Bacterial Wilt of Ryegrass in Britain.

Wilkins, P. W.; Exley, Janet K.

doi:10.1111/j.1365-3059.1977.tb01034.x

Cited by 6 publications

(4 citation statements)

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“…graminis could cause disease symptoms in 10%-^20% of the inoculated plants if no wounding of the roots occurred. WILKINS and EXLEY(1977) found about 50% infection when plant roots were cut and dipped in a bacterial suspension. No disease was noticed, inoculating the roots of Festuca pratensis Huds.…”

Section: Discussionmentioning

confidence: 99%

“…The bacterium causing this disease was found to be similar, but not identical, to Xanthomonas oryzae and was named X. graminis. Soon after, this disease was also found in Germany and France (EGLI et al 1975), Holland (LABRUYERE 1975), Britain (WILKINS and EXLEY 1977), Belgium and New Zealand (EGLI and SCHMIDT 1982). The pathogen was renamed Xanthomonas campestris pv.…”

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confidence: 96%

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Preliminary Investigations about the Mode of Transmission and Spread of Xanthomonas campestris pv. graminis on Forage Grasses

Leyns

Cleene²,

Bogaert

et al. 1988

Journal of Phytopathology

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Extensive studies showed that no disease was caused when seeds of different forage grasses were inoculated with Xanthomonas campestris pv. graminis. The disease could easily be induced by infecting the plants in the root system, leaves or flower. The inoculation site in the leaf proved to be of vital importance for the development of the disease. Wilting symptoms were quickly induced when the pathogen was inoculated near the leaf base. Plants in root‐contact with diseased plants showed disease symptoms. It is not known whether these symptoms were caused by the bacteria or by toxins released by nearby diseased plants. Cross inoculation trials on different grass varieties revealed that different pathovars exist in the group of xanthomonads, pathogenic to forage grasses. Some have a broad host range whereas others are more limited to a single plant genus. Field trials suggest that in Belgian climatic conditions, the losses caused by bacterial wilt are rather limited.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 96%

Preliminary Investigations about the Mode of Transmission and Spread of Xanthomonas campestris pv. graminis on Forage Grasses

Leyns

Cleene²,

Bogaert

et al. 1988

Journal of Phytopathology

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“…During the 1970s and 1980s, bacterial wilt was reported on many forage grasses and the causal bacteria were shown to be closely related to X . campestris identified from cereals (Egli et al , ; Wilkins and Exley, ; Roberts et al , ; Egli and Schmidt, ; Channon and Hisset, ). Those bacteria were named as different pathovars under X .…”

Section: Classification Nomenclature and Identification Of X Transmentioning

confidence: 99%

“…cerealis, hordei, secalis, translucens, and undulosa (Dye and Lelliott, 1974;Young et al, 1978;Dye et al, 1980). During the 1970s and 1980s, bacterial wilt was reported on many forage grasses and the causal bacteria were shown to be closely related to X. campestris identified from cereals (Egli et al, 1975;Wilkins and Exley, 1977;Roberts et al, 1981;Egli and Schmidt, 1982;Channon and Hisset, 1984). Those bacteria were named as different pathovars under X. campestris, including pv.…”

Section: A Ss Ific Ati On Nomen CL Ature and Identifi C Ati mentioning

confidence: 99%

The translucens group of Xanthomonas translucens: Complicated and important pathogens causing bacterial leaf streak on cereals

Sapkota

Mohamed

Liu

2020

Molecular Plant Pathology

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Xanthomonas translucens is a group of gram‐negative bacteria that can cause important diseases in cereal crops and forage grasses. Different pathovars have been defined according to their host ranges, and molecular and biochemical characteristics. Pathovars have been placed into two major groups: translucens and graminis. The translucens group contains the pathovars causing bacterial leaf streak (BLS) on cereal crops such as wheat, barley, triticale, rye, and oat. In recent years, BLS has re‐emerged as a major problem for many wheat‐ and barley‐producing areas worldwide. The biology of the pathogens and the host–pathogen interactions in cereal BLS diseases were poorly understood. However, recent genome sequence data have provided an insight into the bacterial phylogeny and identification and pathogenicity/virulence. Furthermore, identification of sources of resistance to BLS and mapping of the resistance genes have been initiated. Taxonomy Kingdom Bacteria; Phylum Proteobacteria; Class Gammaproteobacteria; Order Xanthomonadales; Family Xanthomonadaceae; Genus Xanthomonas; Species X. translucens; translucens group pathovars: undulosa, translucens, cerealis, hordei, and secalis; graminis group pathovars: arrhenatheri, graminis, poae, phlei; newly established pathovar: pistaciae. Host range X. translucens mainly infects plant species in the Poaceae with the translucens group on cereal crop species and the graminis group on forage grass species. However, some strains have been isolated from, and are able to infect, ornamental asparagus and pistachio trees. Most pathovars have a narrow host range, while a few can infect a broad range of hosts. Genome The complete genome sequence is available for two X. translucens pv. undulosa strains and one pv. translucens strain. A draft genome sequence is also available for at least one strain from each pathovar. The X. translucens pv. undulosa strain Xt4699 was the first to have its complete genome sequenced, which consists of 4,561,137 bp with total GC content approximately at 68% and 3,528 predicted genes. Virulence mechanisms Like most xanthomonads, X. translucens utilizes a type III secretion system (T3SS) to deliver a suite of T3SS effectors (T3Es) inside plant cells. Transcription activator‐like effectors, a special group of T3Es, have been identified in most of the X. translucens genomes, some of which have been implicated in virulence. Genetic factors determining host range virulence have also been identified.

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The hosts of Xanthomonas

Hayward

1993

Xanthomonas

116

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Bacterial Wilt of Ryegrass in Britain.

Cited by 6 publications

References 0 publications

Preliminary Investigations about the Mode of Transmission and Spread of Xanthomonas campestris pv. graminis on Forage Grasses

Preliminary Investigations about the Mode of Transmission and Spread of Xanthomonas campestris pv. graminis on Forage Grasses

The translucens group of Xanthomonas translucens: Complicated and important pathogens causing bacterial leaf streak on cereals

The hosts of Xanthomonas

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