Bremia lactucae
TaxID: 4779
Basic Information
Bremia lactucae
Lettuce Downy Mildew, lettuce downy mildew
Bremia lactucae is a plant pathogen. This microorganism causes a disease of lettuce (Lactuca sativa) denominated as downy mildew. Some other strains can be found on 36 genera of Asteraceae including Senecio and Sonchus. Experiments using sporangia from hosts do not infect lettuce and it is concluded that the fungus exists as a quantity of host-specific strains (formae speciales). Wild species, such as Lactuca serriola, or varieties of Lactuca can hold strains that infect lettuce, but these pathogens are not sufficiently common to seriously infect the plant. The severity of damage caused by Bremia can vary depending on environmental conditions. High humidity and cool temperatures are optimal for infection and spread of the disease. Lettuce that is infected with downy mildew causes the plant to become more susceptible for other pathogens. The infected leaf tissue can serve as an entry for secondary infection, particularly to pathogens that cause soft rots such as, Botrytis cinerea. The plant can suffer systemic infections. Metalaxyl is effective against this microorganism. The most effective management practice of downy mildew is to use resistant cultivars of Lettuce. Using an irrigation system that is in the ground as opposed to a sprinkler system reduces leaf wetness, which is favorable for infection. Other practices include removing infected plant debris from soil and application of fungicide.
from Wikipedia
Taxonomic Information
Eukaryota
Oomycota
Peronosporomycetes
Peronosporales
Peronosporaceae
Bremia
lactucae
Undefined
Species
nan
d__Eukaryota;p__Oomycota;c__Peronosporomycetes;o__Peronosporales;f__Peronosporaceae;g__Bremia;s__Bremia lactucae
nan
Fungal organisms
Photos (5 photos)
Morphological Features
No morphological description available.
Host Plants (0 host plants)
Data sources: EPPO Global Database and relevant literature.
No host plants available.
Quarantine Status (6 records)
Data sources: IPPC website and national quarantine websites; verified by human review.
| Country | Status | Year Added |
|---|---|---|
| Angola | Quarantine pests | — |
| Mexico | Quarantine pests | — |
| Nicaragua | Absent | — |
| Sao Tome and Principe | Quarantine pests | — |
| Seychelles | Quarantine pests | — |
| United States of America | Quarantine pests | — |
Distribution (76 countries)
Data Sources: EPPO Global Database and GBIF.
| Country | Status | State |
|---|---|---|
| Algeria | Present | — |
| Argentina | Present | — |
| Australia | Present | |
| Austria | Present | — |
| Belgium | Present | — |
| Bulgaria | Present | — |
| Bermuda | Present | — |
| Brazil | Present | |
| Canada | Present | |
| Switzerland | Present | — |
Distribution Map (Latitude and longitude coordinates sourced from GBIF.)
Download CSVGenomes (1 records)
Data source: NCBI.
| Assembly Accession | Assembly Level | Genome Size(Mb) | Contig N50(Kb) | Scaffold N50(Kb) | BUSCO% | Downloads | Actions |
|---|---|---|---|---|---|---|---|
| GCF_004359215.1 | Chromosome | 115 | 28 | 5324 | - |
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BlacSF5v2 |
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Transcriptomes (3 records)
Data source: NCBI.
| Run ID | Tissue | Developmental Stage | Sex | Read Count | Location | Actions |
|---|---|---|---|---|---|---|
| SRR8606627 | - | - | - | 55535422 | Finland | |
|
PRJNA523226 SRX5406065 SRP186518 general RNAseq of Bremia lactucae isolate SF5 infecting Lactuca sativa cultivar Cobham Green. L. sativa Cobham Green cotelydons infected with B. lactucae isolate SF5 collected, cDNA was generated by protocol developed by Zhong et al. 2011 except cDNA was fragmented instead of mRNA. SF5 {'host': 'Lactuca sativa', 'isolate': 'SF5', 'lab_host': 'Lactuca sativa', 'env_biome': 'Laboratory infection timecourse', 'sample_type': 'mixed culture', 'geo_loc_name': 'Finland', 'biosamplemodel': 'Microbe, viral or environmental', 'collected_batch': '048', 'collection_date': '1975', 'host_tissue_sampled': 'Seedling', 'biomaterial_provider': 'Michelmore Lab, UCD'} |
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| SRR8606626 | - | - | - | 70757230 | Finland | |
|
PRJNA523226 SRX5406066 SRP186518 general RNAseq of Bremia lactucae isolate SF5 infecting Lactuca sativa cultivar Cobham Green. L. sativa Cobham Green cotelydons infected with B. lactucae isolate SF5 collected, cDNA was generated by protocol developed by Zhong et al. 2011 except cDNA was fragmented instead of mRNA. SF5 {'host': 'Lactuca sativa', 'isolate': 'SF5', 'lab_host': 'Lactuca sativa', 'env_biome': 'Laboratory infection timecourse', 'sample_type': 'mixed culture', 'geo_loc_name': 'Finland', 'biosamplemodel': 'Microbe, viral or environmental', 'collected_batch': '024', 'collection_date': '1975', 'host_tissue_sampled': 'Seedling', 'biomaterial_provider': 'Michelmore Lab, UCD'} |
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| SRR8606625 | - | - | - | 161350768 | Finland | |
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PRJNA523226 SRX5406067 SRP186518 general RNAseq of Bremia lactucae isolate SF5 infecting Lactuca sativa cultivar Cobham Green. L. sativa Cobham Green cotelydons infected with B. lactucae isolate SF5 collected, cDNA was generated by protocol developed by Zhong et al. 2011 except cDNA was fragmented instead of mRNA. SF5 {'host': 'Lactuca sativa', 'isolate': 'SF5', 'lab_host': 'Lactuca sativa', 'env_biome': 'Laboratory infection timecourse', 'sample_type': 'mixed culture', 'geo_loc_name': 'Finland', 'biosamplemodel': 'Microbe, viral or environmental', 'collected_batch': '048', 'collection_date': '1975', 'host_tissue_sampled': 'Seedling', 'biomaterial_provider': 'Michelmore Lab, UCD'} |
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Literature
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