Friday, August 13, 2010

How to identify Fungi ???

Table-1: Colonial morphology of common molds (Fungi)

S. no.

Fungi

Colony morphology

1.

Penicillium

Bluish-green; brush arrangement of phialospores.

2.

Aspergillus

Bluish-green with sulfur-yellow areas on the surface. Aspergillus niger is black.

3.

Scopulariopsis

Light brown; rough-walled microconidia.

4.

Trichoderma

Green, resemble Penicillium macroscopically.

5.

Gliocadium

Dark green; conidia (phialospores) borne on phialides,

similar to Penicillium; grows faster than Penicillium.

6.

Cladosporium

(Hormodendrum)

Light green to grayish surface; gray to black back surface;

blastoconidia.

7.

Pleospora

Tan to green surface with brown to black back; ascospores shown are produced in sacs borne within brown, flask-shaped fruiting bodies called pseudothecia.

8.

Scopulariopsis

Light brown; rough-walled microconidia.

9.

Paecilomyces

Yellowish-brown; elliptical microconidia.

10.

Alternaria

Dark greenish-black surface with gray periphery; black on reverse side; chains of macroconidia.

11.

Bipolaris

Black surface with grayish periphery; macroconidia shown.

12.

Pullularia

Black, shiny, leathery surface; thick walled; budding spores.

13.

Diplosporium

Buff-colored wooly surface; reverse side has red center surrounded by brown.

14.

Oospora (Geotrichum)

Buff-colored surface;hyphae break up into thin-walled

rectangular arthrospores.

15.

Fusarium

Variants of yellow, orange, red, and purple colonies; sickle-shaped macroconidia.

16.

Trichothecium

White to pink surface; two-celled conidia.

17.

Mucor

A zygomycete; sporangia with a slimy texture; spores with dark pigment.

18

Rhizopus

A zygomycete; spores with dark pigment.

19.

Syncephalastrum

A zygomycete; sporangiophores bear rod-shaped sporangioles, each containing a row of spherical spores.

20.

Nigrospora

Conidia black, globose, one-celled, borne on a flattened,

colorless vesicle at the end of a conidiophore.

21.

Montospora

Dark gray center with light gray periphery; yellow-brown conidia.

Figure-1: Microscopic appearance of some of the more common molds


Figure-2: Colony characteristics of some of the more common molds



Source:

Benson. 2001 Microbiological Applications Laboratory Manual in General Microbiology, Eighth Edition, the McGraw-Hill Companies.

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