Procedure 1: Rhizopus Structure and Life Cycle Black bread mold, Rhizopus, is a typical example of division Zygomycota. It has a complex life cycle involving both sexual and asexual structures. A diagam of the life cycle is shown in Figure 11.2. 1. Study Figure 11.2 and locate the following structures: a. Mycelium: the network of filaments or hyphae. b. Sporangium: the capsule that produces spores, located at the end of the upward-growing Sporangiophore; site of asexual spore formation. c. Gametangia: thickened structure that grows at the tip of two hyphae that have grown towards each other; the two gametangia fuse to form the zygote. d. Zygospore: the thick, black protective coat that forms around the zygote; site of sexual spore formation. 84 Kingdom Fungi Exercise 11 ygospore, spores asexual fertation gametes IN sporangium diploide haploid sexual + strain + strain hyphae strain -strain — sporangium spores 20 germination of rygospore Drawing of Rhizopus structures sporangium sporangiophore gametangia mycelium Figure 11.2. Divisions, characteristics, and examples of organisms from kingdom Fungi. 2. Now obtain a specimen of Rhizopus and examine it under a dissecting scope. Identify as many of the above structures as possible. Draw and label what you observe below. Exercise 11 Kingdom Fungi 85

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter14: Plants And Fungi

Section: Chapter Questions

Problem 14SQ

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Use the picture below of the Rhizopus fungi and draw a sketch of what you observe. Be sure to also label the sporangium, sporangiaphore, and the hyphae.

Procedure 1: Rhizopus Structure and Life Cycle
Black bread mold, Rhizopus, is a typical example of division Zygomycota. It has a complex life cycle
involving both sexual and asexual structures. A diagam of the life cycle is shown in Figure 11.2.
1. Study Figure 11.2 and locate the following structures:
a. Mycelium: the network of filaments or hyphae.
b. Sporangium: the capsule that produces spores, located at the end of the upward-growing
Sporangiophore; site of asexual spore formation.
c. Gametangia: thickened structure that grows at the tip of two hyphae that have grown
towards each other; the two gametangia fuse to form the zygote.
d. Zygospore: the thick, black protective coat that forms around the zygote; site of sexual
spore formation.
84 Kingdom Fungi Exercise 11
ygospore,
spores
asexual
fertation
gametes
IN
sporangium
diploide
haploid
sexual
+ strain
+ strain
hyphae
strain
-strain —
sporangium
spores
20
germination of rygospore
Drawing of Rhizopus structures
sporangium
sporangiophore
gametangia
mycelium
Figure 11.2. Divisions, characteristics, and examples of organisms from kingdom Fungi.
2. Now obtain a specimen of Rhizopus and examine it under a dissecting scope. Identify as many
of the above structures as possible. Draw and label what you observe below.
Exercise 11 Kingdom Fungi 85

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