Description of the Bacterium Causing Blight of Leek as <i>Pseudomonas syringae</i> pv. <i>porri</i> (pv. nov.)

Samson, R.; Shafik, Hesham M.; Benjama, A.; Gardan, Louis

doi:10.1094/phyto.1998.88.8.844

Cited by 29 publications

(22 citation statements)

References 14 publications

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“…All Australian leek strains produced a brown diffusible pigment on TSBA and BUGä agar after 2 days, as did the known pv. porri strains, consistent with the observations of Samson et al (1998). The strain 61456 from leek derived from seed from Japan, 75520 from onion from Japan, and the pv.…”

Section: Isolation and Pathogenicity Studiessupporting

confidence: 88%

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Characterisation of Pseudomonas syringae Strains Associated with a Leaf Disease of Leek in Australia

et al. 2006

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A necrotic leaf disease of leek (Allium ampeloprasum Porrum Group) is reported in Australia for the first time. The fluorescent pseudomonad consistently associated with diseased tissue was identified as Pseudomonas syringae by LOPAT tests (+,),),),+), carbon utilisation, bean and lemon inoculations and fatty acid methyl ester analysis. It was confirmed as P. syringae pv. porri by pathogenicity to leeks, bulb onions, spring onions, shallots and garlic, and by genetic analysis using 16S rDNA PCR, REP, ERIC and BOX PCR, and IS50 PCR. Comparison with reference strains of pv. porri from other countries showed similarity to known strains of pv. porri. The Australian leek strains were generally uniform in their biochemical reactions although three strains tested varied in their pathogenicity to other Allium spp. and varied from published data. All Australian strains shared the same genetic profile with strains from New Zealand, France and California. However, Japanese strains from leek and onion were distinct from the Australian strains and those from New Zealand, France and California. Data strongly support the hypothesis that the pathogen is seed-borne.

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Section: Isolation and Pathogenicity Studiessupporting

confidence: 88%

“…Lelliot (1952) described a bacterial disease of leeks caused by a pseudomonad, later attributed to a strain of P. syringae by Hale (1975). Samson et al (1981) reported similar symptoms in France and published a description of this pathogen (Samson et al, 1998), naming it P. syringae pv. porri.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Pseudomonas syringae Strains Associated with a Leaf Disease of Leek in Australia

et al. 2006

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“…As outlined in Scheme 1, condensation of allyl 3, 8 (2) in the presence of a catalytic amount of TMSOTf gave allyl 2,3,…”

Section: Resultsmentioning

confidence: 99%

A concise synthesis of two isomeric pentasaccharides, the O repeat units from the lipopolysaccharides of P. syringae pv. porri NCPPB 3364T and NCPPB 3365

Zhang

Kong

2004

Carbohydrate Research

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, the O repeats from the lipopolysaccharides of Pseudonomonas syringae pv. porri NCPPB 3364 T and 3365 was achieved via assembly of the building blocks, allyl 3, (7), and allyl 2,4-di-O-benzoyl-a-L L -rhamnopyranoside (10). Coupling of 1 with 2 followed by deallylation and trichloroacetimidate formation gave the disaccharide donor 5, while condensation of 6 with 7, followed by dechloroacetylation, offered the disaccharide acceptor 9. Then, 5 was coupled with 10 to obtain the trisaccharide 11, and subsequent deallylation and trichloroacetimidate formation furnished the trisaccharide donor 13. Coupling of 9 with 13, followed by deprotection, afforded pentasaccharide 19, while condensation of 9 with 5, followed by deallylation and trichloroacetimidate formation, gave the tetrasaccharide donor 16, whose coupling with 10 and subsequent deprotection yielded another pentasaccharide 22.

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“…We also found that the herbicide could inhibit NFB related to γ-proteobacteria in this study. As we know, γ-proteobacteria are an important group in soil, contributing to soil nitrification, antimicrobial activity and many other functions (Bremner 1997;Samson et al 1998). Therefore, long-term chlorimuron-ethyl application clearly disturbs soil biological functions.…”

Section: Fig 2 Nitrification Potential (Np) Error Bars Standard Devmentioning

confidence: 99%

Responses of soil nitrogen-fixing, ammonia-oxidizing, and denitrifying bacterial communities to long-term chlorimuron-ethyl stress in a continuously cropped soybean field in Northeast China

Zhang

et al. 2013

Ann Microbiol

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Chlorimuron-ethyl is a type of long-residual herbicide applied widely to soybean fields in China, but little information is available about the long-term impact of this herbicide on soil nitrogen-transforming microbial communities. Soil samples (0-20 cm) were collected from three treatments (no, 5-year and 10-year application of chlorimuron-ethyl) in a continuously cropped soybean field. Plate count (CFU), most probable number (MPN) count, and clone library analyses were conducted to investigate the abundance and composition of nitrogen-fixing, ammonia-oxidizing, and denitrifying bacterial communities, and a chlorate inhibition method was adopted to measure the soil nitrification potential. Long-term chlorimuron-ethyl application reduced the abundance of soil culturable nitrogenfixing, ammonia-oxidizing, and denitrifying bacteria. Moreover, chlorimuron-ethyl decreased the diversity of nitrogenfixing and ammonia-oxidizing bacteria but promoted that of denitrifying bacteria. Chlorimuron-ethyl restrained some uncultured nitrogen-fixing bacteria, ammonia-oxidizing bacteria Nitrosospira sp. cluster 3a and 3d, and some novel or putative denitrifying bacteria. The nitrogen-fixing bacteria were closely related to Bradyrhizobium sp., ammoniaoxidizing bacteria Nitrosospira sp. cluster 3b and 3c, and most denitrifying bacteria were resistant to chlorimuronethyl. There was a negative correlation between the nitrification potential and the residual amount of soil chlorimuronethyl (R 2 =0.88, n=3, P<0.05). Therefore, long-term application of chlorimuron-ethyl in the continuously cropped soybean field could seriously disturb soil N-transforming communities, and might impact soybean soil biological quality and soybean growth. Further studies should address rational amendment models of this herbicide to reduce the possible ecological risks of long-term application of this herbicide to soybean fields.

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Description of the Bacterium Causing Blight of Leek as Pseudomonas syringae pv. porri (pv. nov.)

Cited by 29 publications

References 14 publications

Characterisation of Pseudomonas syringae Strains Associated with a Leaf Disease of Leek in Australia

Characterisation of Pseudomonas syringae Strains Associated with a Leaf Disease of Leek in Australia

A concise synthesis of two isomeric pentasaccharides, the O repeat units from the lipopolysaccharides of P. syringae pv. porri NCPPB 3364T and NCPPB 3365

Responses of soil nitrogen-fixing, ammonia-oxidizing, and denitrifying bacterial communities to long-term chlorimuron-ethyl stress in a continuously cropped soybean field in Northeast China

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