Abstract
Distribution of Aspergillus flavus and A. parasiticus in sugarcane field soils, air and harvested sugarcane stems was studied in Okinawa Prefecture, the southernmost in Japan. Using a combination of dilution plate and plant debris plate techniques, the fungi were detected on all seven islands tested and in 74% of 53 soil samples. The fungi were also found on the cut surface of sugarcane stems from one of the islands. A. parasiticus was the predominant fungus although many atypical isolates of this fungus that produced metulated conidial heads were also detected. The aflatoxin producing strains were approximately 89% (146/164) of all the isolates and approximately 69% of A. flavus isolates. More than 40% of A, flavus isolates also produced G aflatoxin. SEM observation of conidial wall texture was useful for distinguishing A. parasiticus from A. flavus. Cyclopiazonic acid, an indole mycotoxin, was never synthesized by any of the A. parasiticus or G aflatoxin-producing A. flavus isolates tested. The digest this study is as follows: (1) A. parasiticus was isolated from sugarcane field soils, air and harvested sugarcane; (2) all strains of A. parasiticus isolated in these areas were different from type strain of A. parasiticus in terms of cytochrome b gene sequence and divided into 3 DNA types; and (3) the strains of afratoxin G-producing A. flavus were all A. nomius and divided into 2 DNA types. Molecular analysis of isolates showed that the strains isolated from sugarcane field soil, air and harvested sugarcane stems from the southernmost part of Japan are highly diverse and differ in terms of aflatoxin-producing ability.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Aspergillus fungi were detected on all seven islands and in 74% of 53 soil samples.
- Taxon
- sugarcanet0
- Interactor
- Aspergillus flavus
Aspergillus flavuse1pathogen - Outcome
- fungi were detectede0
- Value
- 74% of 53 soil samplese0
- Setting
- seven islandse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungi were detected on all seven islands tested and in 74% of 53 soil samples.”
t0“sugarcane fields”
e1“Aspergillus flavus and A. parasiticus”
Claim · model-written summary
Aspergillus fungi were found on cut sugarcane stems from one island.
Verbatim
e0“The fungi were also found on the cut surface of sugarcane stems from one of the islands.”
Claim · model-written summary
A. parasiticus predominated among the detected fungi.
- Taxon
- sugarcanet0
- Interactor
- A. parasiticus
Aspergillus parasiticuse0pathogen - Outcome
- predominant funguse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. parasiticus was the predominant fungus although many atypical isolates of this fungus that produced metulated conidial heads were also detected.”
t0“sugarcane fields”
Claim · model-written summary
Atypical A. parasiticus isolates with metulated conidial heads were detected.
- Taxon
- sugarcanet0
- Interactor
- A. parasiticusAspergillus parasiticuse0pathogen
- Outcome
- atypical isolates of this fungus that produced metulated conidial heads were also detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. parasiticus was the predominant fungus although many atypical isolates of this fungus that produced metulated conidial heads were also detected.”
t0“sugarcane fields”
Claim · model-written summary
About 89% of all isolates produced aflatoxin.
Verbatim
e0“The aflatoxin producing strains were approximately 89% (146/164) of all the isolates”
t0“sugarcane fields”
Claim · model-written summary
About 69% of A. flavus isolates produced aflatoxin.
- Taxon
- sugarcanet0
- Interactor
- A. flavusAspergillus flavuse0pathogen
- Outcome
- A. flavus isolatese0
- Value
- approximately 69%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“approximately 69% of A. flavus isolates.”
t0“sugarcane fields”
Claim · model-written summary
More than 40% of A. flavus isolates produced G aflatoxin.
Verbatim
e0“More than 40% of A, flavus isolates also produced G aflatoxin.”
t0“sugarcane fields”
Claim · model-written summary
Conidial wall texture by SEM distinguished A. parasiticus from A. flavus.
- Taxon
- sugarcanet0
- Interactor
- A. parasiticusAspergillus parasiticuse0pathogen
- Outcome
- useful for distinguishing A. parasiticus from A. flavuse0
- Comparator
- A. flavuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SEM observation of conidial wall texture was useful for distinguishing A. parasiticus from A. flavus.”
t0“sugarcane fields”
Claim · model-written summary
No tested A. parasiticus isolates synthesized cyclopiazonic acid.
- Taxon
- sugarcanet0
- Interactor
- A. parasiticusAspergillus parasiticuse0pathogen
- Outcome
- Cyclopiazonic acid, an indole mycotoxin, was never synthesizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cyclopiazonic acid, an indole mycotoxin, was never synthesized by any of the A. parasiticus or G aflatoxin-producing A. flavus isolates tested.”
t0“sugarcane fields”
Claim · model-written summary
No tested G aflatoxin-producing A. flavus isolates synthesized cyclopiazonic acid.
- Taxon
- sugarcanet0
- Interactor
- A. flavusAspergillus flavuse0pathogen
- Outcome
- Cyclopiazonic acid, an indole mycotoxin, was never synthesizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cyclopiazonic acid, an indole mycotoxin, was never synthesized by any of the A. parasiticus or G aflatoxin-producing A. flavus isolates tested.”
t0“sugarcane fields”
Claim · model-written summary
A. parasiticus from these areas differed from its type strain and formed three DNA types.
- Taxon
- sugarcanet0
- Interactor
- A. parasiticusAspergillus parasiticuse0pathogen
- Outcome
- different from type strain of A. parasiticus in terms of cytochrome b gene sequence and divided into 3 DNA typese0
- Value
- 3 DNA typese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all strains of A. parasiticus isolated in these areas were different from type strain of A. parasiticus in terms of cytochrome b gene sequence and divided into 3 DNA types”
t0“sugarcane fields”
Claim · model-written summary
The G aflatoxin-producing A. flavus strains were A. nomius and formed two DNA types.
Verbatim
e0“the strains of afratoxin G-producing A. flavus were all A. nomius and divided into 2 DNA types.”
t0“sugarcane fields”