Downy mildew of broccori caused by &lt;I&gt;Peronospora brassicae&lt;/I&gt;.

Satou, Mamoru; Hagiwara, Yasuaki; Ishii, Masayoshi; Fukumoto, Fumiyoshi

doi:10.4165/kapps1958.33.0_67

Ann. Rept. Kansai Pl. Prot.

1991

DOI: 10.4165/kapps1958.33.0_67

|View full text |Cite

Downy mildew of broccori caused by <I>Peronospora brassicae</I>.

Mamoru Satou

Yasuaki Hagiwara

Masayoshi Ishii

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1996

2008

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Downy mildew of broccoli has previously been reported in Australia, Brazil, Canada, and USA. To our knowledge, this is only the second record of a downy mildew on broccoli in East Asia, the first being from Japan in 1991 (Satou et al ., 1991). Commercial cultivation of broccoli in East Asia started in Japan in the 1980s and has expanded to Korea and China in the 2000s.…”

mentioning

confidence: 94%

First confirmed report of downy mildew caused by Hyaloperonospora parasitica on broccoli in Korea

et al. 2008

View full text Add to dashboard Cite

In January 2007, broccoli plants ( Brassica oleracea var. italica ) showing symptoms of downy mildew were found in Jeju, the chief producing area in Korea. Broccoli growers report that downy mildew is the only disease of economic importance in their greenhouses, occasionally resulting in 100% loss of yield. Initial symptoms were irregular yellow-green spots on upper leaf surfaces and white fluffy growth underneath. Floral heads developed pale brown or greyish discoloration. Systemic infections caused internal dark grey to black spots and streaks in stems and floret branches. These internal symptoms are found only in broccoli and cauliflower, not in other brassicaceous crops. A sample was deposited in the herbarium of Korea University (Acc. No. KUS-F22524). The conidiophores were hyaline, 310-520 × 10-20 μ m, monopodially branched 4-7 times. The ultimate branchlets were usually strongly curved, 20-42 μ m long, 2-3 μ m wide at the base. Conidia were hyaline and measured 23·3-31·2 × 20-27·5 μ m (length/width = 1·0-1·22). This fungus was concordant with known characteristics of Hyaloperonospora parasitica (syn. Peronospora parasitica , Constantinescu & Fatehi, 2002).The amplification and sequencing of the ITS rDNA were performed with procedures outlined by Cooke et al . (2000), and the sequence deposited in GenBank (Acc. No. EU137726). Comparison of the ITS sequences in the GenBank database revealed that it was identical to H. parasitica found on Brassica campestris (AY210985, AY210986), and shows only one base pair substitution with one on B. napus subsp. napus (AY531407, AY531409).Hyaloperonospora parasitica ( Peronospora parasitica ) has a worldwide distribution and is an important pathogen of numerous crop hosts. In Korea, H. parasitica has previously been recorded on various brassicaceous plants including Brassica rapa subsp. pekinensis and B . juncea (Cho & Shin, 2004). Due to the recent taxonomic revision of the Peronospora , this is the first confirmed record of this pathogen from broccoli. Downy mildew of broccoli has previously been reported in Australia, Brazil, Canada, and USA. To our knowledge, this is only the second record of a downy mildew on broccoli in East Asia, the first being from Japan in 1991 (Satou et al ., 1991). Commercial cultivation of broccoli in East Asia started in Japan in the 1980s and has expanded to Korea and China in the 2000s. Broccoli downy mildew appears to be spreading in Asian countries. References Division of Environmental Science and Ecological Engineering, Korea University, Seoul 136-701, KoreaChinese cabbage ( Brassica rapa ssp. pekinensis ; syn. B. pekinensis ) is the second most important vegetable in Korea after red pepper. In November 2006 seedlings in a glasshouse in Suwon, Korea, showed typical powdery mildew symptoms. Symptoms first appeared as circular to irregular white colonies, which subsequently developed into abundant growth on both leaf surfaces. Severe infections often caused leaf distortion, withering and premature senescence. Superficial mycelium and ...

show abstract

mentioning

confidence: 94%

First confirmed report of downy mildew caused by Hyaloperonospora parasitica on broccoli in Korea

et al. 2008

View full text Add to dashboard Cite

show abstract

The Host Range of Downy Mildew, Peronospora parasitica, from Brassica oleracea, Cabbage and Broccoli Crops.

Satou

Fukumoto

1996

Jpn. J. Phytopathol.

View full text Add to dashboard Cite

We collected three cabbage plants infected with Peronospora parasitica in Kagawa, two broccoli plants in Mie and one broccoli plant in Tottori. Five single spore isolates from each sample were prepared, and the host range of thirty single spore isolates in total was examined. Test plants used for the host range tests were Brassica oleracea (eighteen cultivars of cauliflower, cabbage and broccoli), B. campestris (eight cultivars of Pak-choi, mizuna, rape, Chinese cabbage and turnip), B. juncea (one cultivar of leaf mustard), B. napus (one cultivar of rutabaga) and Raphanus sativus (two cultivars of Japanese radish). In all the test plants, cotyledons with hypocotyl were used for the inoculation tests. All the B. oleracea plants except two cultivars of cabbage were highly susceptible to all the tested isolates, and it is considered that this is a host species of the fungus. B. napus was moderately susceptible, and suggested to be a possible host species. B. campestris, B. juncea and R. sativus were resistant, and considered to be non-host species. Therefore, all the isolates were considered to belong to the same strain of the fungus and the strain to be specific to B. oleracea and possibly to B. napus. Among B. oleracea plants, two cultivars of cabbage cv. Golden Best and cv. YR-Sawamidori were resistant. Difference in pathogenicity was not found among the tested single spore isolates.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Downy mildew of broccori caused by <I>Peronospora brassicae</I>.

Cited by 2 publications

References 0 publications

First confirmed report of downy mildew caused by Hyaloperonospora parasitica on broccoli in Korea

First confirmed report of downy mildew caused by Hyaloperonospora parasitica on broccoli in Korea

The Host Range of Downy Mildew, Peronospora parasitica, from Brassica oleracea, Cabbage and Broccoli Crops.

Contact Info

Product

Resources

About