|
KMID : 0377619670130010083
|
|
Korean Jungang Medical Journal
1967 Volume.13 No. 1 p.83 ~ p.100
|
|
|
Studies on Distribution of Fungi and Aspergillus Spades in Soil
|
|
|
|
|
Abstract
|
|
|
The distribution of soil fungi in the Taegu city area and its vicinity was studied from June 1965 through May 1966.
Five areas were selected for the collection of samples, twice monthly during the year, and from each area the soil samples were collected from the .surface and 5cm, 10cm, 15cm, and 20cm, depths of the ground.
The distribution of the aspergillus species was also studied from the soil and from grain, bran, and pea.
The results obtained were as follows.
1. The isolated soil fungi consisted of 7,452 strains Consist of 34 genera, among which 66.3% of the strains belonged to fungi imperfecti.
2. The following were the most common genera in the soil: penicillium(1, 664 strains), hormodendrum (682), aspergillus (417), spicaria (413), botrytis (284), and alternaria
(275),
3. The fungi were abundantly distributed in fields and hills, while fewer seen in the garden areas.
4. The fungi were remarkably abundant on the ground surface and gradually decreased by the depths of the ground regardless of area.
5. The monthly variations of the total strains increased from June through July, and reached a peak in August, decreased from September, reached the lowest level in January, and again started to increase from March.
6. There were some monthly variations in each area, but these were relatively little influence of the season on the deeper ground levels.
7. Monthly variations of the 6 common genera were:
1) Penicillium was increased on the surface of the ground in summer and autumn, but at a 10cm depth it was increase remarkably in autumn, and at a 20cm depth also increased a little in summer and autumn.
2) Hormodendrum was increased on the surface of the ground and at a 10 cm depth in summer and autumn, while no remarkable change was noted at a 20cm depth.
3) Aspergillus was increased on the surface in summer and suddenly dropped October, at a 10 cm depth it gradually increased up to early autumn; at a 20 cm depth it slightly increased in summer.sligthl
4. Specaria was increased on the surface and at a 10cm depth in summer,while at a 10cm depth it was at peak in October and at a 20cm it slightly increased in January.
5. Botrytis was increased on the surfaced and at a 10cm depth in summer and autumn, while at a 20cm depth it slightly increased in late spring.
6. Alternaria was slightly on the surfaced and at a 10cm depth in summer and autumn, while no remarkable change was noted at a 20cm depth.
8. Distribution of 304 strains of 16 aspergillus species isolated from the soil was as follows:
1) Common species were A. niger (164 strains, A. versicolor (44), A. ochraceus (26), A. flavus (26). A fumigatus (24), A. znguis (24), A. ustus (24), which showed slight variation in each area.
2) On the surface and at the 5cm depth, these were heavily distributed but below the 10 cm they remarkably decreased.
9. Distributions of 194 strains of 17 aspergillus species isolated from bran, two kinds of corn, and pea were as follows:
1) The highest incidencet was observed in barely, and followed by rice, bran and pea in the order of frequency.
2) Common aspergillus species were A. versicolor (41 strains), A. flavus (29), A. niger (20), A. ochraceus (13), A. sydowi (13), A. fumigatus, and A. nidulance and A. repenes were 10 strains respectively. No remarkable difference in number was noted among the bran, corns or pea.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|