Nusantara Science and Technology Proceedings
The 4th International Conference on Agriculture and Environmental Sciences (ICAES) 2023

The Effect of Water Activity on the Growth of Aspergillus flavus

Laras Setyowati (Agrotechnology, Agriculture Faculty, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia)
Nijma Nurfadila (Southeast Asia Regional Centre for Tropical Biology (SEAMEO BIOTROP), Jl. Raya Tajur Km. 6, Bogor, Indonesia)
Arika Purnawati (Agrotechnology, Agriculture Faculty, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia)



Article Info

Publish Date
26 Feb 2024

Abstract

Aspergillus flavus is recognized as one of the fungi responsible for inducing diseases and causing damage to both food and feed commodities. This fungus is capable of producing mycotoxins that possess toxic attributes to both humans and animals. The contamination by A. flavus spans a broad spectrum, commencing from field cultivation and extending to storage facilities. One alternative approach to manage this fungus involves the modification of its growth environment. Microorganisms inherently possess a minimum water activity (aw) value crucial for their metabolic processes. The objective of this study is to modify the aw value to inhibit the growth of A. flavus. This research was conducted in vitro using PDA media supplemented with glycerol and distilled water to establish aw conditions of 0.90, 0.92, 0.95, and 0.97. On the seventh day after incubation, the results demonstrated that for 0.90 aw exhibited a significant inhibition on A. flavus growth, with an average colony diameter is 1.34 mm, followed by 0.92 is 1.54 then 0.95 is 1.83 mm, and 0.97 is 1.84 mm. Conversely, treatments with 0.90 displayed the lowest inhibitions (1.34 mm) and 0.97 displayed the highest (1.84 mm). All modified water activity treatments exerted an impact on the growth of A. flavus. As the aw value decreases, the growth of A. flavus becomes increasingly constrained.

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Journal Info

Abbrev

nuscientech

Publisher

Subject

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology

Description

NST Proceeding supports regional research communities to globalise their findings in Science and Technology by providing an open access, online platform in line with international publishing standards and indexing scholarly conference proceedings. The current emphasis of the NST Proceeding includes ...