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Dwipa, Retty Putri Utami. Competition between mycotoxigenic and non-toxigenic strains of aspergillus species under shifting temperature conditions. Master's Degree(Food Science). Kasetsart University. Office of the University Library. : Kasetsart University, 2020.
Competition between mycotoxigenic and non-toxigenic strains of aspergillus species under shifting temperature conditions
Name: Dwipa, Retty Putri Utami
Classification :.LCCS: QK625.M7
LCSH:
Aspergillus
LCSH:
Toxigenic fungi
LCSH:
Aflatoxins
LCSH:
Ochrotoxin
Abstract:
This study aims to investigate (1) an interaction between aflatoxigenic and ochratoxigenic fungi under shifting temperature, (2) effects of oxidative stress conditions on mycotoxigenic fungi, (3) effectiveness of A. oryzae to reduce aflatoxin B1 (AFB1) and ochratoxin A (OTA) under shifting temperature. The temperatures employed initially included static temperature of 20ºC, 35ºC, 40ºC and abruptly shifting temperatures of 20/35ºC and 20/40ºC. At static and shifting temperature, A. flavus and A. carbonarius have antagonistic interaction. At 20/40ºC, mixed cultures at of A. flavus and A. carbonarius resulted in stimulation of OTA production. It indicated the raise of oxidative stress in fungi. Mixed cultures at 20/40ºC had higher level of protein carbonyl, superoxide dismutase (SOD) and catalase (CAT) than at 20ºC. Besides, A. oryzae had different effectiveness based on nutrients on the media. Low temperature and high water activity (20oC, 0.97 aw) would be favourable for A. oryzae to reduce AFB1 and OTA on chilli-based media. However, A. oryzae would be more effective to reduce production of OTA instead of AFB1 under shifting temperature as the induction of AFB1 was observed at certain shifting temperature conditions. Overall, competition between toxigenic fungi of A. flavus and A. carbonarius, and shifting temperature could stimulate OTA production, which is presumably related to the increase of oxidative stress on fungi. Moreover, competition between toxigenic (A. flavus and A. carbonarius) and nontoxigenic fungi (A. oryzae) could reduce OTA production at static and shifting temperature, despite decreasing reduction rate under shifting temperature.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Warapa Mahakarnchanakul
Role:
Thesis Advisor
Name: Kullanart Tongkhao
Role:
Thesis CO-Advisor
Name: Kanithaporn Vangnai
Role:
Thesis CO-Advisor
Created:
2020
Modified:
2025-07-20
Issued:
2025-07-20
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2563/dwipa-ret-all.pdf
CallNumber:
QK625.M7 .D85
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Food Science
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
ใช้เวลา
0.039493 วินาที
Dwipa, Retty Putri Utami
| Title | Contributor | Type |
|---|---|---|
| Competition between mycotoxigenic and non-toxigenic strains of aspergillus species under shifting temperature conditions
มหาวิทยาลัยเกษตรศาสตร์ Dwipa, Retty Putri Utami | Warapa Mahakarnchanakul | วิทยานิพนธ์/Thesis |
Warapa Mahakarnchanakul
Kullanart Tongkhao
| Title | Creator | Type and Date Create |
|---|---|---|
| Elimination of salmonella typhimurium and escherichia coli on leafy vegetables by using ozone microbubbles
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| Mitigation of carcinogenic Polycyclic Aromatic Hydrocarbons (PAHs) in cooked meat
มหาวิทยาลัยเกษตรศาสตร์ Kanithaporn Vangnai;Kullanart Tongkhao;Yaowapa Lorjaroenphon;Pongsak Hengniran | Huong, Huynh Thi Thu. | วิทยานิพนธ์/Thesis |
| Molecular analysis approach for investigation of microbial changes during storage of organic treatments on trimmed aromatic coconut
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Kanithaporn Vangnai