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1. Contribution of the cold shock protein CspA to virulence in Xanthomonas oryzae pv. oryzae

Author:
Gao, Xuewen,   et al.   ; Wu, Liming; Ma, Liumin; Li, Xi; Huang, Ziyang;     Show all 5 Authors
Source:
Molecular plant pathology 2019 v.20 no.3 pp. 382-391
ISSN:
1464-6722
Subject:
Western blotting; Xanthomonas oryzae pv. oryzae; biofilm; chromosomes; cold; cold shock proteins; genes; leaf blight; mutants; polysaccharides; precipitin tests; promoter regions; proteins; quantitative polymerase chain reaction; rice; transcriptomics; virulence
Abstract:
... Xanthomonas oryzae pv. oryzae (Xoo) causes a damaging bacterial leaf blight disease in rice. Cold shock proteins (Csps) are highly conserved nucleic acid‐binding proteins present in various bacterial genera, but relatively little is known about their functions in Xanthomonas. Herein, we identified four Csps (CspA–CspD) in the Xoo PXO99ᴬ strain. Deletion of cspA decreased cold adaptation and a few ...
DOI:
10.1111/mpp.12763

2. Mannan oligosaccharides trigger multiple defence responses in rice and tobacco as a novel danger‐associated molecular pattern

Author:
Gao, Xuewen,   et al.   ; Zang, Haoyu; Xie, Shanshan; Zhu, Bichun; Yang, Xue; Gu, Chunyan; Hu, Benjin; Gao, Tongchun; Chen, Yu;     Show all 9 Authors
Source:
Molecular plant pathology 2019 v.20 no.8 pp. 1067-1079
ISSN:
1464-6722
Subject:
rice; Xanthomonas oryzae pv. oryzae; cell death; Oryza sativa; reactive oxygen species; seedlings; signal transduction; salicylic acid; mass spectrometry; locust bean gum; liquid chromatography; mitogen-activated protein kinase; lactones; gene expression regulation; calcium; polymerization; elicitors; transcription (genetics); hydrolysis; pathogenesis-related proteins; oligosaccharides; tobacco; Phytophthora nicotianae; stomata; phytoalexins
Abstract:
... Oligosaccharide, a typical danger‐associated molecular pattern (DAMP), has been studied and applied as plant defence elicitor for several years. Here, we report a novel oligosaccharide, mannan oligosaccharide (MOS) with a degree of polymerization of 2–6, which was hydrolysed from locust bean gum by a newly reported enzyme, BpMan5. The MOS treatment can significantly enhance the generation of signa ...
DOI:
10.1111/mpp.12811

3. Marker assisted detection and LC-MS analysis of antimicrobial compounds in different Bacillus strains and their antifungal effect on Sclerotinia sclerotiorum

Author:
Gao, Xuewen,   et al.   ; Farzand, Ayaz; Moosa, Anam; Zubair, Muhammad; Rashid Khan, Abdur; Hanif, Alvina; Tahir, Hafiz Abdul Samad;     Show all 7 Authors
Source:
Biological control 2019 v.133 pp. 91-102
ISSN:
1049-9644
Subject:
Sclerotinia sclerotiorum; anti-infective agents; antifungal properties; bioassays; biological control; biopesticides; fungi; genes; genetic markers; iturin; leaves; liquid chromatography; mass spectrometry; mycelium; pathogens; rapeseed; screening; surfactin
Abstract:
... Bacillus strains are well studied for antagonistic effect against fungal pathogens, but the selection of potential antifungal strains is laborious and time-consuming process. Newly developed genetic markers and LC-MS based detection was undertaken simultaneously to detect eight antimicrobial compounds viz., surfactin, bacillomycin, iturin, fengycin/plipastatin, bacilysin, bacillaene, bacillibactin ...
DOI:
10.1016/j.biocontrol.2019.03.014

4. Antibacterial effects of volatiles produced by Bacillus strain D13 against Xanthomonas oryzae pv. oryzae

Author:
Gao, Xuewen,   et al.   ; Xie, Shanshan; Zang, Haoyu; Wu, Huijun; Uddin Rajer, Faheem;     Show all 5 Authors
Source:
Molecular plant pathology 2018 v.19 no.1 pp. 49-58
ISSN:
1464-6722
Subject:
Nematoda; Xanthomonas; alcohols; antibacterial properties; biological control; cell movement; coculture; cytoplasm; fungi; gas chromatography-mass spectrometry; genes; plant growth-promoting rhizobacteria; plant pathogenic bacteria; plants (botany); transcription (genetics); volatile compounds
Abstract:
... Recent investigations have demonstrated that bacteria employ the volatile compounds they produce during interactions with other organisms, such as plants, fungi, nematodes and bacteria. However, studies focused on the antibacterial activity of plant growth‐promoting rhizobacteria (PGPR) volatiles against bacterial phytopathogens are still rare. In this study, Bacillus strain D13, which is antagoni ...
DOI:
10.1111/mpp.12494

5. Identification of functional regions of the HrpZPsg protein from Pseudomonas savastanoi pv. glycinea that induce disease resistance and enhance growth in plants

Author:
Gao, Xuewen,   et al.   ; Wu, Huijun; Zhang, Yang; Zhang, Hongyue; Gu, Qin;     Show all 5 Authors
Source:
European journal of plant pathology 2017 v.147 no.1 pp. 55-71
ISSN:
0929-1873
Subject:
Pseudomonas syringae pv. savastanoi; Tobacco mosaic virus; bioactive properties; biological control agents; disease resistance; genes; hypersensitive response; mutants; pathogens; proteins; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; rice; tobacco
Abstract:
... Harpin HrpZ from the plant-pathogen Pseudomonas spp. elicits the hypersensitive response (HR), pathogen defense responses, and enhances growth in plants. To identify regions of HrpZ related to these bioactivities, we constructed 11 mutants of HrpZPₛgS₁, a 346-amino-acid harpin protein from P. savastanoi pv. glycinea S1. Results showed that proteins HrpZ₇₄–₂₀₄ and HrpZ₁–₁₉₄ could not induce macrosc ...
DOI:
10.1007/s10658-016-0979-6

6. Induction of systemic disease resistance in Nicotiana benthamiana by the cyclodipeptides cyclo (l‐Pro‐l‐Pro) and cyclo (d‐Pro‐d‐Pro)

Author:
Gao, Xuewen,   et al.   ; Wu, Liming; Wu, Huijun; Chen, Lina; Zhang, Hongyue;     Show all 5 Authors
Source:
Molecular plant pathology 2017 v.18 no.1 pp. 67-74
ISSN:
1464-6722
Subject:
Nicotiana benthamiana; Phytophthora nicotianae; Tobacco mosaic virus; bioactive properties; calcium; disease control; disease resistance; disease severity; gene expression regulation; genes; guard cells; nitric oxide; pathogens; plant diseases and disorders; proline; reactive oxygen species; salicylic acid; stomatal movement
Abstract:
... Cyclodipeptides, formed from two amino acids by cyclodehydration, are produced naturally by many organisms, and are known to possess a large number of biological activities. In this study, we found that cyclo (l‐Pro‐l‐Pro) and cyclo (d‐Pro‐d‐Pro) (where Pro is proline) could induce defence responses and systemic resistance in Nicotiana benthamiana. Treatment with the two cyclodipeptides led to a r ...
DOI:
10.1111/mpp.12381

7. Swarming motility plays the major role in migration during tomato root colonization by Bacillus subtilis SWR01

Author:
Gao, Xuewen,   et al.   ; Gao, Shengfeng; Wu, Huijun; Yu, Xinfang; Qian, Limin;     Show all 5 Authors
Source:
Biological control 2016 v.98 pp. 11-17
ISSN:
1049-9644
Subject:
Bacillus subtilis; aseptic conditions; bacterial motility; biological control; chemotaxis; flagellum; microscopy; mutants; plant growth-promoting rhizobacteria; plate count; rhizoplane; root tips; seeds; swarming; tomatoes
Abstract:
... Root colonization is important for the application of Plant Growth-Promoting Rhizobacteria (PGPR). Previously, chemotaxis was believed to be the major trait for colonization. However, because chemotaxis defective mutants are usually swarming impaired at the same time, in this study we clarified the roles played by swarming motility and chemotaxis in tomato root colonization by Bacillus subtilis SW ...
DOI:
10.1016/j.biocontrol.2016.03.011

8. Digital gene expression profiling of the pathogen-resistance mechanism of Oryza sativa 9311 in response to Bacillus amyloliquefaciens FZB42 induction

Author:
Gao, Xuewen,   et al.   ; Xie, Yongli; Wu, Liming; Zhu, Bichun; Wu, Huijun; Gu, Qin; Rajer, Faheem Uddin;     Show all 7 Authors
Source:
Biological control 2017 v.110 pp. 89-97
ISSN:
1049-9644
Subject:
Bacillus amyloliquefaciens; Oryza sativa; biochemical pathways; disease resistance; energy metabolism; ethylene; gene expression regulation; genes; growth and development; jasmonic acid; leaves; phytoalexins; plant growth; plant growth-promoting rhizobacteria; plant response; rice; roots; salicylic acid; sequence analysis; signal transduction; transcriptomics
Abstract:
... Plant growth-promoting rhizobacteria (PGPR) are beneficial soil microorganisms that colonize plant roots for nutritional purposes and benefit plants by increasing plant growth or reducing plant disease. To clarify the complex mechanisms underlying plant-PGPR interactions, transcriptomic analyses of the response of rice (Oryza sativa) 9311 to Bacillus amyloliquefaciens FZB42 were carried out using ...
DOI:
10.1016/j.biocontrol.2017.04.009

9. Volatile Compounds of Endophytic Bacillus spp. have Biocontrol Activity Against Sclerotinia sclerotiorum

Author:
Gao, Xuewen,   et al.   ; Massawe, Venance Colman; Hanif, Alvina; Farzand, Ayaz; Mburu, David Kibe; Ochola, Sylvans Ochieng; Wu, Liming; Tahir, Hafiz Abdul Samad; Gu, Qin; Wu, Huijun;     Show all 10 Authors
Source:
Phytopathology 2018 v.108 no.12 pp. 1373-1385
ISSN:
0031-949X
Subject:
Sclerotinia sclerotiorum; biological control; color; corn; disease control; endophytes; fungi; gas chromatography-mass spectrometry; host plants; in vitro studies; leaves; mycelium; oxalic acid; pH; potassium permanganate; sclerotia; titration; ultrastructure; volatile organic compounds
Abstract:
... To develop an effective biological agent to control Sclerotinia sclerotiorum, three endophytic Bacillus spp. strains with high antagonistic activity were isolated from maize seed and characterized. In vitro assays revealed that the Bacillus endophytes could produce volatile organic compounds (VOC) that reduced sclerotial production and inhibited mycelial growth of S. sclerotiorum. Gas chromatograp ...
DOI:
10.1094/PHYTO-04-18-0118-R

10. Effect of volatile compounds produced by Ralstonia solanacearum on plant growth promoting and systemic resistance inducing potential of Bacillus volatiles

Author:
Gao, Xuewen,   et al.   ; Tahir, Hafiz Abdul Samad; Gu, Qin; Wu, Huijun; Raza, Waseem; Safdar, Asma; Huang, Ziyang; Rajer, Faheem Uddin;     Show all 8 Authors
Source:
BMC plant biology 2017 v.17 no.1 pp. 133
ISSN:
1471-2229
Subject:
Bacillus subtilis; Nicotiana tabacum; Ralstonia solanacearum; bacterial wilt; coculture; ethylene production; genes; growth promotion; plant growth; plant growth-promoting rhizobacteria; plant pathogens; tobacco; volatile organic compounds
Abstract:
... BACKGROUND: Microbial volatiles play an expedient role in the agricultural ecological system by enhancing plant growth and inducing systemic resistance against plant pathogens, without causing hazardous effects on the environment. To explore the effects of VOCs of Ralstonia solanacearum TBBS1 (Rs) on tobacco plant growth and on plant growth promoting efficiency of VOCs produced by Bacillus subtili ...
DOI:
10.1186/s12870-017-1083-6
PubMed:
28768498
PubMed Central:
PMC5541429

11. Acute toxicity assessment of explosive-contaminated soil extracting solution by luminescent bacteria assays

Author:
Gao, Xuewen,   et al.   ; Xu, Wenjie; Jiang, Zhenming; Zhao, Quanlin; Zhang, Zhenzhong; Su, Hongping; Ye, Zhengfang;     Show all 7 Authors
Source:
Environmental science and pollution research international 2016 v.23 no.22 pp. 22803-22809
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; Photobacterium phosphoreum; Vibrio fischeri; acute toxicity; bacteria; ecosystems; luminescence; people; polluted soils; remediation; soil washing; temperature; ultrasonics
Abstract:
... Explosive-contaminated soil is harmful to people’s health and the local ecosystem. The acute toxicity of its extracting solution was tested by bacterial luminescence assay using three kinds of luminescent bacteria to characterize the toxicity of the soil. An orthogonal test L ₁₆ (4⁵) was designed to optimize the soil extracting conditions. The optimum extracting conditions were obtained when the u ...
DOI:
10.1007/s11356-016-7492-5

12. FvSet2 regulates fungal growth, pathogenicity, and secondary metabolism in Fusarium verticillioides

Author:
Gao, Xuewen,   et al.   ; Gu, Qin; Wang, Zhenzhong; Sun, Xiao; Ji, Tiantian; Huang, Hai; Yang, Yang; Zhang, Hao; Tahir, Hafiz Abdul Samad; Wu, Liming; Wu, Huijun;     Show all 11 Authors
Source:
Fungal genetics and biology 2017 v.107 pp. 24-30
ISSN:
1087-1845
Subject:
Fusarium verticillioides; Saccharomyces cerevisiae; biosynthesis; eukaryotic cells; fungi; genes; histones; lysine; methylation; methyltransferases; microbial growth; mutants; pigmentation; vegetative growth; virulence
Abstract:
... Histone H3 lysine 36 methylation (H3K36me) is generally associated with activation of gene expression in most eukaryotic cells. However, the function of H3K36me in filamentous fungi is largely unknown. Set2 is the sole lysine histone methyltransferase (KHMTase) enzyme responsible for the methylation of H3K36 in Saccharomyces cerevisiae. In the current study, we identified a single ortholog of S. c ...
DOI:
10.1016/j.fgb.2017.07.007

13. Bacilysin overproduction in Bacillus amyloliquefaciens FZB42 markerless derivative strains FZBREP and FZBSPA enhances antibacterial activity

Author:
Gao, Xuewen,   et al.   ; Wu, Liming; Wu, Huijun; Chen, Lina; Lin, Ling; Borriss, Rainer;     Show all 6 Authors
Source:
Applied microbiology and biotechnology 2015 v.99 no.10 pp. 4255-4263
ISSN:
0175-7598
Subject:
Bacillus amyloliquefaciens; Clavibacter michiganensis; Staphylococcus aureus; antibacterial properties; antibiotic resistance; bacterial ring rot; biological control; chloramphenicol; operon; plasmids; promoter regions; protective effect; reverse transcriptase polymerase chain reaction; spectinomycin; temperature; tubers
Abstract:
... Bacillus amyloliquefaciens strains FZBREP and FZBSPA were derived from the wild-type FZB42 by replacement of the native bacilysin operon promoter with constitutive promoters P ᵣₑₚB and P ₛₚₐc from plasmids pMK3 and pLOSS, respectively. These strains contained two antibiotic resistance genes, and markerless strains were constructed by deleting the chloramphenicol resistance cassette and promoter re ...
DOI:
10.1007/s00253-014-6251-0

14. A novel thermostable GH5_7 β-mannanase from Bacillus pumilus GBSW19 and its application in manno-oligosaccharides (MOS) production

Author:
Gao, Xuewen,   et al.   ; Zang, Haoyu; Xie, Shanshan; Wu, Huijun; Wang, Weiduo; Shao, Xiankun; Wu, Liming; Rajer, Faheem Uddin;     Show all 8 Authors
Source:
Enzyme and microbial technology 2015 v.78 pp. 1-9
ISSN:
0141-0229
Subject:
Bacillus pumilus; active sites; amino acids; beta-mannosidase; carbohydrate binding; detergents; glycosides; high performance liquid chromatography; ions; locust bean gum; molecular weight; oligosaccharides; pH; signal peptide; solvents; temperature; thermal stability; thermostable enzymes; value added
Abstract:
... A novel thermostable mannanase from a newly isolated Bacillus pumilus GBSW19 has been identified, expressed, purified and characterized. The enzyme shows a structure comprising a 28 amino acid signal peptide, a glycoside hydrolase family 5 (GH5) catalytic domain and no carbohydrate-binding module. The recombinant mannanase has molecular weight of 45kDa with an optimal pH around 6.5 and is stable i ...
DOI:
10.1016/j.enzmictec.2015.06.007

15. Identification of Up-regulated Genes of Bacillus amyloliquefaciens B55 During the Early Stage of Direct Surface Contact with Rice R109 Root

Author:
Gao, Xuewen,   et al.   ; Liu, Jun; He, Dan; Ma, Xin; Wu, Huijun;     Show all 5 Authors
Source:
Current microbiology 2011 v.62 no.1 pp. 267-272
ISSN:
0343-8651
Subject:
Bacillus amyloliquefaciens; DNA; RNA; gene expression regulation; genes; plant growth; plant growth-promoting rhizobacteria; rice; root exudates; roots
Abstract:
... The early stage of plant-rhizobacteria interaction, affected by plant root exudates and plant-rhizobacteria surface contact, is considered to be critical for plant growth-promoting rhizobacteria colonizing plant roots and initiating the beneficial effects on plant growth. However, little is known about the mechanisms of plant-rhizobacteria surface contact involved in early stage of plant-rhizobact ...
DOI:
10.1007/s00284-010-9701-7
PubMed:
20625734

16. The Rhizobacterium Bacillus amyloliquefaciens subsp. plantarum NAU-B3 Contains a Large Inversion within the Central Portion of the Genome

Author:
Gao, Xuewen,   et al.   ; Wu, Huijun; Qiao, Junqing; Blom, Jochen; Rueckert, Christian; Reva, Oleg; Borriss, Rainer;     Show all 7 Authors
Source:
Genome announcements 2013 v.1 no.6 pp. e00941-13
ISSN:
2169-8287
Subject:
Bacillus amyloliquefaciens; Rhizobium; antimicrobial peptides; lipopeptides; multigene family; polyketides
Abstract:
... The genome of rhizobacterium Bacillus amyloliquefaciens subsp. plantarum strain NAU-B3 is 4,196,170 bp in size and harbors 4,001 genes. Nine giant gene clusters are dedicated to the nonribosomal synthesis of antimicrobial lipopeptides and polyketides. Remarkably, NAU_B3 contains a large inversion within the central portion of the genome. ...
DOI:
10.1128/genomeA.00941-13

17. Expression of soybean lectin in transgenic tobacco results in enhanced resistance to pathogens and pests

Author:
Gao, Xuewen,   et al.   ; Guo, Peipei; Wang, Yu; Zhou, Xiaohui; Xie, Yongli; Wu, Huijun;     Show all 6 Authors
Source:
Plant science 2013 v.211 pp. 17-22
ISSN:
0168-9452
Subject:
Phytophthora nicotianae; Southern blotting; Spodoptera exigua; agronomic traits; bioassays; carbohydrates; chromosomes; entomopathogens; genes; insect pests; larvae; larval development; leaves; lectins; metamorphosis; reverse transcriptase polymerase chain reaction; soybeans; tobacco; transgenic plants; weight gain
Abstract:
... Lectins are proteins of non-immune origin that specifically interact with carbohydrates, known to play important roles in the defense system of plants. In this study, in order to study the function of a new soybean lectin (SBL), the corresponding encoding gene lec-s was introduced into tobacco plants via Agrobacterium-mediated transformation. Southern blot analyses had revealed that the lec-s gene ...
DOI:
10.1016/j.plantsci.2013.06.001
PubMed:
23987807

18. The purL gene of Bacillus subtilis is associated with nematicidal activity

Author:
Gao, Xuewen,   et al.   ; Xia, Yanfei; Xie, Shanshan; Ma, Xin; Wu, Huijun; Wang, Xuan;     Show all 6 Authors
Source:
FEMS microbiology letters 2011 v.322 no.2 pp. 99-107
ISSN:
0378-1097
Subject:
Aphelenchoides besseyi; Bacillus amyloliquefaciens; Bacillus subtilis; Bursaphelenchus xylophilus; Ditylenchus destructor; Meloidogyne javanica; active ingredients; biological control agents; cold; genes; heat; molecular weight; mortality; mutants; nematicidal properties; plant parasitic nematodes; plant pathogens; plasmids; polymerase chain reaction; solvents; transposons
Abstract:
... Parasitic nematodes of plants are important plant pathogens that represent a significant financial burden on agriculture. This study evaluated the efficacy of Bacillus spp. as nematode biocontrol agents and identified Bacillus genes associated with nematicidal activity. Culture by products of Bacillus subtilis strains OKB105 and 69 and Bacillus amyloliquefaciens strains FZB42 and B3 were used to t ...
DOI:
10.1111/j.1574-6968.2011.02336.x

19. The role of synergistic action and molecular mechanism in the effect of genetically engineered strain Bacillus subtilis OKBHF in enhancing tomato growth and Cucumber mosaic virus resistance

Author:
Gao, Xuewen,   et al.   ; Wang, Shuai; Wu, Huijun; Zhan, Jiang; Xia, Yanfei; Gao, Shengfeng; Wang, Weiduo; Xue, Pengqi;     Show all 8 Authors
Source:
BioControl 2011 v.56 no.1 pp. 113-121
ISSN:
1386-6141
Subject:
Bacillus subtilis; Cucumber mosaic virus; Xanthomonas oryzae pv. oryzicola; biological control; cell death; cell growth; disease severity; flowers; genes; genetically engineered microorganisms; greenhouse experimentation; insects; plant growth; plant growth-promoting rhizobacteria; plant pathogens; proteins; reverse transcriptase polymerase chain reaction; rice; synergism; tomatoes
Abstract:
... Bacillus subtilis is well known for its biocontrol activity against several plant pathogens and for its role in promoting plant growth. HpaGXooc, from rice pathogenic bacterium Xanthomonas oryzae pv. oryzicola, is a member of the harpin group of proteins. It is known to elicit hypersensitive cell death in non-host plants, thereby inducing disease and insect resistance in the plants and enhancing p ...
DOI:
10.1007/s10526-010-9306-x

20. Overexpression of a Harpin-encoding gene hrf1 in rice enhances drought tolerance

Author:
Gao, Xuewen,   et al.   ; Zhang, Lei; Xiao, Shanshan; Li, Wenqi; Feng, Wei; Li, Juan; Wu, Zhidan; Liu, Fengquan; Shao, Min;     Show all 9 Authors
Source:
Journal of experimental botany 2011 v.62 no.12 pp. 4229-4238
ISSN:
0022-0957
Subject:
Myzus persicae; abscisic acid; cotton; crops; drought tolerance; gene overexpression; genes; hypersensitive response; oxygen; plant diseases and disorders; plant response; proline; proteins; rice; stomatal movement; stress tolerance; sugars; systemic acquired resistance; tobacco; water stress
Abstract:
... Harpin proteins are well known as eliciters that induce multiple responses in plants, such as systemic acquired resistance, hypersensitive response, enhancement of growth, resistance to the green peach aphid, and tolerance to drought. Overexpression of Harpin-encoding genes enhances plant resistance to diseases in tobacco, rice, rape, and cotton; however, it is not yet known whether the expression ...
DOI:
10.1093/jxb/err131
PubMed:
21527628
PubMed Central:
PMC3153678