Xianchun Li

ORCID: 0000-0001-8332-7356
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About
Contact & Profiles
Research Areas
  • Insect Resistance and Genetics
  • Insect-Plant Interactions and Control
  • Insect and Pesticide Research
  • Insect Pest Control Strategies
  • CRISPR and Genetic Engineering
  • Thermochemical Biomass Conversion Processes
  • Entomopathogenic Microorganisms in Pest Control
  • Catalytic Processes in Materials Science
  • Plant Virus Research Studies
  • Insect symbiosis and bacterial influences
  • Genetically Modified Organisms Research
  • Viral Infectious Diseases and Gene Expression in Insects
  • Iron and Steelmaking Processes
  • Industrial Gas Emission Control
  • Coal Properties and Utilization
  • Metal Extraction and Bioleaching
  • Nanomaterials for catalytic reactions
  • Forest Insect Ecology and Management
  • Insect and Arachnid Ecology and Behavior
  • Agricultural pest management studies
  • Extraction and Separation Processes
  • Advanced Cellulose Research Studies
  • Neurobiology and Insect Physiology Research
  • RNA Research and Splicing
  • Advanced Combustion Engine Technologies

University of Arizona
2016-2025

Nanjing Forestry University
2025

University of Science and Technology Liaoning
2009-2024

Fuyang City People's Hospital
2020

Institute of Plant Protection
2016-2019

Chinese Academy of Agricultural Sciences
2015-2019

Michigan State University
2014

Institute of Entomology
2012

First Hospital of Jiaxing
2012

BIO5 Institute
2012

Minsheng You and colleagues report the whole-genome sequence of diamondback moth, Plutella xylostella. Their transcriptome analysis from different life stages, together with comparative genomic phylogenetic analysis, provides insights into herbivore evolution insect adaptation to plant feeding detoxification. How an evolves become a successful is profound biological practical importance. Herbivores are often adapted feed on specific group evolutionarily biochemically related host plants1,...

10.1038/ng.2524 article EN cc-by-nc-sa Nature Genetics 2013-01-13

Abstract The sweetpotato whitefly Bemisia tabaci is a highly destructive agricultural and ornamental crop pest. It damages host plants through both phloem feeding vectoring plant pathogens. Introductions of B. are difficult to quarantine eradicate because its high reproductive rates, broad range, insecticide resistance. A total 791 Gb raw DNA sequence from whole genome shotgun sequencing, 13 BAC pooling libraries were generated by Illumina sequencing using different combinations mate-pair...

10.1093/gigascience/gix018 article EN cc-by GigaScience 2017-03-15

How polyphagous herbivores cope with the diversity and unpredictability of plant defenses remains largely unknown at both genetic molecular levels. To examine whether generalist counterdefense enzymes are structurally more flexible functionally diverse, two counterdefensive allelochemical-metabolizing cytochrome P450 proteins, CYP6B1 from specialist Papilio polyxenes , feeding on furanocoumarin-containing plants, CYP6B8 Helicoverpa zea hundreds host species, compared functionally. Molecular...

10.1073/pnas.0308691101 article EN Proceedings of the National Academy of Sciences 2004-02-23

Significance We report eradication of the pink bollworm, one world’s most damaging crop pests, from cotton-growing areas continental United States and northern Mexico. A coordinated, multitactic program achieved this success a century after pest invaded both countries. The included releases billions sterile bollworm moths airplanes planting cotton engineered to produce insect-killing proteins bacterium Bacillus thuringiensis . Analysis computer simulations 21 y field data Arizona indicate...

10.1073/pnas.2019115118 article EN Proceedings of the National Academy of Sciences 2020-12-23

While every individual of Bemisia tabaci (Hemiptera: Aleyrodidae) harbors the primary symbiont (P-symbiont) Portiera, infection frequencies six secondary symbionts (S-symbionts) including Hamiltonella, Arsenophonus, Cardinium, Wolbachia, Rickettsia and Fritschea vary greatly among different populations. To characterize factors influencing dynamics S-symbionts in B. tabaci, gene-specific PCR were conducted to screen for presence P-symbiont Portiera 61 (17 B 44 Q biotypes) field populations...

10.1371/journal.pone.0030760 article EN cc-by PLoS ONE 2012-02-23

Significance Crops genetically engineered to produce insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) kill some major pests and reduce use of insecticide sprays. However, evolution pest resistance Bt decreases these benefits. We report a strategy for combating by crossing transgenic plants with conventional non-Bt then sowing second-generation seeds. This yields random mixture within fields three-quarters that protein one-quarter does not. An 11-y field study in China...

10.1073/pnas.1700396114 article EN Proceedings of the National Academy of Sciences 2017-05-08

A strain of the whitefly Bemisia tabaci (Gennadius) possessing unusually high levels resistance to a wide range insecticides was discovered in 2004 course routine monitoring Arizona. The multiply resistant insects, collected from poinsettia (Euphorbia pulcherrima Willd. ex Klotzsch) plants purchased at retail store Tucson, were subjected biotype analysis three laboratories. Polyacrylamide gel electrophoresis naphthyl esterases and sequencing mitochondrial cytochrome oxidase I gene (780 bp)...

10.1603/ec10239 article EN Journal of Economic Entomology 2010-12-01

Pyrolysis and combustion characteristics of an Indonesian low-rank coal are studied under oxy-fuel (O2/CO2) air (O2/N2) conditions using a drop tube furnace (DTF) thermogravimetric analyzer (TGA). Raw coal, dried binderless briquette samples the same were used in experiments, effects drying briquetting on reactivity different investigated. Chars prepared DTF both N2 CO2 atmospheres temperature range 800−1400 °C. The chars was analyzed TGA. differed from that conditions. at which significant...

10.1021/ef900533d article EN Energy & Fuels 2009-09-25

The refuge strategy is used worldwide to delay the evolution of pest resistance insecticides that are either sprayed or produced by transgenic Bacillus thuringiensis (Bt) crops. This based on idea refuges host plants where pests not exposed an insecticide promote survival susceptible pests. Despite widespread adoption this approach, large-scale tests have been problematic. Here we tested with 8 y data and pyriproxyfen in 84 populations sweetpotato whitefly ( Bemisia tabaci ) from cotton...

10.1073/pnas.1117851109 article EN Proceedings of the National Academy of Sciences 2012-01-03

Abstract Transgenic crops that produce Bacillus thuringiensis (Bt) proteins for pest control are grown extensively, but insect adaptation can reduce their effectiveness. Established mode of action models assert Bt Cry1Ab and Cry1Ac produced as inactive protoxins require conversion to a smaller activated form exert toxicity. However, contrary this widely accepted paradigm, we report evidence from seven resistant strains three major crop pests showing were generally more potent than the...

10.1038/srep15107 article EN cc-by Scientific Reports 2015-10-12

Abstract Four cytochrome P450 genes, CYP6B8 , CYP6B9 CYP6B27 and CYP6B28 exist in the Helicoverpa zea genome as two pairs of paralogs that evolved from gene duplication 5′‐polar conversion events. RT‐PCR gel blot analyses have shown all these genes are expressed constitutively midguts larval instars, suggesting they primary roles detoxification plant allelochemicals. Among these, is only midgut tissue whereas its paralog, primarily secondarily fat body ovary. midgut, and, to lesser extents...

10.1046/j.1365-2583.2002.00341.x article EN Insect Molecular Biology 2002-07-25
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