Daowan Lai

ORCID: 0000-0001-7984-5855
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About
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Research Areas
  • Microbial Natural Products and Biosynthesis
  • Fungal Biology and Applications
  • Marine Sponges and Natural Products
  • Plant Pathogens and Fungal Diseases
  • Mycotoxins in Agriculture and Food
  • Phytochemical compounds biological activities
  • Plant-Microbe Interactions and Immunity
  • Natural product bioactivities and synthesis
  • Synthetic Organic Chemistry Methods
  • Chemical synthesis and alkaloids
  • Plant biochemistry and biosynthesis
  • Essential Oils and Antimicrobial Activity
  • Plant and fungal interactions
  • Fungal and yeast genetics research
  • Synthesis and Biological Activity
  • Phytochemistry and Biological Activities
  • Phytochemicals and Antioxidant Activities
  • Microbial Metabolism and Applications
  • Alkaloids: synthesis and pharmacology
  • Insect Pest Control Strategies
  • CRISPR and Genetic Engineering
  • Phytochemical Studies and Bioactivities
  • Genomics and Phylogenetic Studies
  • Pharmacological Effects of Natural Compounds
  • Traditional and Medicinal Uses of Annonaceae

China Agricultural University
2016-2025

Sanya University
2025

Institute of Plant Protection
2016-2025

Ministry of Agriculture and Rural Affairs
2020

State Council of the People's Republic of China
2020

Heinrich Heine University Düsseldorf
2012-2015

University of Benin
2015

Beijing University of Agriculture
2015

Institut für Biotechnologie und Wirkstoff-Forschung
2014

Peking University
2010-2013

Coculturing the fungal endophyte Fusarium tricinctum with bacterium Bacillus subtilis 168 trpC2 on solid rice medium resulted in an up to 78-fold increase accumulation constitutively present secondary metabolites that included lateropyrone (5), cyclic depsipeptides of enniatin type (6-8), and lipopeptide fusaristatin A (9). In addition, four compounds (1-4) including (-)-citreoisocoumarin (2) as well three new natural products (1, 3, 4) were not discrete bacterial controls only detected...

10.1021/np400589h article EN Journal of Natural Products 2013-10-31

A chemical investigation of the endophytic fungus Epicoccum nigrum isolated from leaves Mentha suaveolens collected in Morocco resulted isolation five new polyketides, epicocconigrones and B (1 2), 3-methoxyepicoccone (3), (4), 2,3,4-trihydroxy-6-(methoxymethyl)-5-methylbenzaldehyde (5), together with known compounds (6-10). The structures were unambiguously determined by extensive analysis 1D 2D NMR mass spectroscopic data. Compounds 1 10 showed potent inhibition at least 15 protein kinases...

10.1021/np4005745 article EN Journal of Natural Products 2013-12-16

The endophytic fungus Penicillium citrinum was isolated from a fresh stem of the Moroccan plant Ceratonia siliqua. Extracts P. grown on rice and white bean media yielded five new compounds, namely, citriquinochroman (1), tanzawaic acids G H (2 3), 6-methylcurvulinic acid (4), 8-methoxy-3,5-dimethylisoquinolin-6-ol (5), one natural product, 1,2,3,11b-tetrahydroquinolactacide (6), which had previously been described as synthetic compound. In addition, 13 known compounds including seven...

10.1021/np4001366 article EN Journal of Natural Products 2013-05-28

Ustilaginoidins were bis-naphtho-γ-pyrones mycotoxins possessing an aR configuration of the chiral axis previously reported from false smut balls rice infected by fungal pathogen Ustilaginoidea virens. To investigate chemical diversity these metabolites and their bioactivities, we fermented this fungus on solid media, which afforded isolation 13 ustilaginoidins, including seven new compounds, namely ustilaginoidins K–P, 1–6, E1, 7, together with known A, 8, D, 9, E, 10, F, 11, G, 12,...

10.1021/acs.jafc.5b00694 article EN Journal of Agricultural and Food Chemistry 2015-03-17

Chemical investigation of the EtOAc extract endophytic fungus Bionectria ochroleuca, isolated from inner leaf tissues plant Sonneratia caseolaris (Sonneratiaceae) Hainan island (China), yielded two new peptides, pullularins E and F (1 2) together with three known compounds (3–5). The structures were unambiguously determined on basis one- two-dimensional NMR spectroscopy as well by high-resolution mass spectrometry. absolute configurations amino acids HPLC analysis acid hydrolysates using...

10.3390/md10051081 article EN cc-by Marine Drugs 2012-05-18

Ustiloxins were cyclopeptide mycotoxins from rice false smut balls (FSBs) that formed in spikelets infected by the fungal pathogen Ustilaginoidea virens. To investigate chemical diversity of these metabolites and their bioactivities, one new cyclopeptide, ustiloxin G (1), together with four known congeners-ustiloxins A (2), B (3), D (4), F (5)-were isolated water extract FSBs. Their structures elucidated analyses physical spectroscopic data, including ultraviolet spectrometry (UV), infrared...

10.3390/toxins9020054 article EN cc-by Toxins 2017-02-10

Ustilaginoidins are a class of bis-naphtho-γ-pyrones, typically produced by Villosiclava virens, the pathogen rice false smut (RFS), which has been one most destructive fungal diseases. Previously, we found that ustilaginoidins identified from culture V. virens on medium were less polar than those reported RFS balls in general. In this study, reinvestigated high-performance liquid chromatography with diode array detection and high-resolution mass spectrometry (HPLC-DAD-HRMS) profile ethyl...

10.1021/acs.jafc.7b01791 article EN Journal of Agricultural and Food Chemistry 2017-06-02

Nine new spirobisnaphthalenes, palmarumycins B1-B9 (1-9), along with 13 known compounds (10-22), were isolated from cultures of the fungus Berkleasmium sp., an endophyte medicinal plant Dioscorea zingiberensis C. H. Wright. The structures elucidated by analysis 1D and 2D NMR HRESIMS spectra comparison compounds. Compounds 7-9 contain uncommon 2,3-dihydro-1H-inden-1-one unit. All evaluated for their antibacterial activities against Bacillus subtilis, Staphylococcus hemolyticus, Agrobacterium...

10.1021/np400988a article EN Journal of Natural Products 2014-09-19

Six new dibenzo-α-pyrones, rhizopycnolides A (1) and B (2) rhizopycnins A–D (3–6), together with eight known congeners (7–14), were isolated from the endophytic fungus Rhizopycnis vagum Nitaf22 obtained Nicotiana tabacum. The structures of compounds unambiguously elucidated using NMR, HRESIMS, TDDFT ECD calculation, X-ray crystallography data. Rhizopycnolides feature an uncommon γ-butyrolactone-fused dibenzo-α-pyrone tetracyclic skeleton (6/6/6/5), while rhizopycnin (4) was first amino group...

10.1021/acs.jnatprod.6b00327 article EN Journal of Natural Products 2016-07-21

The EtOAc extract of the liquid fermentation Alternaria sp. Samif01, an endophytic fungus obtained from Salvia miltiorrhiza Bunge, showed antibacterial activity against several tested bacterial pathogens. Fractionation this led to isolation seven dibenzo-α-pyrones (1–7), including one new compound, 2-acetoxy-2-epi-altenuene (1) and natural product, 3-epi-dihydroaltenuene A (2). structures metabolites were elucidated by comprehensive analysis spectroscopic data (1D, 2D) NMR HRESIMS, while...

10.1080/14786419.2016.1205052 article EN Natural Product Research 2016-07-07
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