Abstract
Deoxynivalenol (DON) is a well-known mycotoxin, responsible for outbreaks of gastrointestinal disorders in Japan. Fusarium graminearum, a parasite of cereal crops, produces this toxin and this is one of the reasons why it is important to understand its metabolism. It is possible to predict the mold’s color change and the quantity of DON synthesized throughout its lifecycle. Furthermore, aw has been found to affect the amount of DON. This study aimed to analyze the potential of F. graminearum surface color as a predictor of DON concentration at aw = 0.94, 0.97, and 0.99. Thus, 36 specimens were incubated at 25 °C, 12 at each aw. After 4, 8, 12, and 16 days, three specimens from each aw were collected for color analysis and DON quantification. For color analysis, photos were taken and red, green and blue (RGB) channels were measured on ImageJ software. DON was quantified through liquid chromatography (HPLC). Color changes were only observed at aw = 0.99 because at lower aw the molds presented high growth of white mycelium. Yet, DON increased in all cases. It was only possible to relate the colors with DON concentration at aw = 0.99, where they presented inverse proportionality.
Highlights
IntroductionMycotoxin studies studies have have been been gaining gaining prominence prominence since since the the second second half half of of the the 20th20th century, century, and and Mycotoxin deoxynivalenol (DON) or vomitoxin (H O Figure 1)is among the most well-known among these deoxynivalenol (DON) or vomitoxin (H1520O66, Figure 1) is among the most well-known among these toxins [1]. [1]
This study aims to demonstrate that F. graminearum surface color can be used to predict how much DON the fungus produces taking aw in consideration
The central spot was less visible in the specimens grown at aw = 0.94 and it was increasingly noticeable as the water activity increased
Summary
IntroductionMycotoxin studies studies have have been been gaining gaining prominence prominence since since the the second second half half of of the the 20th20th century, century, and and Mycotoxin deoxynivalenol (DON) or vomitoxin (H O Figure 1)is among the most well-known among these deoxynivalenol (DON) or vomitoxin (H1520O66, Figure 1) is among the most well-known among these toxins [1]. [1]. Mycotoxin studies studies have have been been gaining gaining prominence prominence since since the the second second half half of of the the 20th. 20th century, century, and and Mycotoxin deoxynivalenol (DON) or vomitoxin (H O Figure 1). Is among the most well-known among these deoxynivalenol (DON) or vomitoxin 20O66, Figure 1) is among the most well-known among these toxins [1]. In. In its its physical physical form form DON
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