SCREENING OF PLANT EXTRACTS ON GROWTH PARAMETERS OF TWO ASPERGILLUS SECTION FLAVI TOXIGENIC STRAINS

2021 ◽  
pp. 44-56
Author(s):  
Mariana Paiva Rodrigues ◽  
Tatiana Xavier de Almeida ◽  
Águida Aparecida de Oliveira ◽  
Gabriela Lago Biscoto ◽  
Raul Roque de Souza Dias ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Growth Parameters ◽  
Aspergillus Section Flavi ◽  
Toxigenic Strains ◽  
Aspergillus Section

scholarly journals Influence of a glyphosate-based herbicide on growth parameters and aflatoxin B1 production by Aspergillus section Flavi on maize grains

2020 ◽  
Author(s):  
Nicolás Benito ◽  
Karen Magnoli ◽  
Cecilia Soledad Carranza ◽  
Melisa Eglé Aluffi ◽  
Carina Elizabeth Magnoli ◽  
...  
Keyword(s):  
Aflatoxin B1 ◽  
Growth Parameters ◽  
Aspergillus Section Flavi ◽  
Aspergillus Section

Prevalence of Aspergillus species on selected Colombian animal feedstuffs and ability of Aspergillus section Flavi to produce aflatoxins

2009 ◽  
Vol 2 (1) ◽  
pp. 31-34 ◽  
Author(s):  
G. Diaz ◽  
M. Lozano ◽  
A. Acuña
Keyword(s):  
Liquid Chromatography ◽  
Cottonseed Meal ◽  
Sunflower Seed ◽  
Seed Meal ◽  
Aspergillus Section Flavi ◽  
Wheat Middlings ◽  
Highperformance Liquid Chromatography ◽  
Animal Feedstuffs ◽  
Aflatoxin B ◽  
Aspergillus Section

A total of 57 samples of feedstuffs commonly used for animal nutrition in Colombia (maize, soybean, sorghum, cottonseed meal, sunflower seed meal, wheat middlings and rice) were analysed for Aspergillus contamination. Aspergillus fungi were identified at species level and their ability to produce aflatoxins was determined by highperformance liquid chromatography. A total of 31 of the feedstuffs analysed (54.4%) were found to contain Aspergillus spp. The most contaminated substrate was maize (100%) followed by cottonseed meal (80%), sorghum (60%) and wheat middlings (60%). Soybean showed lower levels of contamination (10%). No Aspergillus spp. could be isolated from rice or sunflower seed meal. Total Aspergillus strains isolated were 50, with 28 belonging to section Flavi (56%), 17 to section Nigri (34%), 4 to section Circumdati (8%) and 1 to section Fumigati (2%). Among section Flavi, 17 isolates were identified as A. flavus, seven as A. parasiticus, two as A. oryzae and two as A. tamarii. Production of aflatoxins by Aspergillus section Flavi was screened by liquid chromatography. About three quarters of the A. flavus strains (76.5%) produced aflatoxin B1 (0.2 to 240.4 µg/g) and aflatoxin B2 (0.2 to 1.6 µg/g), while all A. parasiticus strains produced the four naturally occurring aflatoxins (aflatoxin B1 from 0.6 to 83.5 µg/g, aflatoxin B2 from 0.3 to 4.8 µg/g, aflatoxin G1 from 0.4 to 19.3 µg/g and aflatoxin G2 from 0.1 to 1.0 µg/g). This is the first study demonstrating the presence of highly toxigenic Aspergillus fungi in Colombian animal feedstuffs.

Natural maize phytochemicals for control of maize mycoflora and aflatoxigenic fungi

2009 ◽  
Vol 2 (3) ◽  
pp. 305-312 ◽  
Author(s):  
A. Nesci ◽  
S. Marín ◽  
M. Etcheverry ◽  
V. Sanchis
Keyword(s):  
Ferulic Acid ◽  
Incubation Period ◽  
Cinnamic Acid ◽  
Inhibitory Effect ◽  
Aspergillus Section Flavi ◽  
Aflatoxigenic Fungi ◽  
Incubation Periods ◽  
Maize Grain ◽  
Aflatoxin B ◽  
Aspergillus Section

This research was undertaken to evaluate the effects of the natural phytochemicals trans-cinnamic acid (CA) alone at concentrations of 20 and 25 mM, ferulic acid (FA) at concentration of 30 mM and two mixtures, CA-FA (20+30 mM) and CA-FA (25+30 mM) on natural maize mycoflora, Aspergillus section Flavi population and aflatoxin B1 production. These studies were carried out in maize grain in relation to a water activity of 0.99, 0.97 and 0.94. CA at 25 mM and the mixture CA-FA (25+30 mM) were the most effective treatments at inhibiting natural maize mycoflora at all aw assayed after 11 and 35 days of incubation at 25 °C. In general, 20 mM CA caused complete inhibition of Aspergillus section Flavi population at all aw values tested during all incubation period without an additional inoculum. 20 mM CA and 25 mM CA showed the major inhibitory effect on aflatoxin B1 accumulation of control and Aspergillus section Flavi additionally inoculated during all incubation periods. The data showed that CA and FA could be considered as effective fungitoxicants for natural maize mycoflora and aflatoxigenic fungi in the aw range 0.99 to 0.94. The information obtained shows promise for controlling aflatoxigenic fungi in stored maize.

scholarly journals Aflatoxin B and G contamination in imported peanuts and Aspergillus section Flavi of the causing fungi

2008 ◽  
Vol 58 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Kiyoshi OKANO ◽  
Tsuneyoshi TOMITA ◽  
Yuko KUMEDA ◽  
Keiko MATSUMARU ◽  
Masakatsu ICHINOE
Keyword(s):  
Aspergillus Section Flavi ◽  
Aflatoxin B ◽  
Aspergillus Section

Aspergillus pseudotamarii, a new aflatoxin producing species in Aspergillus section Flavi

2001 ◽  
Vol 105 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Yoko Ito ◽  
Stephen W. Peterson ◽  
Donald T. Wicklow ◽  
Tetsuhisa Goto
Keyword(s):  
Aspergillus Section Flavi ◽  
Aspergillus Section
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