Mycotoxin production by some IndianAlternaria species

Area of Science:

• Mycology
• Food Safety
• Plant Pathology

Background:

• Alternaria species are common plant pathogens and food contaminants.
• Several Alternaria species are known producers of mycotoxins, posing risks to food safety.
• Limited information exists on the mycotoxin-producing capabilities of all Alternaria species.

Purpose of the Study:

• To screen seven Alternaria species for their ability to produce five major mycotoxins.
• To identify new mycotoxin-species associations for Alternaria.
• To assess the mycotoxin elaboration potential of Alternaria species on a rice culture medium.

Main Methods:

• Seven species of Alternaria were cultured on rice medium.
• The culture filtrates were analyzed for the presence of tenuazonic acid (TA), alternariol (AOH), alternariol methyl ether (AME), altenuene (ALT), and altertoxin-I (ATX-I).
• Mycotoxin concentrations were quantified.

Main Results:

• All seven screened Alternaria species produced mycotoxins in varying concentrations.
• Alternaria capsici-annui was identified as a mycotoxin producer for the first time.
• New mycotoxin-species associations were established, including ALT by A. citri and A. tomato; ALT and ATX-I by A. tenuissima; ALT, TA, and AME by A. porri; and TA by A. radicina.

Conclusions:

• The study confirms that multiple Alternaria species can produce a range of mycotoxins.
• The findings expand the known mycotoxin profiles of several Alternaria species.
• This research contributes to understanding the potential for mycotoxin contamination in food and agricultural products by Alternaria.