Reduction of brown blotch disease and tyrosinase activity in Agaricus bisporus infected by Pseudomonas tolaasii upon treatment with endofungal bacteria

2020 ◽  
Vol 110 ◽  
pp. 101474 ◽  
Author(s):  
Samira Ghasemi ◽  
Behrouz Harighi ◽  
Abdolbaset Azizi ◽  
Mahdi Mojarrab
Keyword(s):  
Agaricus Bisporus ◽  
Tyrosinase Activity ◽  
Pseudomonas Tolaasii ◽  
Brown Blotch ◽  
Brown Blotch Disease

Characterization of bacteriophage ϕPto-bp6g, a novel phage that lyses Pseudomonas tolaasii causing brown blotch disease in mushrooms

2012 ◽  
Vol 91 (3) ◽  
pp. 514-519 ◽  
Author(s):  
Hanh Thi Dieu Nguyen ◽  
Soojin Yoon ◽  
Min-Hee Kim ◽  
Young-Kee Kim ◽  
Moon-Young Yoon ◽  
...  
Keyword(s):  
Pseudomonas Tolaasii ◽  
Brown Blotch ◽  
Brown Blotch Disease

scholarly journals Resistance Sources to Brown Blotch Disease (Pseudomonas tolaasii) in a Diverse Collection of Pleurotus Mushroom Strains

Pathogens ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 227 ◽  
Author(s):  
Benjamin Azu Okorley ◽  
Frederick Leo Sossah ◽  
Dan Dai ◽  
Shuai Xu ◽  
Zhenghui Liu ◽  
...  
Keyword(s):  
Pseudomonas Tolaasii ◽  
Resistance Sources ◽  
Controlled Conditions ◽  
Resistant Strains ◽  
Brown Blotch ◽  
Brown Blotch Disease ◽  
Moderately Resistant

Brown blotch disease (BBD) caused by Pseudomonas tolaasii is one of the most devastating diseases of Pleurotus spp. worldwide. Breeding for resistant strains is the most effective method for controlling BBD. To identify resistant germplasm for BBD management, 97 strains comprising 21 P. cf. floridanus, 20 P. ostreatus, and 56 P. pulmonarius were screened by two different methods; namely, inoculation of the pathogen on the mushroom pileus (IMP) and on the spawned substrate (IMSS) under controlled conditions. Out of the 97 strains screened, 22 P. pulmonarius, and four P. cf. floridanus were moderately resistant to BBD using the IMP method. Eleven P. pulmonarius, six P. cf. florida, and one P. ostreatus strains were highly resistant to BBD using the IMSS method. All of the 97 strains showed varying degrees of susceptibility using the IMP method, but eight strains were completely resistant using the IMSS method. Combining these two methods, five strains were highly resistant (four P. pulmonarius and one P. cf. floridanus) and 11 were moderately resistant (eight P. pulmonarius and three P. cf. floridanus). The resistance sources to P. tolaasii identified in P. pulmonarius and P. cf. floridanus could be used for further breeding of Pleurotus spp.

scholarly journals Visible-Near Infrared Hyperspectral Imaging for the Identification and Discrimination of Brown Blotch Disease on Mushroom (Agaricus Bisporus) Caps

2010 ◽  
Vol 18 (5) ◽  
pp. 341-353 ◽  
Author(s):  
Edurne Gaston ◽  
Jesús M. Frías ◽  
Patrick J. Cullen ◽  
Colm P. O'Donnell ◽  
Aoife A. Gowen
Keyword(s):  
Hyperspectral Imaging ◽  
Agaricus Bisporus ◽  
Near Infrared ◽  
Brown Blotch ◽  
Brown Blotch Disease

scholarly journals Application of Siderotyping for Characterization of Pseudomonas tolaasii and “Pseudomonas reactans” Isolates Associated with Brown Blotch Disease of Cultivated Mushrooms

2000 ◽  
Vol 66 (11) ◽  
pp. 4834-4841 ◽  
Author(s):  
Patricia Munsch ◽  
Valerie A. Geoffroy ◽  
Tapani Alatossava ◽  
Jean-Marie Meyer
Keyword(s):  
Isoelectric Focusing ◽  
Agaricus Bisporus ◽  
White Line ◽  
Disease Symptoms ◽  
Line Test ◽  
Brown Blotch ◽  
Uptake Studies ◽  
Brown Blotch Disease ◽  
Reference Strains

ABSTRACT Pyoverdine isoelectric focusing analysis and pyoverdine-mediated iron uptake were used as siderotyping methods to analyze a collection of 57 northern and central European isolates of P. tolaasiiand “P. reactans.” The bacteria, isolated from cultivated Agaricus bisporus or Pleurotus ostreatus mushroom sporophores presenting brown blotch disease symptoms, were identified according to the white line test (W. C. Wong and T. F. Preece, J. Appl. Bacteriol. 47:401–407, 1979) and their pathogenicity towards A. bisporus and were grouped into siderovars according to the type of pyoverdine they produced. Seventeen P. tolaasii isolates were recognized, which divided into two siderovars, with the first one containing reference strains and isolates of various geographical origins while the second one contained Finnish isolates exclusively. The 40 “P. reactans” isolates divided into eight siderovars. Pyoverdine isoelectric focusing profiles and cross-uptake studies demonstrated an identity for some “P. reactans” isolates, with reference strains belonging to theP. fluorescens biovars II, III, or V. Thus, the easy and rapid methods of siderotyping proved to be reliable by supporting and strengthening previous taxonomical data. Moreover, two potentially novel pyoverdines characterizing one P. tolaasiisiderovar and one “P. reactans” siderovar were found.

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