SEQUENCE ANALYSIS OF TWO GENOMIC REGIONS OF LEPTOSPHAERIA MACULANS, THE FUNGUS THAT CAUSES BLACKLEG DISEASE (PHOMA STEM CANKER) OF BRASSICA NAPUS

2006 ◽  
pp. 55-62
Author(s):  
B.J. Howlett ◽  
D.M. Gardiner ◽  
A.J. Cozijnsen ◽  
L.M. Wilson ◽  
L. Cattolico ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Sequence Analysis ◽  
Leptosphaeria Maculans ◽  
Stem Canker ◽  
Blackleg Disease ◽  
Phoma Stem Canker ◽  
Genomic Regions

scholarly journals Mycovirus-Induced Hypervirulence of Leptosphaeria biglobosa Enhances Systemic Acquired Resistance to Leptosphaeria maculans in Brassica napus

2020 ◽  
Vol 33 (1) ◽  
pp. 98-107 ◽  
Author(s):  
Unnati A. Shah ◽  
Ioly Kotta-Loizou ◽  
Bruce D. L. Fitt ◽  
Robert H. A. Coutts
Keyword(s):  
Brassica Napus ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Leptosphaeria Maculans ◽  
Stem Canker ◽  
Systemic Resistance ◽  
Phoma Stem Canker ◽  
Isogenic Lines ◽  
Related Proteins ◽  
Leptosphaeria Biglobosa

Phoma stem canker (blackleg) is one of the most important diseases of winter oilseed rape (Brassica napus) worldwide and is caused by a complex that comprises at least two species: Leptosphaeria maculans and L. biglobosa. Screening a panel of field Leptosphaeria isolates from B. napus for the presence of mycoviruses revealed the presence of a novel double-stranded RNA quadrivirus in L. biglobosa and no viruses in L. maculans. Following elimination of the mycovirus, virus-infected and virus-free isogenic lines of L. biglobosa were created. A direct comparison of the growth and virulence of these isogenic lines illustrated that virus infection caused hypervirulence and resulted in induced systemic resistance toward L. maculans in B. napus following lower leaf preinoculation with the virus-infected isolate. Analysis of the plant transcriptome suggests that the presence of the virus leads to subtle alterations in metabolism and plant defenses. For instance, transcripts involved in carbohydrate and amino acid metabolism are enriched in plants treated with the virus-infected isolate, while pathogenesis-related proteins, chitinases and WRKY transcription factors are differentially expressed. These results illustrate the potential for deliberate inoculation of plants with hypervirulent L. biglobosa to decrease the severity of Phoma stem canker later in the growing season. [Formula: see text] Copyright © 2020 The Author(s). This is an open access article distributed under the CC BY 4.0 International license .

Geographic variation in severity of phoma stem canker and Leptosphaeria maculans/ L. biglobosa populations on UK winter oilseed rape (Brassica napus)

2009 ◽  
Vol 126 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Jenna F. Stonard ◽  
Akinwunmi O. Latunde-Dada ◽  
Yong-Ju Huang ◽  
Jonathan S. West ◽  
Neal Evans ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Geographic Variation ◽  
Oilseed Rape ◽  
Leptosphaeria Maculans ◽  
Stem Canker ◽  
Winter Oilseed Rape ◽  
Phoma Stem Canker

scholarly journals Effects of fungicide on growth of Leptosphaeria maculans and L. biglobosa in relation to development of phoma stem canker on oilseed rape (Brassica napus)

2011 ◽  
Vol 60 (4) ◽  
pp. 607-620 ◽  
Author(s):  
Y. J. Huang ◽  
J. R. Hood ◽  
M. R. Eckert ◽  
J. F. Stonard ◽  
H. J. Cools ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Leptosphaeria Maculans ◽  
Stem Canker ◽  
Phoma Stem Canker
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