Microscopic characteristics of fungal species (LAS 7)

Question 1

Rapidly growing fungus with a dense cottony non-septate mycelium, that is, white to dark gray. The mycelia is conjoined to stolon which connects sporangiospores. At the bottom of each network of unit is a root-like, rhizoid. The sporangiopores tip, the collumella, is spore-filled sporangia which extends to sporangium. That is, clearly visible when the sporangial wall raptures.

Answer 1

Rhizopus

Question 2

An appearance of dense wooly [floccose] non-septate mycelium. White to dark gray. In its vegetative form, it bears unparalleled sporangiophores with irregular branches that ends with spore-filled sporangia. The wall is brittle and sporangial wall [collarette] falls at the base of the spherical columella. The sporangiosphore that extends in the sporangium can only be seen when the sporangial wall raptures.

Answer 2

Mucor

Question 3

Slow growing fungi; leathery covered in a fine chalky white surface that has a distinct musty odor. Microscopically, slender hyphae [1 MICRON diameter] with spores. Formed by fragmentation or segmentation in the terminal branches.

Answer 3

Streptomyces

Question 4

A fairly rapid growth. White to cream color and has a consistency of a bacterial colony. No mycelium, only, ovel thin-walled budding cells.

Answer 4

Saccharomyces cerevisiae

Question 5

A rapidly growing, GRAYISH TO GREENISH-GRAY or BLACK WITH GRAY EDGES. Surface is overgrown with loose to white aerial hyphae. REVERISE SIDE BLACK.

Microscopically, dark septate mycelium produced at the end of the conidiosphores in chains, dark brown

with traverse and longitudinal septa

Answer 5

Alternaria

Question 6

Moderately slow growing. Dark gray-green; reverse side brownish-gray or black. Powdery to velvety becoming heaped or folded.

Microscopically has brown to olive color hyphae septate, dark conidiophores that varies in length, forming branches in repeated forking. Ending in chains of conidia. A one-celled wherein some case has a lemon-shaped.

Answer 6

Hormodendrum

Question 7

This genus should probably be included with Cladosporium

Answer 7

Hormodendrum

Question 8

Rapidly growing, white or cottony to green, yellowish green OR REMAINING WHITE DUE TO DENSE MATS OF CONIDIA ON SURFACE.

microscopically, septate hyphae with short branched conidiophores with ultimate branches of flask-shaped, opposite of in whorls.

Answer 8

Trichoderma

Question 9

Single-celled conidia formed in rounded clusters at tips of conidiophores, colorless and green.

Answer 9

Trichoderma

Question 10

Septate mycelium, conidiophores bore singly or in packed groups. Conidiophores are shored and branched-irregularly or in whorls. Macroconidia (many-celled) and microconidia (one-celled)

Answer 10

Fusarium

Question 11

Has attributes of macroconidia and microconidia

Answer 11

Fusarium

Question 12

unbranched sporangiophores arising in fascicles at a point opposite the rhizoids.

Answer 12

Difference of Rhizopus to mucor

Question 13

Rapidly growing, white then to yellow, green, brown, black and etc. Unbranched non-septate hypha /arising in the root of the mycelium/ Enlarged at the tip covered in flask-shaped sterigmata.

Answer 13

Aspergillus

Question 14

Rapidly growing, white then to bluish-green, yellow, brown, and etc. Very powdery due to the spores in the aerial mycelium. Its spore-bearing hyphae gives it, its “brush” makeup. The conidia are vertically arrange in /whorls/ from the ends of metulae arising from the branches of the conidiophore.

Answer 14

Penicillium