Effect of environmental factors on tenuazonic acid production by Alternaria alternata on soybean-based media

2009 ◽  
Vol 107 (4) ◽  
pp. 1186-1192 ◽  
Author(s):  
M.S. Oviedo ◽  
M.L. Ramirez ◽  
G.G. Barros ◽  
S.N. Chulze
Keyword(s):  
Environmental Factors ◽  
Alternaria Alternata ◽  
Acid Production ◽  
Tenuazonic Acid

scholarly journals Tenuazonic acid: a promising antitubercular principle from Alternaria alternate

2011 ◽  
Vol 2 (1) ◽  
pp. 17 ◽  
Author(s):  
Visalakchi Sonaimuthu ◽  
Swati Parihar ◽  
Jay Prakash Thakur ◽  
Suaib Luqman ◽  
Dharmendra Saikia ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Alternaria Alternata ◽  
Active Metabolite ◽  
Antitubercular Activity ◽  
Model System ◽  
Human Erythrocytes ◽  
Tenuazonic Acid ◽  
Fungal Metabolite ◽  
Osmotic Hemolysis ◽  
Alternaria Alternate

Bioactivity guided isolation of dichloromethane extract of <em>Alternaria alternata</em> identified tenuazonic acid (1) as potentially active against <em>Mycobacterium tuberculosis</em> H37Rv, MIC at 250 μg/mL concentration. This active metabolite 1, was also evaluated for osmotic hemolysis using the erythrocyte as a model system. It was observed that this fungal metabolite showing antitubercular activity exhibited concentration dependent toxicity to human erythrocytes.

scholarly journals Mycovirus-Induced Tenuazonic Acid Production in a Rice Blast Fungus Magnaporthe oryzae

2020 ◽  
Vol 11 ◽  
Author(s):  
Akihiro Ninomiya ◽  
Syun-ichi Urayama ◽  
Rei Suo ◽  
Shiro Itoi ◽  
Shin-ichi Fuji ◽  
...  
Keyword(s):  
Magnaporthe Oryzae ◽  
Acid Production ◽  
Rice Blast ◽  
Rice Blast Fungus ◽  
Tenuazonic Acid ◽  
Blast Fungus

Incidence of Mycotoxigenic Alternaria alternata and Aspergillus flavus in Barley

1993 ◽  
Vol 56 (3) ◽  
pp. 246-248 ◽  
Author(s):  
V. SANCHIS ◽  
A. SANCLEMENTE ◽  
J. USALL ◽  
I. VIÑAS
Keyword(s):  
Aspergillus Flavus ◽  
Alternaria Alternata ◽  
Monomethyl Ether ◽  
Fungal Species ◽  
Tenuazonic Acid ◽  
Alternariol Monomethyl Ether ◽  
Penicillium Spp

The predominant fungal species present in 60 samples of barley collected in Spain were Alternaria alternata, Penicillium spp. and Aspergillus flavus. Of the 176 Alternaria isolates examined, 88.6% produced tenuazonic acid, 15.3% produced alternariol, and 9% produced alternariol monomethyl ether. Only 6% of the 190 isolates of A. flavus produced aflatoxin.

Alternaria toxins in weather-damaged wheat and sorghum in the 1995-1996 Australian harvest

1997 ◽  
Vol 48 (8) ◽  
pp. 1249 ◽  
Author(s):  
D. J. Webley ◽  
K. L. Jackson ◽  
J. D. Mullins ◽  
A. D. Hocking ◽  
J. I. Pitt
Keyword(s):  
Alternaria Alternata ◽  
Primary Infection ◽  
New South ◽  
Geographical Location ◽  
Monomethyl Ether ◽  
The Other ◽  
Tenuazonic Acid ◽  
Alternariol Monomethyl Ether ◽  
South Wales ◽  
Low Levels

Weather-damaged wheat from northern New South Wales in 1995-96 was heavily infected with the fungus Alternaria alternata. The mycotoxins tenuazonic acid, alternariol, and alternariol monomethyl ether were detected at low levels which corresponded with the degree of A. alternata infection and the geographical location. Sorghum and undamaged wheat from the same region also showed moderate levels of A. alternata infection and low levels of tenuazonic acid but none of the other toxins. These mycotoxins were not found in weather-damaged wheat from other areas of Australia where the primary infection was by A. infectoria rather than A. alternata.

Tenuazonic acid production is dispensable for virulence, but its biosynthetic gene expression pattern is associated with the infection of Pyricularia oryzae

2021 ◽  
Author(s):  
Takeshi Kashiwa ◽  
Takayuki Motoyama ◽  
Kazuko Yoshida ◽  
Choong-Soo Yun ◽  
Hiroyuki Osada
Keyword(s):  
Gene Expression ◽  
Expression Pattern ◽  
Acid Production ◽  
Rice Blast ◽  
Gene Expression Pattern ◽  
Rice Blast Fungus ◽  
Pyricularia Oryzae ◽  
Biosynthetic Gene ◽  
Tenuazonic Acid ◽  
Biosynthetic Gene Expression

Abstract Tenuazonic acid (TeA) is a toxin produced by the rice blast fungus Pyricularia oryzae. Although knockout of the TeA biosynthetic gene TAS1 did not affect the virulence of P. oryzae, constitutive TAS1 expression suppressed its infection. TAS1 expression was induced alongside transition of P. oryzae infection behavior. The results suggested that controlling TeA biosynthesis is important for P. oryzae infection.

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