Abstract
We evaluated microbial populations and aflatoxin production in unhulled and white rice from rice processing complexes of the National Agricultural Cooperative Federation in five regions in Korea and identified three predominant Aspergillus species. Fungal and bacterial populations in rice samples were significantly different between regions in 2007. Aflatoxins were also detected and varied at the levels of 2.45-3.43 ng per g unhulled rice grain and 1.29-2.09 ng per g white rice grain. Unhulled rice generally detected higher level of aflatoxins than white rice regardless of sampling regions; however, no significant differences were found in Anseong and Cheonan in 2005 and Cheonan and Gimpo in 2007. Aflatoxin production between sampling regions was not different regardless of rice type and sampling year. Although the fungal diversity was highly distinct from region to region, three Aspergillus isolates were predominant in the rice samples; thus, representative isolates AC317, AF57, and AF8 were selected and identified based on their morphological and molecular characteristics. Consequently, isolates AC317, AF57, and AF8 were identified as A. candidus, A flavus, and A. fumigatus, respectively. These fungi can produce mycotoxins that are harmful for consumers and thus it is important to detect and reduce the population of storage fungi in rice.
| Original language | English |
|---|---|
| Pages (from-to) | 121-129 |
| Number of pages | 9 |
| Journal | Plant Pathology Journal |
| Volume | 26 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2010 Dec 1 |
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Keywords
- Aflatoxin
- Aspergillus candidus
- Aspergillus flavus
- Aspergillus fumigatus
- Identification
- Microbial population
- Rice
ASJC Scopus subject areas
- Agronomy and Crop Science
Cite this
Microbial population, aflatoxin contamination and predominant Aspergillus species in Korean stored rice. / Oh, Ji Yeon; Sang, Mee Kyung; Oh, Jee Eun; Lee, Hojoung; Ryoo, Mun Il; Kim, Ki Deok.
In: Plant Pathology Journal, Vol. 26, No. 2, 01.12.2010, p. 121-129.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microbial population, aflatoxin contamination and predominant Aspergillus species in Korean stored rice
AU - Oh, Ji Yeon
AU - Sang, Mee Kyung
AU - Oh, Jee Eun
AU - Lee, Hojoung
AU - Ryoo, Mun Il
AU - Kim, Ki Deok
PY - 2010/12/1
Y1 - 2010/12/1
N2 - We evaluated microbial populations and aflatoxin production in unhulled and white rice from rice processing complexes of the National Agricultural Cooperative Federation in five regions in Korea and identified three predominant Aspergillus species. Fungal and bacterial populations in rice samples were significantly different between regions in 2007. Aflatoxins were also detected and varied at the levels of 2.45-3.43 ng per g unhulled rice grain and 1.29-2.09 ng per g white rice grain. Unhulled rice generally detected higher level of aflatoxins than white rice regardless of sampling regions; however, no significant differences were found in Anseong and Cheonan in 2005 and Cheonan and Gimpo in 2007. Aflatoxin production between sampling regions was not different regardless of rice type and sampling year. Although the fungal diversity was highly distinct from region to region, three Aspergillus isolates were predominant in the rice samples; thus, representative isolates AC317, AF57, and AF8 were selected and identified based on their morphological and molecular characteristics. Consequently, isolates AC317, AF57, and AF8 were identified as A. candidus, A flavus, and A. fumigatus, respectively. These fungi can produce mycotoxins that are harmful for consumers and thus it is important to detect and reduce the population of storage fungi in rice.
AB - We evaluated microbial populations and aflatoxin production in unhulled and white rice from rice processing complexes of the National Agricultural Cooperative Federation in five regions in Korea and identified three predominant Aspergillus species. Fungal and bacterial populations in rice samples were significantly different between regions in 2007. Aflatoxins were also detected and varied at the levels of 2.45-3.43 ng per g unhulled rice grain and 1.29-2.09 ng per g white rice grain. Unhulled rice generally detected higher level of aflatoxins than white rice regardless of sampling regions; however, no significant differences were found in Anseong and Cheonan in 2005 and Cheonan and Gimpo in 2007. Aflatoxin production between sampling regions was not different regardless of rice type and sampling year. Although the fungal diversity was highly distinct from region to region, three Aspergillus isolates were predominant in the rice samples; thus, representative isolates AC317, AF57, and AF8 were selected and identified based on their morphological and molecular characteristics. Consequently, isolates AC317, AF57, and AF8 were identified as A. candidus, A flavus, and A. fumigatus, respectively. These fungi can produce mycotoxins that are harmful for consumers and thus it is important to detect and reduce the population of storage fungi in rice.
KW - Aflatoxin
KW - Aspergillus candidus
KW - Aspergillus flavus
KW - Aspergillus fumigatus
KW - Identification
KW - Microbial population
KW - Rice
UR - http://www.scopus.com/inward/record.url?scp=84885602024&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885602024&partnerID=8YFLogxK
U2 - 10.5423/PPJ.2010.26.2.121
DO - 10.5423/PPJ.2010.26.2.121
M3 - Article
VL - 26
SP - 121
EP - 129
JO - Plant Pathology Journal
JF - Plant Pathology Journal
SN - 1598-2254
IS - 2
ER -