scholarly journals Badania nad plamistością łodyg łubinu powodowaną przez Phomopsis leptostromiformis (Kühn) Bubak [Studies on the Patchiness of Lupine Stems Caused by Phomopsis leptostromiformis (Kühn) Bubak]

2017 ◽  
Vol 6 (1) ◽  
pp. 117-143 ◽  
Author(s):  
J. Kochman
Keyword(s):  
Phomopsis Leptostromiformis

Structure elucidation and absolute configuration of phomopsin a, a hexapeptide mycotoxin produced by phomopsis leptostromiformis

Tetrahedron ◽  
1989 ◽  
Vol 45 (8) ◽  
pp. 2351-2372 ◽  
Author(s):  
Claude C.J. Culvenor ◽  
John A. Edgar ◽  
Maureen F. Mackay ◽  
Charles P. Gorst-Allman ◽  
Walter F.O. Marasas ◽  
...  
Keyword(s):  
Absolute Configuration ◽  
Structure Elucidation ◽  
Phomopsis Leptostromiformis

Bioassay of the contamination of lupin seed by the mycotoxin phomopsin

1985 ◽  
Vol 25 (2) ◽  
pp. 434 ◽  
Author(s):  
DS Petterson ◽  
JE Peterson ◽  
LW Smith ◽  
PM Wood ◽  
CCJ Culvenor
Keyword(s):  
Causative Agent ◽  
Western Australia ◽  
Infection Level ◽  
Lupin Seed ◽  
Low Concentrations ◽  
Phomopsis Leptostromiformis ◽  
Good Agreement

Samples of seed from commercial crops of Lupinus spp. in three States were tested for the presence of phomopsin, the causative agent of lupinosis. Each of 43 samples was tested in one of two laboratories using a nursling rat bioassay, and 12 of these were tested in both. Factors that could affect reproducibility of the assay were examined. There was good agreement in assessments of toxicity between laboratories. The efficiency of extraction was found to vary from about 15% at low concentrations of phomopsin to no more than 60%. Phomopsin was detected in 17 of the 43 samples, at levels ranging from < 6 �g/kg to 360 �g/kg. Phomopsis leptostromiformis infection was detected in 25 of 31 samples of seed from Western Australia, the highest infection level being 18%. The highest levels of phomopsin were found in samples with more than 8% infection.

The effect of environment on level of resistance to Phomopsis leptostromiformis in lupins and implications for resistance breeding to this disease

Euphytica ◽  
1984 ◽  
Vol 33 (2) ◽  
pp. 443-446
Author(s):  
J. Hamblin ◽  
P. McR. Wood ◽  
C. Edwards
Keyword(s):  
Resistance Breeding ◽  
Phomopsis Leptostromiformis

scholarly journals Growth and toxin production of phomopsin A and ochratoxin A forming fungi under different storage conditions in a pea (Pisum sativum) model system

2021 ◽  
Author(s):  
Birgitta Maria Kunz ◽  
Laura Pförtner ◽  
Stefan Weigel ◽  
Sascha Rohn ◽  
Anselm Lehmacher ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Water Activity ◽  
Fungal Growth ◽  
Toxin Production ◽  
Storage Conditions ◽  
Grain Legumes ◽  
Model System ◽  
Relative Air Humidity ◽  
Phomopsis Leptostromiformis ◽  
Elevated Water

AbstractPhomopsins are mycotoxins mainly infesting lupines, with phomopsin A (PHOA) being the main mycotoxin. PHOA is produced by Diaporthe toxica, formerly assigned as toxigenic Phomopsis leptostromiformis, causing infections in lupine plants and harvested seeds. However, Diaporthe species may also grow on other grain legumes, similar to Aspergillus westerdijkiae as an especially potent ochratoxin A (OTA) producer. Formation of PHOA and OTA was investigated on whole field peas as model system to assess fungal growth and toxin production at adverse storage conditions. Field pea samples were inoculated with the two fungal strains at two water activity (aw) values of 0.94 and 0.98 and three different levels of 30, 50, and 80% relative air humidity.After 14 days at an aw value of 0.98, the fungi produced 4.49 to 34.3 mg/kg PHOA and 1.44 to 3.35 g/kg OTA, respectively. Strains of D. toxica also tested showed higher PHOA concentrations of 28.3 to 32.4 mg/kg.D. toxica strains did not grow or produce PHOA at an aw values of 0.94, while A. westerdijkiae still showed growth and OTA production.Elevated water activity has a major impact both on OTA and, even more pronouncedly, on PHOA formation and thus, proper drying and storage of lupins as well as other grain legumes is crucial for product safety.

scholarly journals Patogenic fungi associated with blue lupine seeds

2013 ◽  
Vol 48 (2) ◽  
pp. 59-64 ◽  
Author(s):  
Bogdan Nowicki
Keyword(s):  
Botrytis Cinerea ◽  
Sclerotinia Sclerotiorum ◽  
Fusarium Avenaceum ◽  
Pathogenic Species ◽  
Highly Pathogenic ◽  
Stemphylium Botryosum ◽  
Phomopsis Leptostromiformis ◽  
Fusarium Semitectum

Over 10% ofseeds harvested in 1991 and 1992 (50 samples, 400 seeds in each sample) proved to be infested with various fungi. <em>Fusarium</em> spp. and <em>Botrytis cinerea</em> were the most common pathogens isolated. <em>Fusarium avenaceum</em> was the most common and highIy pathogenic species. <em>Fusarium semitectum</em> and <em>F. tricinctum</em> were highly pathogenic to lupin seedlings but they were the least common <em>Fusarium</em> isolated from seeds. Similarily, <em>Sclerotinia sclerotiorum</em> was isolated only from 0,2% seeds tested but this fungus was highly pathogenic to lupin seedlings. Some other fungi know as lupin pathogens (<em>F. oxysporum, Stemphylium botryosum, Pleiochaeta setosa</em> and <em>Phomopsis leptostromiformis</em>) were also noted in tested seeds.

Phomopsis Leptostromiformis: The Causal Fungus of Lupinosis, a Mycotoxicosis, in Sheep

Mycologia ◽  
1972 ◽  
Vol 64 (2) ◽  
pp. 316-324 ◽  
Author(s):  
K. T. van Warmelo ◽  
W. F. O. Marasas
Keyword(s):  
Phomopsis Leptostromiformis ◽  
Causal Fungus

A standard technique for detecting seed transmitted Phomopsis leptostromiformis of lupins and for testing commercial seed in South Australia

1982 ◽  
Vol 22 (116) ◽  
pp. 190 ◽  
Author(s):  
SM Ali ◽  
J Paterson ◽  
J Crosby
Keyword(s):  
Confidence Intervals ◽  
Microscopic Examination ◽  
Agar Plate ◽  
South Australia ◽  
Standard Technique ◽  
Plate Method ◽  
Lupin Seed ◽  
Commercial Seed ◽  
Phomopsis Leptostromiformis ◽  
Agar Media

A standard agar plate method was tested for its ability to detect Phomopsis leptostromiformis on lupin seed. It proved to be reliable. The 95% confidence intervals of Phomopsis level of five seed samples were 13.2-1 5.8, 13.2-1 5.5, 15.4-1 7.9, 13.2-1 4.8 and 15.6-1 8.0. The characteristic colony produced by Phomopsis infected seeds on agar media was confirmed by microscopic examination for accuracy of detection and no exception was observed. The method is described in detail. The method was then used in a two year survey of 160 samples of commercial lupin seed from all parts of South Australia. The percentage of seed infected in these samples ranged from 0-20% and only 13% of the samples were free of P. leptostromiformis.

A survey of Phomopsis leptostromiformis infection of lupin seed in Western Australia: 1976-81

1985 ◽  
Vol 25 (1) ◽  
pp. 164 ◽  
Author(s):  
PM Wood ◽  
DS Petterson
Keyword(s):  
Western Australia ◽  
Animal Husbandry ◽  
Australian Journal ◽  
Infection Level ◽  
Lupin Seed ◽  
Phomopsis Leptostromiformis

Samples of seed from commercial crops of Lupinus spp. in Western Australia were tested over a 6-year period (1976-8 1) for levels of infection by Phomopsis leptostromiformis. Of the 584 samples tested, 49% were not infected and a further 43% had <4% infection. Overall the levels of infection were higher than those previously recorded in this State. There was a highly significant effect of rainfall zone (P<0.001) on infection level. After accounting for this, there was no significant effect of cultivar, year, or growing zone. The method used was compared with that of Ali et al. (Australian Journal of Experimental Agriculture and Animal Husbandry, 1982, 22, 190-3). No significant differences between the two methods in assessment of lupin seed were observed.

Experimental Evidence that Lupinosis of Sheep Is A Mycotoxicosis Caused by the Fungus Phomopsis Leptostromiformis (Kühn) Bubák

1971 ◽  
pp. 185-193
Author(s):  
K. T. van Warmelo ◽  
W. F. O. Marasas ◽  
T. F. Adelaar ◽  
T. S. Kellerman ◽  
I. B. J. van Rensburg ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Phomopsis Leptostromiformis

Infraspecific variation demonstrated in Phomopsis leptostromiformis using cultural and biochemical techniques

1991 ◽  
Vol 95 (3) ◽  
pp. 320-323 ◽  
Author(s):  
R.G. Shivas ◽  
J.G. Allen ◽  
P.M. Williamson
Keyword(s):  
Infraspecific Variation ◽  
Phomopsis Leptostromiformis
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