.

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Three designs of field choice experiments were used to demonstrate complete reproductive isolation by sexually deceived thynnine pollinators (Neozeleboria Rohwer spp.) in eight species of Chiloglottis R.Br. Four species, Chiloglottis diphylla R.Br., C. formicifera Fitzg., C. pluricallata D.L.Jones and C. valida D.L.Jones, attracted only one wasp species, but the other four, C. platyptera D.L.Jones, C. seminuda D.L.Jones, C. trilabra Fitzg. and C. reflexa Labill. Druce exhibited multiple species attraction. Wasps visiting orchids were classified as major responders if they exhibited behaviour which could potentially result in pollination, by contrast to minor responders which did not. Major responders occurring sympatrically with the orchid were termed confirmed, potential or putative pollinators on the basis of observation of pollinia removal or deposition, pseudocopulation with the labellum, or arrival at bait flowers with pollinia from local orchid populations, respectively. Each Chiloglottis species had a single Neozeleboria species as confirmed or potential pollinator. The data confirmed that field pollinator choice tests can be used to distinguish cryptic sexually deceptive orchid species, and that specific pollinators may be used reliably as taxonomic characters in Chiloglottis.
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Mant, J., R. Peakall, and P. H. Weston. "Specific pollinator attraction and the diversification of sexually deceptive Chiloglottis (Orchidaceae)." Plant Systematics and Evolution 253, no. 1-4 (June 2005): 185–200. http://dx.doi.org/10.1007/s00606-005-0308-6.

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FLANAGAN, NICOLA S., DANIEL EBERT, CAROLYN PORTER, MAURIZIO ROSSETTO, and ROD PEAKALL. "Microsatellite markers for evolutionary studies in the sexually deceptive orchid genus Chiloglottis." Molecular Ecology Notes 6, no. 1 (March 2006): 123–26. http://dx.doi.org/10.1111/j.1471-8286.2005.01161.x.

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MANT, J., C. C. BOWER, P. H. WESTON, and R. PEAKALL. "Phylogeography of pollinator-specific sexually deceptive Chiloglottis taxa (Orchidaceae): evidence for sympatric divergence?" Molecular Ecology 14, no. 10 (September 2005): 3067–76. http://dx.doi.org/10.1111/j.1365-294x.2005.02659.x.

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6

Peakall, Rod, C. C. Bower, A. E. Logan, and H. I. Nicol. "Confirmation of the Hybrid Origin of Chiloglottis × pescottiana (Orchidaceae: Diurideae). I. Genetic and Morphometric Evidence." Australian Journal of Botany 45, no. 5 (1997): 839. http://dx.doi.org/10.1071/bt96081.

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Pollination by sexual deception in orchids is characterised by a high degree of pollinator specificity, which may account for the rarity of natural hybrids within the group. Only one such hybrid has been formally recognised in Australia, Chiloglottis × pescottiana R.S.Rogers, which has intermediate floral morphology between its putative parents, C. valida D.L.Jones and C. trapeziformis Fitzg. In this paper, genetic and morphometric analyses confirm the hybrid origin of this taxon. Allozyme analysis of C. trapeziformis and C. valida revealed fixed allelic differences at four ‘diagnostic’ loci and significant frequency differences at three other loci. In all cases, C. × pescottiana exhibited fixed heterozygosity at the diagnostic loci. Multidimensional scaling of both the genetic data and seven morphometric traits revealed distinct clusters of C. trapeziformis and C. valida while C. × pescottiana formed an intermediate cluster between the two parents. To test for genetic compatibility between C. trapeziformis, C. valida and C. × pescottiana, a series of reciprocal artificial crosses were performed. In all cases, the percentage of capsules formed was at least as great for between-species crosses as for within-species selfs and crosses (range 75–100%). No significant differences in the percentage of seed with normal embryos was detected between self- and cross-pollinations within C. trapeziformis (range 77–81%), C. valida (range 59–74%) and C. × pescottiana (range 30–51%), but the percentage of normal embryos was notably lower in C. × pescottiana. The cross C. trapeziformis female by C. valida male produced significantly more normal embryos (90%) compared with the reverse cross (46%). Artificial backcrosses of C. × pescottiana to C. valida and C. trapeziformis had lower percentages of normal embryos when C. × pescottiana was the pollen donor (39–43%) rather than recipient (62–68%), suggesting reduced pollen viability in the latter taxon. The size of F2 embryos in C. × pescottiana seed capsules was smaller than the embryos of both C. valida and C. trapeziformis. Despite confirmation of hybridisation, little evidence for backcrossing was found. Thus, while the specific pollinator relationships may occasionally break down in these sexually deceptive orchids, reduced viability of hybrid pollen and F2 seed, and inefficient pollination of the hybrid, may minimise introgression. It is concluded from the available evidence that hybridisation has not been a major evolutionary factor in the diversification of sexual deception worldwide.
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Peakall, Rod, Lauren Jones, Colin C. Bower, and Brendan G. Mackey. "Bioclimatic assessment of the geographic and climatic limits to hybridisation in a sexually deceptive orchid system." Australian Journal of Botany 50, no. 1 (2002): 21. http://dx.doi.org/10.1071/bt01021.

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Australia is a major centre of diversity for pollination by sexual deception, a pollination syndrome unique to orchids and characterised by highly specific pollinator relationships. Chiloglottis pescottiana is a rare natural hybrid between sexually deceptive C. trapeziformis and C. valida. We utilised bioclimatic models to predict the potential range of the parental orchid species, the hybrid and their pollinators. The predicted ranges of the parental orchid species rarely overlapped (only 2% of the core range), with the geographic separation of the species reflecting the occupation of largely distinct climatic niches and limiting opportunities for hybridisation. Comparison of the predictions with independent distributions of the orchid taxa revealed a close match. Unexpectedly, our results revealed that several related and morphologically similar orchid species are, nevertheless, ecologically distinct from C. valida. Our study demonstrates that bioclimatic modelling provides an additional tool for exploring a range of ecological and evolutionary questions.
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Wong, Darren C. J., Ranamalie Amarasinghe, Vasiliki Falara, Eran Pichersky, and Rod Peakall. "Duplication and selection in β-ketoacyl-ACP synthase gene lineages in the sexually deceptive Chiloglottis (Orchidaceace)." Annals of Botany 123, no. 6 (February 21, 2019): 1053–66. http://dx.doi.org/10.1093/aob/mcz013.

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Miller, Joseph T., and Mark A. Clements. "Molecular phylogenetic analyses of Drakaeinae: Diurideae (Orchidaceae) based on DNA sequences of the internal transcribed spacer region." Australian Systematic Botany 27, no. 1 (2014): 3. http://dx.doi.org/10.1071/sb13036.

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Results of the analysis of rDNA sequences based on 55 collections representative of 32 Drakaeinae orchid species and outgroups supported the monophyly of the subtribe, with weak support for the inclusion of Spiculaea, and revealed six strongly supported monophyletic, well defined morphological groups. Caleana is monophyletic. Chiloglottis s.lat. is monophyletic when Simpliglottis and Myrmechila are included. Our results also suggested that the segregate genus Phoringopsis is better treated as part of Arthrochilus.There is sufficient molecular and morphological support for recognition of the leafless, mycroheterotrophic Thynninorchis to be maintained as a separate genus. A taxonomic summary is provided, including reassignment of taxa at generic ranks and new combinations for Caleana alcockii (Hopper & A.P.Br.) M.A.Clem., Caleana brockmanii (Hopper & A.P.Br.) M.A.Clem., Caleana disjuncta (D.L.Jones) M.A.Clem., Caleana dixonii (Hopper & A.P.Br.) M.A.Clem., Caleana gracilicordata (Hopper & A.P.Br.) M.A.Clem., Caleana granitica (Hopper & A.P.Br.) M.A.Clem., Caleana hortiorum (Hopper & A.P.Br.) M.A.Clem., Caleana lyonsii (Hopper & A.P.Br.) M.A.Clem., Caleana parvula (Hopper & A.P.Br.) M.A.Clem., Caleana terminalis (Hopper & A.P.Br.) M.A.Clem. and Caleana triens (Hopper & A.P.Br.) M.A.Clem.
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Peakall, Rod, Daniel Ebert, Jacqueline Poldy, Russell A. Barrow, Wittko Francke, Colin C. Bower, and Florian P. Schiestl. "Pollinator specificity, floral odour chemistry and the phylogeny of Australian sexually deceptive Chiloglottis orchids: implications for pollinator-driven speciation." New Phytologist 188, no. 2 (June 7, 2010): 437–50. http://dx.doi.org/10.1111/j.1469-8137.2010.03308.x.

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Dissertations / Theses on the topic "Chiloglottis"

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Mant, Jim. "The comparative biology of Chiloglottis and its thynnine wasp pollinators." Phd thesis, 2002. http://hdl.handle.net/1885/151489.

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Poldy, Jacqueline. "Synthetic and ecological chemistry of natural products and analogues from sexually deceptive Chiloglottis orchids." Phd thesis, 2011. http://hdl.handle.net/1885/150809.

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The work detailed in this thesis had its genesis in collaborative research efforts directed at understanding the ecological constraints on the evolution and speciation of sexually deceptive Chiloglottis orchids. Pollination by deception is a well documented phenomenon, particularly in the Orchidaceae, however only in recent decades has the chemical mimicry that so often drives these pollination syndromes become the subject of enquiry. This report commences with an outline of chemical mimicry and insect olfactory perception. Chapter 1 describes the conditions for pollination by food fraud and reproductive deception, with reference to insect pheromone systems, including their biological and behavioural functions, and chemical properties. Sexual deception, with a focus on the Australian genera, is given particular emphasis. A number of synthetic routes for the construction of 2,5-dialk(en)yl-1,3-cyclohexanediones, which represent insect sex attractants are reported in Chapters 2 and 3. Chiloglottones are natural products that operate both as female sex pheromones in thynnine wasp species as well as deceptive allomones in Chiloglottis orchids. We developed and utilised two alternative approaches to successfully make a diverse array of chiloglottone analogues (Chapter 2). These routes have been disclosed in publications as indicated in the Author's Declaration (page ii). Chapter 3 reports a case study of mimetic chemistry of the sexually deceptive orchid C. turfosa, which presented diverse synthetic challenges that required the design of new approaches towards the target 2,5-dialkyl-1,3-cyclohexanediones. Chapter 4 considers the interpretation of mass spectral data via high resolution analysis of synthetic 2,5-dialkyl-1,3-cyclohexanediones. This work, which was generated in cooperation with collaborators in Germany and has been reported in Proceedings of the National Academy of Sciences (see page ii), enables the rapid identification of likely structures from the mass spectra of new natural products that contain the 2,5-dialkyl-1,3-cyclohexanedione skeleton. This Chapter also describes our efforts to divulge the biosynthetic origin of chiloglottones in sexually deceptive Chiloglottis orchids. We discuss our journey towards revealing the circumstances required for in vivo chiloglottone biosynthesis, from the preparation of stable isotope labelled precursors, to manipulation of conditions for biosynthesis. The ecological conclusions that were revealed through our appreciation of the chiloglottones from some 20 Chiloglottis orchid species are described in Chapter 5. This includes the discovery of further natural products and the analytical and field evaluation of synthetic material. The relationship between orchid chemistry and phylogeny suggests that pollinator driven selection is a probable means of speciation in this taxon.
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Whitehead, Michael Robert. "The evolutionary biology of pollination: studies in a genus of australian sexually deceptive orchids." Phd thesis, 2012. http://hdl.handle.net/1885/10260.

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There are few other structures in nature from which evolution has generated such wide diversity as the flower or inflorescence, and this diversity is commonly attributed to the influence of their animal visitors. By outsourcing their mate choice to pollinators, plants have left themselves - and especially their flowers - subject to the selective forces imposed by the behaviour, cognition and perception of the pollinators that serve them. The orchids provide some of the most remarkable and extreme examples of adaptations to specific animal pollinators. Perhaps one of the most peculiar of these strategies is sexual deception, whereby male insects are lured to the flower by mimicry of the female sex pheromone. This seemingly unlikely strategy has evolved multiple times independently on different continents in different parts of the orchid phylogeny which raises the question of what adaptive advantages might underlie such a strategy. This multidisciplinary thesis studies gene flow and pollinator behaviour in two sympatric sexually deceptive orchids in the genus Chiloglottis. The two species attract their specific wasp pollinators through emission of distinct species - specific semiochemicals. Since floral volatiles play a pre-eminent role in pollinator attraction, Chiloglottis provides an excellent case study for examining the interaction between floral volatile chemistry, pollinator behaviour and the evolutionary dynamics of populations. The thesis begins with a review of floral volatiles and their role in pollinator attraction and plant speciation. The literature is used to develop a research framework of six testable hypotheses under which we might productively explore the influence of floral volatiles on plant evolution. These hypotheses are then explored in the study system over the following chapters. A study of pollinator specificity, neutral genetic differentiation and floral chemistry demonstrates that the chemical mimicry crucial to sexual deception is responsible for reproductive isolation and potentially even speciation. Mating system and paternity analysis provide the first genetic evidence for multiple paternity in orchid broods. Extensive outcrossing is found to predominate and paternity assignment shows evidence for long distance pollen flow supporting the hypothesis that sexual deception promotes outcrossing and so minimizes the potentially deleterious effects of selfing. Lastly, an innovative new method is developed for tracking wasps in the field. Application of this technique to a population of orchid-pollinating wasps reveals detailed information about their movement and mating behaviour. The findings support the conclusion that sexual deception is a superb adaptive solution to the problem flowers face of simultaneously attracting pollinators and persuading them to leave quickly.
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Book chapters on the topic "Chiloglottis"

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N., Kamaladhasan, Mohan Raj R., Krishnankutty N., Indhar Saidanyan R., Soundararajan N., Saravanan S., Anbarasan M. R., and Chandrasekaran S. "Evolution of Organismal Female Wasp Mimics in Sexually Deceptive Orchid Genus Chiloglottis (Orchidaceae)." In Orchid Biology: Recent Trends & Challenges, 385–99. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-32-9456-1_19.

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