leptographium sinoprocerum sp. nov., an undescribed species associated with pinus tabuliformis-dendroctonus valens in northern china.during a study of ophiostomatoid fungi associated with the invasive pest dendroctonus valens in the pinus tabuliformis ecosystem in northern china, a multigenic (its2-lsu, beta-tubulin and ef1-alpha) phylogenetic analysis and examination of morphological features revealed in addition to leptographium procerum the occurrence of an undescribed species. the new species, leptographium sinoprocerum, belongs to the l. procerum-l. profanum clade. both l. procerum and l. sinoprocerum are similar to each ...200818592901
yeast diversity associated with invasive dendroctonus valens killing pinus tabuliformis in china using culturing and molecular methods.bark beetle-associated yeasts are much less studied than filamentous fungi, yet they are also considered to play important roles in beetle nutrition, detoxification, and chemical communication. the red turpentine beetle, dendroctonus valens, an invasive bark beetle introduced from north america, became one of the most destructive pests in china, having killed more than 10 million pinus tabuliformis as well as other pine species. no investigation of yeasts associated with this bark beetle in its ...201424691849
functional characterization of the late embryogenesis abundant (lea) protein gene family from pinus tabuliformis (pinaceae) in escherichia coli.late embryogenesis abundant (lea) proteins are a large and highly diverse gene family present in a wide range of plant species. leas are proposed to play a role in various stress tolerance responses. our study represents the first-ever survey of lea proteins and their encoding genes in a widely distributed pine (pinus tabuliformis) in china. twenty-three lea genes were identified from the p. tabuliformis belonging to seven groups. proteins with repeated motifs are an important feature specific t ...201626781930
inducible pine rosin defense mediates interactions between an invasive insect-fungal complex and newly acquired sympatric fungal associates.mutualism between insects and fungi drives insect evolutionary diversification and niche expansion; for invasive insects, however, mechanisms by which they maintain mutualistic relationships with beneficial fungi have not been clearly explored. here, we report that an invasive herbivorous insect, the red turpentine beetle (rtb), with its co-invasive mutualistic fungus, leptographium procerum, has newly acquired a set of sympatric fungi during invasion, which could potentially outcompete the rtb ...201525939920
three new eriophyoid mite species in the tribe phyllocoptini from yunnan province, southwestern china (acari: eriophyidae: phyllocoptinae).in this paper, three new phyllocoptini eriophyoid mite species from yunnan province, china are described and illustrated: proiectus rodgeseta sp. nov. on pinus armandii franch. (pinaceae), proiectus granularpro sp. nov. on pinus tabuliformis carr. (pinaceae) and phyllocoptrutajuniperiana sp. nov. on juniperus chinensis linn. (cupressaceae). all are vagrants causing no apparent damage to their host plants. a key to the species of proiectus is provided.201326146722
does cryptic microbiota mitigate pine resistance to an invasive beetle-fungus complex? implications for invasion potential.microbial symbionts are known to assist exotic pests in their colonization of new host plants. however, there has been little evidence linking symbiotic invasion success to mechanisms for mitigation of native plant resistance. the red turpentine beetle (rtb) was introduced with a fungus, leptographium procerum, to china from the united states and became a destructively invasive symbiotic complex in natural pinus tabuliformis forests. here, we report that three chinese-resident fungi, newly acqui ...201627621032
Stability in and correlation between factors influencing genetic quality of seed lots in seed orchard of Pinus tabuliformis Carr. over a 12-year span.Coniferous seed orchards require a long period from initial seed harvest to stable seed production. Differential reproductive success and asynchrony are among the main factors for orchard crops year-to-year variation in terms of parental gametic contribution and ultimately the genetic gain. It is fundamental in both making predictions about the genetic composition of the seed crop and decisions about orchard roguing and improved seed orchard establishment. In this paper, a primary Chinese pine s ...201121887269
complex interactions among host pines and fungi vectored by an invasive bark beetle.*recent studies have investigated the relationships between pairs or groups of exotic species to illustrate invasive mechanisms, but most have focused on interactions at a single trophic level. *here, we conducted pathogenicity tests, analyses of host volatiles and fungal growth tests to elucidate an intricate network of interactions between the host tree, the invasive red turpentine beetle and its fungal associates. *seedlings inoculated with two strains of leptographium procerum isolated from ...201020546136
ophiostomatoid fungi (ascomycota) associated with pinus tabuliformis infested by dendroctonus valens (coleoptera) in northern china and an assessment of their pathogenicity on mature trees.dendroctonus valens is an invasive pest in coniferous forests of northern china. it was suspected of being responsible for the death of more than three million pinus tabuliformis trees. the present study sought to identify the ophiostomatoid fungi associated with d. valens in northern china and understand the possible role of these fungi in the pine decline. on the basis of morphology, physiology, mating compatibility and phylogenetic analyses of multiple dna sequences, seven species of ophiosto ...200919404768
electrophysiological and behavioral responses of dendroctonus valens (coleoptera: curculionidae: scolytinae) to four bark beetle pheromones.the red turpentine beetle, dendroctonus valens leconte (coleoptera: curculionidae: scolytinae), has caused extensive mortality of pinus tabuliformis carrière in north central china. the electrophysiological and behavioral activities of the four bark beetle pheromones, frontalin, exo-brevicomin, trans-verbenol, and cis-verbenol, singly or in combination with host-produced kairomones, were tested on red turpentine beetles. both sexes showed a consistent electrophysiological response to the four te ...200919389297
cross-attraction between an exotic and a native pine bark beetle: a novel invasion mechanism?aside from the ecological impacts, invasive species fascinate ecologists because of the unique opportunities that invasives offer in the study of community ecology. some hypotheses have been proposed to illustrate the mechanisms that allow exotics to become invasive. however, positive interactions between exotic and native insects are rarely utilized to explain invasiveness of pests.200718074026
chromosomal localization of 5s and 18s-5.8s-25s ribosomal dna sites in five asian pines using fluorescence in situ hybridization.fluorescence in situ hybridization (fish) was employed on mitotic metaphase chromosome preparations of five asian pinus species: pinus tabuliformis, pinus yunnanensis, pinus densata, pinus massoniana and pinus merkusii, using simultaneously dna probes of the 18s rrna gene and the 5s rrna gene including the non-transcribed spacer sequences. the number and location of 18s rdna sites varied markedly (5-10 pairs of strong signals) among the five pines. a maximum of 20 major 18s rdna sites was observ ...200312582844
[distribution of fine root biomass of main planting tree species in loess plateau, china].the distribution of fine roots of pinus tabuliformis, populus tomentosa, prunus armeniaca, robinia pseudoacacia, hippophae rhamnoides, and caragana korshinskii was investigated by using soil core method and the fine root was defined as root with diameter less than 2 mm. the soil moisture and soil properties were measured. the results showed that in the horizontal direction, the distribution of fine root biomass of p. tabuliformis presented a conic curve, and the fine root biomass of the other sp ...201425345038
invasive bark beetle-associated microbes degrade a host defensive monoterpene.conifers respond to herbivore attack with defensive chemicals, which are toxic to both insects and their associated microorganisms. microorganisms associated with insects have been widely reported to metabolize toxic chemicals, which may help both microorganisms and host insects overcome host conifer defense. dendroctonus valens leconte, an introduced exotic pest from north america to china, has killed millions of healthy pines. alpha-pinene is the most abundant defensive monoterpene in chinese ...201626224144
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