Abstract:
:Lady's slipper orchids (Cypripedium spp.) are rare terrestrial plants that grow throughout the temperate Northern Hemisphere. Like all orchids, they require mycorrhizal fungi for germination and seedling nutrition. The nutritional relationships of adult Cypripedium mycorrhizae are unclear; however, Cypripedium distribution may be limited by mycorrhizal specificity, whether this specificity occurs only during the seedling stage or carries on into adulthood. We attempted to identify the primary mycorrhizal symbionts for 100 Cypripedium plants, and successfully did so with two Cypripedium calceolus, 10 Cypripedium californicum, six Cypripedium candidum, 16 Cypripedium fasciculatum, two Cypripedium guttatum, 12 Cypripedium montanum, and 11 Cypripedium parviflorum plants from a total of 44 populations in Europe and North America, yielding fungal nuclear large subunit and mitochondrial large subunit sequence and RFLP (restriction fragment length polymorphism) data for 59 plants. Because orchid mycorrhizal fungi are typically observed without fruiting structures, we assessed fungal identity through direct PCR (polymerase chain reaction) amplification of fungal genes from mycorrhizally colonized root tissue. Phylogenetic analysis revealed that the great majority of Cypripedium mycorrhizal fungi are members of narrow clades within the fungal family Tulasnellaceae. Rarely occurring root endophytes include members of the Sebacinaceae, Ceratobasidiaceae, and the ascomycetous genus, Phialophora. C. californicum was the only orchid species with apparently low specificity, as it associated with tulasnelloid, ceratobasidioid, and sebacinoid fungi in roughly equal proportion. Our results add support to the growing literature showing that high specificity is not limited to nonphotosynthetic plants, but also occurs in photosynthetic ones.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Shefferson RP,Weiss M,Kull T,Taylor DLdoi
10.1111/j.1365-294X.2005.02424.xsubject
Has Abstractpub_date
2005-02-01 00:00:00pages
613-26issue
2eissn
0962-1083issn
1365-294Xpii
MEC2424journal_volume
14pub_type
杂志文章abstract::Permafrost represents an important understudied genetic resource. Soil microorganisms play important roles in regulating biogeochemical cycles and maintaining ecosystem function. However, our knowledge of patterns and drivers of permafrost microbial communities is limited over broad geographic scales. Using high-throu...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14396
更新日期:2017-12-01 00:00:00
abstract::A breakdown of self-incompatibility (SI) followed by a shift to selfing is commonly observed in the evolution of flowering plants. Both are expected to reduce the levels of heterozygosity and genetic diversity. However, breakdown of SI should most strongly affect the region of the SI locus (S-locus) because of the rel...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2011.05435.x
更新日期:2012-03-01 00:00:00
abstract::The utility of genetic measures for kinship reconstruction in polysomic species is not well evaluated. We developed a framework to test hypotheses about estimating breeding population size indirectly from collections of outmigrating green sturgeon juveniles. We evaluated a polysomic dataset, in allelic frequency and p...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2010.04533.x
更新日期:2010-03-01 00:00:00
abstract::Metapopulation genetic models consider that colonization and dispersal are distinct behaviours. However, whether colonization and dispersal indeed reflect different biological processes in nature is unclear. One possibility to test this assumption is to assess patterns of autosomal and mitochondrial genetic structure ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02719.x
更新日期:2005-11-01 00:00:00
abstract::Vertically transmitted symbionts suffer a severe reduction in numbers when they pass through host generations, resulting in genetic homogeneity or even clonality of their populations. Wolbachia endosymbionts that induce cytoplasmic incompatibility in their hosts depart from this rule, because cytoplasmic incompatibili...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2003.02015.x
更新日期:2003-12-01 00:00:00
abstract::Microsatellites are one of the most important classes of nuclear genetic markers and offer many advantages for the study of marine mammals. Here we describe the isolation and characterization of 12 cetacean microsatellites which are then tested across 30 different cetacean species. For around half the species tested, ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294x.1996.tb00301.x
更新日期:1996-02-01 00:00:00
abstract::Male-killing bacteria are generally thought to attain low to intermediate prevalence in natural populations, with only mild effects on the host population sex ratio. This view was recently challenged by reports of extremely high infection frequencies in three butterfly species, raising the prospect that male killers, ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02678.x
更新日期:2005-10-01 00:00:00
abstract::Genetic diversity in experimental, domesticated and wild populations of the related yeasts, Saccharomyces cerevisiae and Saccharomyces paradoxus, has been well described at the global scale. We investigated the population genomics of a local population on a small spatial scale to address two main questions. First, is ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13954
更新日期:2017-02-01 00:00:00
abstract::The Jamaican boa (Epicrates subflavus; also called Yellow boa) is an endemic species whose natural populations greatly and constantly declined since the late 19th century, mainly because of predation by introduced species, human persecution, and habitat destruction. In-situ conservation of the Jamaican boa is seriousl...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2007.03588.x
更新日期:2008-01-01 00:00:00
abstract::The level of integration between associated partners can range from ectosymbioses to extracellular and intracellular endosymbioses, and this range has been assumed to reflect a continuum from less intimate to evolutionarily highly stable associations. In this study, we examined the specificity and evolutionary history...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13554
更新日期:2016-07-01 00:00:00
abstract::Chloroplast DNA (cpDNA) restriction site and isozyme data were combined to explore the spatial-temporal influence of the Messinian desiccation in the Mediterranean on the disjunct distribution of Androcymbium gramineum in Almería and Morocco (north and south of the straits of Gibraltar, respectively). Lack of evidence...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2003.01839.x
更新日期:2003-06-01 00:00:00
abstract::The temperature stress that pelagic fishes experience can induce physiological and behavioural changes that leave a signature in gene expression profiles. We used a functional genomics approach to identify genes that were up- or down-regulated following thermal stress in the Pacific bluefin tuna. Following the acclima...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2009.04174.x
更新日期:2009-05-01 00:00:00
abstract::The life cycles and dispersal of edible fungi are still poorly known, thus limiting our understanding of their evolution and domestication. The prized Tuber melanosporum produces fruitbodies (fleshy organs where meiospores mature) gathered in natural, spontaneously inoculated forests or harvested in plantations of nur...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13864
更新日期:2016-11-01 00:00:00
abstract::The dynamics and consequences of introgression can inform about numerous evolutionary processes. Biologists have therefore long been interested in hybridization. One challenge, however, lies in the identification of nonadmixed genotypes that can serve as a baseline for accurate quantification of admixture. In this iss...
journal_title:Molecular ecology
pub_type: 评论,杂志文章
doi:10.1111/mec.13101
更新日期:2015-03-01 00:00:00
abstract::In certain cases, a species may have access to important genetic variation present in a related species via adaptive introgression. These novel alleles may interact with their new genetic background, resulting in unexpected phenotypes. In this study, we describe a selective sweep on standing variation on the X chromos...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13382
更新日期:2015-10-01 00:00:00
abstract::We estimated the gene dispersal distance and the magnitude of inbreeding depression from the fine-scale genetic structure in the endangered heterostylous perennial Primula sieboldii. We indirectly estimated the neighbourhood size (Nb) and the standard deviation of gene dispersal distance (sigma(g)) from the detected g...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02483.x
更新日期:2005-04-01 00:00:00
abstract::The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is a worldwide pest and a vector of numerous plant viruses. B. tabaci is composed of dozens of morphologically indistinguishable biotypes and its taxonomic status is still controversial. This phloem-feeder harbours the primary symbiont Portiera aleyrodidarum and pot...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2011.05087.x
更新日期:2011-05-01 00:00:00
abstract::Nonrandom mating can structure populations and has important implications for population-level processes. Investigating how and why mating deviates from random is important for understanding evolutionary processes as well as informing conservation and management. Prior to the implementation of parentage analyses, unde...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13290
更新日期:2015-08-01 00:00:00
abstract::We define a genetic similarity rule that predicts how genetic variation in a dominant plant affects the structure of an arthropod community. This rule applies to hybridizing cottonwood species where plant genetic variation determines plant-animal interactions and structures a dependent community of leaf-modifying arth...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02749.x
更新日期:2006-04-01 00:00:00
abstract::Transcontinental migration is a fascinating example of how animals can respond to climatic oscillation. Yet, quantitative data on fitness components are scarce, and the resulting population genetic consequences are poorly understood. Migratory divides, hybrid zones with a transition in migratory behaviour, provide a n...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13521
更新日期:2016-06-01 00:00:00
abstract::We present a study of the genetic diversity and structure of a tropical tree in an insular system. Santalum austrocaledonicum is endemic to the archipelago of New Caledonia and is exploited for oil extraction from heartwood. A total of 431 individuals over 17 populations were analysed for eight polymorphic microsatell...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02576.x
更新日期:2005-06-01 00:00:00
abstract::Understanding how the environment shapes genetic variation provides critical insight about the evolution of local adaptation in natural populations. At multiple spatial scales and multiple geographic contexts within a single species, such information could address a number of fundamental questions about the scale of l...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.15731
更新日期:2020-11-12 00:00:00
abstract::Biological invasions that involve well-documented rapid adaptations to new environments provide unequalled opportunities for testing evolutionary hypotheses. Mikania micrantha Kunth (Asteraceae), a perennial herbaceous vine native to tropical Central and South America, successfully invaded tropical Asia in the early 2...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14124
更新日期:2017-07-01 00:00:00
abstract::Genetic variation can have important consequences for populations: high population genetic diversity is typically associated with ecological success. Some mechanisms that account for these benefits assume that local social groups with high genetic diversity are more successful than low-diversity groups. At the same ti...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2012.05518.x
更新日期:2012-05-01 00:00:00
abstract::The microbiomes of rhizocompartments (nodule endophytes, root endophytes, rhizosphere and root zone) in soya bean and alfalfa were analysed using high-throughput sequencing to investigate the interactions among legume species, microorganisms and soil types. A clear hierarchical filtration of microbiota by plants was o...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14027
更新日期:2017-03-01 00:00:00
abstract::During the co-evolutionary arms race between plants and herbivores, insects evolved systematic adaptive plasticity to minimize the chemical defence effects of their host plants. Previous studies mainly focused on the expressional plasticity of enzymes in detoxification and digestion. However, the expressional response...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14720
更新日期:2018-07-01 00:00:00
abstract::Sequencing reduced-representation libraries of restriction site-associated DNA (RADseq) to identify single nucleotide polymorphisms (SNPs) is quickly becoming a standard methodology for molecular ecologists. Because of the scale of RADseq data sets, putative loci cannot be assessed individually, making the process of ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14792
更新日期:2018-07-10 00:00:00
abstract::Genetic differentiation may exist among sympatric populations of a species due to long-term associations with alternative hosts (i.e. host-associated differentiation). While host-associated differentiation has been documented in several phytophagus insects, there are far fewer cases known in animal parasites. The bed ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13086
更新日期:2015-03-01 00:00:00
abstract::New methods for better identification of timber geographical origin would constitute an important technical element in the forest industry, for phytosanitary certification procedures or in the chain of custody developed for the certification of timber from sustainably managed forests. In the case of the European white...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2003.01836.x
更新日期:2003-06-01 00:00:00
abstract::Abstract Microsatellites are powerful molecular markers, used commonly to estimate intraspecific genetic distances. With the exception of band sharing similarity index, available distance measures were developed specifically for diploid organisms and are unsuited for comparisons of polyploids. Here, we present a simpl...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2004.02209.x
更新日期:2004-07-01 00:00:00