Resistance to soft rot (Erwinia carotovora subsp.atroseptica) in tetraploid potato families obtained from 4x-2x crosses

2005 ◽  
Vol 82 (3) ◽  
pp. 203-210 ◽  
Author(s):  
R. Lebecka ◽  
E. Zimnoch-Guzowska ◽  
Z. Kaczmarek
Keyword(s):  
Erwinia Carotovora ◽  
Soft Rot ◽  
Tetraploid Potato ◽  
Erwinia Carotovora Subsp.Atroseptica ◽  
Soft Rot Erwinia

Assessing potato cultivars for resistance to tuber soft rot (Erwinia carotovora subsp.atroseptica) at four test centres in the UK

1988 ◽  
Vol 31 (1) ◽  
pp. 67-72 ◽  
Author(s):  
R. L. Wastie ◽  
G. J. Jellis ◽  
D. H. Lapwood ◽  
C. Logan ◽  
G. Little ◽  
...  
Keyword(s):  
Erwinia Carotovora ◽  
Soft Rot ◽  
Potato Cultivars ◽  
Erwinia Carotovora Subsp.Atroseptica ◽  
The Uk ◽  
Soft Rot Erwinia

Identification of stem soft rot (Erwinia carotovora subspeciesatroseptica) resistance in potato

1999 ◽  
Vol 76 (3) ◽  
pp. 137-141 ◽  
Author(s):  
Piara S. Bains ◽  
Vikram S. Bisht ◽  
Dermot R. Lynch ◽  
Lawrence M. Kawchuk ◽  
John P. Helgeson
Keyword(s):  
Erwinia Carotovora ◽  
Soft Rot ◽  
Soft Rot Erwinia

scholarly journals Use of a Pooled Transposon Mutation Grid to Demonstrate Roles in Disease Development for Erwinia carotovora subsp. atroseptica Putative Type III Secreted Effector (DspE/A) and Helper (HrpN) Proteins

2004 ◽  
Vol 17 (9) ◽  
pp. 943-950 ◽  
Author(s):  
Maria C. Holeva ◽  
Kenneth S. Bell ◽  
Lizbeth J. Hyman ◽  
Anna O. Avrova ◽  
Stephen C. Whisson ◽  
...  
Keyword(s):  
Gene Cluster ◽  
Plant Pathogens ◽  
Erwinia Carotovora ◽  
Soft Rot ◽  
Disease Development ◽  
Type Iii ◽  
Novel Approach ◽  
Related Plant ◽  
Polymerase Chain ◽  
Soft Rot Erwinia

Soft rot Erwinia spp., like other closely related plant pathogens, possess a type III secretion system (TTSS) (encoded by the hrp gene cluster) implicated in disease development. We report the sequence of the entire hrp gene cluster and adjacent dsp genes in Erwinia carotovora subsp. atroseptica SCRI1039. The cluster is similar in content and structural organization to that in E. amylovora. However, eight putative genes of unknown function located within the E. carotovora subsp. atroseptica cluster do not have homologues in the E. amylovora cluster. An arrayed set of Tn5 insertional mutants (mutation grid) was constructed and pooled to allow rapid isolation of mutants for any given gene by polymerase chain reaction screening. This novel approach was used to obtain mutations in two structural genes (hrcC and hrcV), the effector gene dspE/A, and the helper gene hrpN. An improved pathogenicity assay revealed that these mutations led to significantly reduced virulence, showing that both the putative E. carotovora subsp. atroseptica TTSS-delivered effector and helper proteins are required for potato infection.

scholarly journals Type III Secretion Contributes to the Pathogenesis of the Soft-Rot Pathogen Erwinia carotovora: Partial Characterization of the hrp Gene Cluster

2001 ◽  
Vol 14 (8) ◽  
pp. 962-968 ◽  
Author(s):  
A. Rantakari ◽  
O. Virtaharju ◽  
S. Vähämiko ◽  
S. Taira ◽  
E. T. Palva ◽  
...  
Keyword(s):  
Gene Cluster ◽  
Type Iii Secretion ◽  
Plant Pathogens ◽  
Erwinia Carotovora ◽  
Soft Rot ◽  
Hypersensitive Reaction ◽  
Virulence Determinants ◽  
Type Iii ◽  
Hrp Genes ◽  
Soft Rot Erwinia

The virulence of soft-rot Erwinia species is dependent mainly upon secreted enzymes such as pectinases, pectin lyases, and proteases that cause maceration of plant tissue. Some soft-rot Erwinia spp. also harbor genes homologous to the hypersensitive reaction and pathogenesis (hrp) gene cluster, encoding components of the type III secretion system. The hrp genes are essential virulence determinants for numerous nonmacerating gram-negative plant pathogens but their role in the virulence of soft-rot Erwinia spp. is not clear. We isolated and characterized 11 hrp genes of Erwinia carotovora subsp. carotovora. Three putative σL-dependent Hrp box promoter sequences were found. The genes were expressed when the bacteria were grown in Hrp-inducing medium. The operon structure of the hrp genes was determined by mRNA hybridization, and the results were in accordance with the location of the Hrp boxes. An E. carotovora strain with mutated hrcC, an essential hrp gene, was constructed. The hrcC¯ strain was able to multiply and cause disease in Arabidopsis, but the population kinetics were altered so that growth was delayed during the early stages of infection.

scholarly journals CONTROL OF ERWINIA CAROVORA (AROIDEAE) ON ZANTEDESCHIA

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1139b-1139
Author(s):  
Marihelen Kemp-Glass
Keyword(s):  
Erwinia Carotovora ◽  
Soft Rot ◽  
Bacterial Soft Rot ◽  
Soft Rot Erwinia

A major problem in the pot production of Zantedeschia (Calla Lillies) is the bacterial soft rot Erwinia carotovora. Sometimes if the corn is infected there may be no symptoms until the plant falls over. This disease can destroy an entire crop very quickly. Z. albomoculata, Z. Elliottiana', Z. Solfatare; and Z rehmannii were soaked for 5 minutes and 10 minute in 50 ppm and 100 ppm respectively in Agrox Strep a combination bactericide and fungicide. The 50 ppm for 5 minutes gave sufficient control of soft rot provided the plants were not overwatered. However, if overwatered the incidense of soft rot did reoccur. This was controlled by watering the plants every 10 days with 50 ppm of Agrox Strep.

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