Metschnikowia hamakuensis sp. nov., Metschnikowia kamakouana sp. nov. and Metschnikowia mauinuiana sp. nov., three endemic yeasts from Hawaiian nitidulid beetles

Lachance, Marc‐André; Ewing, Curtis P.; Bowles, Jane M.; Starmer, William T.

doi:10.1099/ijs.0.63615-0

Cited by 61 publications

(37 citation statements)

References 15 publications

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“…The large-spored Metschnikowia clade comprises two subclades, one of which has a strictly Hawaiian distribution (Lachance et al 2005). Like M. lochheadii, the yeasts discussed in this paper are members of the other subclade, which contains species that have been isolated primarily in the New World (FidaldoJiménez et al 2008) and consequently have a broader geographic range and are exposed to greater seasonal climatic fluctuations.…”

Section: Introductionmentioning

confidence: 90%

Population structure of two beetle-associated yeasts: comparison of a New World asexual and an endemic Nearctic sexual species in the Metschnikowia clade

Wardlaw

Berkers

Man

et al. 2009

Antonie van Leeuwenhoek

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The genetic structure of two related yeast species, one sexual and one asexual, was compared using polymorphic DNA markers. Although both yeasts propagate by asexual budding of haploid cells, Metschnikowia borealis reproduces sexually when compatible strains come in contact. To what extent this has occurred in nature was not known. As Candida ipomoeae is a closely related, asexual species, the two yeasts provide an excellent model system to assess the role of sexual reproduction in a biogeographic context. Natural isolates of the two species were characterized using several polymorphic DNA markers. As predicted for an organism whose reproduction is strictly clonal, C. ipomoeae exhibited low haplotype diversity, high linkage disequilibrium, and high population differentiation. In contrast, M. borealis had unique haplotypes in most isolates, lower population differentiation, and little linkage disequilibrium, demonstrating that sexual recombination is prevalent. Geographic gradients were identified in both species, indicating that historical and climatic factors both play a role in shaping the populations. The spatial structure is also thought to be influenced by the ecology of the small floricolous beetles (family Nitidulidae) that vector the yeasts. For example, Hawaiian strains of C. ipomoeae show evidence of having undergone a genetic bottleneck, most likely when the vector was introduced to the islands. The two haplotypes found in Hawaii were nearly identical and were also found in North and Central America. M. borealis had a more continuous distribution where the genetic markers follow latitudinal and longitudinal gradients.

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Section: Introductionmentioning

confidence: 90%

Population structure of two beetle-associated yeasts: comparison of a New World asexual and an endemic Nearctic sexual species in the Metschnikowia clade

Wardlaw

Berkers

Man

et al. 2009

Antonie van Leeuwenhoek

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“…Some of the close relatives of the wasp symbiont are also insect associates (9). However, the phenotypes of these fungi in their beetle hosts are unknown (14). The fungus most closely related to C. merceti's symbiont is a fungal symbiont of the host cockroaches (9).…”

Section: Discussionmentioning

confidence: 99%

Negative Fitness Consequences and Transmission Dynamics of a Heritable Fungal Symbiont of a Parasitic Wasp

Gibson

Hunter

2009

Appl Environ Microbiol

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Heritable bacterial symbionts are widespread in insects and can have many important effects on host ecology and fitness. Fungal symbionts are also important in shaping their hosts' behavior, interactions, and evolution, but they have been largely overlooked. Experimental tests to determine the relevance of fungal symbionts to their insect hosts are currently extremely rare, and to our knowledge, there have been no such tests for strictly predacious insects. We investigated the fitness consequences for a parasitic wasp (Comperia merceti) of an inherited fungal symbiont in the Saccharomycotina (Ascomycota) that was long presumed to be a mutualist. In comparisons of wasp lines with and without this symbiont, we found no evidence of mutualism. Instead, there were significant fitness costs to the wasps in the presence of the yeast; infected wasps attacked fewer hosts and had longer development times. We also examined the relative competitive abilities of the larval progeny of infected and uninfected mothers, as well as horizontal transmission of the fungal symbiont among larval wasps that shared a single host cockroach egg case. We found no difference in larval competitive ability when larvae whose infection status differed shared a single host. We did find high rates of horizontal transmission of the fungus, and we suggest that this transmission is likely responsible for the maintenance of this infection in wasp populations.

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“…A yeast-insect co-speciation within the LSM clade and relatives has been suggested (Lachance et al, 2005). An Early Cretaceous (129.7 Ma, CI 117.3-142.0; Hunt et al, 2007) origin of the nitidulid beetles (subfam.…”

Section: Habitat Shifts and Diversificationmentioning

confidence: 99%

“…Lachance, 2011b;Lachance et al, 1998a) (Table 1). Others are confined to small areas, as for example four endemic species that are found only in the Hawaiian Islands (Lachance et al, 2005;Lachance et al, 1990) and one that seems to be restricted to the Cerrado ecosystem of the Jalapão area in Brazil (Rosa et al, 2007). Some species are versatile and able to tolerate many different environments, whereas others are highly specialized and can only survive in certain specific natural habitats, including extreme environments (Table 1).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic analysis of the angiosperm-floricolous insect–yeast association: Have yeast and angiosperm lineages co-diversified?

Guzmán

Lachance

Herrera

2013

Molecular Phylogenetics and Evolution

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a b s t r a c tMetschnikowia (Saccharomycetales, Metschnikowiaceae/ Metschnikowia clade) is an ascomycetous yeast genus whose species are associated mostly with angiosperms and their insect pollinators over all continents. The wide distribution of the genus, its association with angiosperm flowers, and the fact that it includes some of the best-studied yeasts in terms of biogeography and ecology makeMetschnikowia an excellent group to investigate a possible co-radiation with angiosperm lineages. We performed phylogenetic analyses implementing Bayesian inference and likelihood methods, using a concatenated matrix (%2.6 Kbp) of nuclear DNA ( ACT1, 1st and 2nd codon positions of EF2, Mcm7, and RPB2) sequences. We included 77 species representing approximately 90% of the species in the family. Bayesian and parsimony methods were used to perform ancestral character reconstructions within Metschnikowia in three key morphological characters. Patterns of evolution of yeast habitats and divergence times were explored in the Metschnikowia clade lineages with the purpose of inferring the time of origin of angiosperm-associated habitats within Metschnikowiaceae. This paper presents the first phylogenetic hypothesis to include nearly all known species in the family. The polyphyletic nature of Clavispora was confirmed and Metschnikowia species (and their anamorphs) were shown to form two groups: one that includes mostly floricolous, insect-associated species distributed in mostly tropical areas (the large-spored Metschnikowia clade and relatives) and another that comprises more heterogeneous species in terms of habitat and geographical distribution. Reconstruction of character evolution suggests that sexual characters (ascospore length, number of ascospores, and ascus formation) evolved multiple times within Metschnikowia. Complex and dynamic habitat transitions seem to have punctuated the course of evolution of the Metschnikowiaceae with repeated and independent origins of angiosperm-associated habitats. The origin of the family is placed in the Late Cretaceous (71.7 Ma) with most extant species arising from the Early Eocene. Therefore, the Metschnikowiaceae likely radiated long after the Mid-Cretaceous radiations of angiosperms and their diversification seems to be driven by repeated radiation on a pre-existing diverse resource.

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Metschnikowia hamakuensis sp. nov., Metschnikowia kamakouana sp. nov. and Metschnikowia mauinuiana sp. nov., three endemic yeasts from Hawaiian nitidulid beetles

Cited by 61 publications

References 15 publications

Population structure of two beetle-associated yeasts: comparison of a New World asexual and an endemic Nearctic sexual species in the Metschnikowia clade

Population structure of two beetle-associated yeasts: comparison of a New World asexual and an endemic Nearctic sexual species in the Metschnikowia clade

Negative Fitness Consequences and Transmission Dynamics of a Heritable Fungal Symbiont of a Parasitic Wasp

Phylogenetic analysis of the angiosperm-floricolous insect–yeast association: Have yeast and angiosperm lineages co-diversified?

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