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Protists & Fungi

Although slime molds like this are no longer classified as fungi (they were recently reclassified as a type of protist), they produce spores in a similar way to fungi. The pink sacs seen here are called sporangia, or they places where the spores are produced.

Photography by Paul Zahl

Introduction

On the following slides, the summary color is in orange and all vocabulary terms are underlined.

The kingdom Protista is probably the most diverse group of organisms on the planet.

Although previously classified in the plant kingdom, fungi are unlike plants because they lack chlorophyll , so they are always heterotrophs.

In this unit will we review details of both the Protist and the Fungi kingdoms.

Protists

Some are microscopic and others grow to be meters long.

Some act like animals, while some act like plants.

Some are poisonous and others are parasitic.

This protist Trichonympha lives in the gut of termites to digest the cellulose of wood. Image

Protists Foldable

Turn to pg. 503 in the textbook.

Pick up one sheet of computer paper to build our Protist foldable.

Write your name in the lower center of the back of the page. http://www.tulane.edu/~wiser/protozoology/notes/protist.gif

Protist Foldable Instructions

1.

2.

3.

4.

Fold your paper in half along the X axis, but leave a

½ inch flap at the bottom edge [one side is longer than the other].

Fold the flap upwards.

Create a title for the foldable at the top of your foldable: EX “All about Protists”, “World of

Protists”, etc.

Create three cuts in the foldable on the top, large flap and the short small flap [DO NOT cut through the back page].

Foldable Instructions Cont.

5.

Title the OUTSIDE, smaller flaps from L to R:

Animal-like

Plant-like

Fungi-like

6.

7.

Title the INSIDE, smaller flaps from L to R:

Protozoa (pg. 504)

Algae (pg. 511)

Slime Molds, etc. (pg. 517)

Add three sketches to represent each of the types of protists on outside, larger flaps.

Foldable Part 1 – Protozoa

Textbook Reference pg. 504-509

On the inside flap, answer the following questions using the textbook reading section.

Cell Type [Unicellular, Multicellular, or Both]

Energy Type [Autotrophs or Heterotrophs]

Reproduction [Asexual, Sexual, or Both]

 3 Types of Movement [w/ a short explanation]:

 Pseudopodia

Flagellates

Ciliates

A fisher gathers up algae to remove it from the water in

Qingdao on July 6. The North China Sea Marine

Forecasting Center recently predicted the thick masses of algae would continue spreading north, according to

Xinhua. Photograph from ChinaFotoPress

Foldable Part 2 – Algae

Textbook Reference pg. 510-516

On the inside flap, answer the following questions using the textbook reading section..

Cell Type [Unicellular, Multicellular, or Both]

T or F: Plant-like protists contain roots, stems, and leaves like plants.

Energy Type [Autotrophs or Heterotrophs]

T or F: Plant-like protists photosynthesize.

 T or F: Plant-like protists contain chlorophyll.

Types of Algae[w/ a short explanation]:

Euglenoids: Unlike plants, they lack a _____ _____; movement using _________.

Diatoms: shells composed of _____; AKA ________ in aquatic ecosystems.

Dinoflagellates: Cell walls of _________; some are _________

[means “living light’], but many are _________ causing red tides.

Red, Brown, & Green Algae: Includes seaweeds and kelp, but can also be found growing on _______ soil and tree _________.

Video

The Blob (1958 )

Movie Clip

Image

From “Top Ten

Weirdest Stories of

2012”

The living slime that may have been the muse for the 1958 science-fiction film The

Blob just got creepier:

In October, scientists reported that slime mold, a brainless single-celled organism, has a form of memory.

Photograph by Audrey

Dussutour

Foldable Part 3 – Slime Molds, Etc.

Textbook Reference pg. 517-520

On the inside flap, answer the following questions using the textbook reading section..

Cell Type [Unicellular, Multicellular, or Both]

Energy Type [Autotrophs or Heterotrophs]

 T or F: Fungi-like protists are decomposers.

3 Types [w/ a short explanation]:

Slime Molds: Live in _____, _____, _____ places.

Water Molds & Downy Mildews: Live in _____ or _____ places; can cause __________.

Briefly explain the example from Ireland beginning in 1845.

Diseases Caused by Protists

Textbook Reference pg. 508-509

 Sporozoans have no structure for movement because they are parasitic; they are more complex and usually involve more than one host.

EX Plasmodium - causes malaria and infects both mosquitoes and humans.

EX Amebic dysentery ( Giardia) from infected water will cause severe diarrhea, nausea and fatigue; attaches to the host's intestinal lining.

There are estimates that there may be as many as 2.5 million cases each year of Giardia intestinalis in the US alone(6). A single-celled protozoa, the parasite also poses a serious threat abroad, and exists at very high prevalence rates particularly in places with poor water sanitation. Image

Protists in the Biosphere

Take a deep breath! Thank a protist!

Phytoplankton are microscopic organisms that float near the surface of oceans and lakes and carry out more than 70% of the Earth's total photosynthesis

(contributing to the oxygen in our environment).

Fungi

Laetiporus sulphureus

Photograph by Dan Molter

Fungi are important in the fact that they recycle materials back into the soil to replenish it for other organisms; as decomposers they are essential elements in the ecosystems of Earth.

Fungi Photography

Fungi Podcast

What is a fungus?

Mycology = the study of Fungi

Fungi – singular

Fungus – plural

Key Characteristics:

Eukaryotic [w/ nuclei, mitochondria, and other organelles]

Heterotrophs [ decomposing “feeders”]

Multicellular

Cannot move on their own

How are fungi different from plants?

4 Reasons:

Lack chlorophyll [the green pigment in chloroplasts]

Therefore they are NOT photosynthetic

 Most are saphrophytes [“feeds” on dead or decaying matter]

 Some are parasites

Never reproduce by seeds

Most have cell walls of chitin, except molds [NOT cellulose]

Parts of Fungi

Hypha (s) = a network of thin thread-like structures that form the “body” of a fungus; hyphae (p)

 hyphae grow and branch until they cover and digest the food source

Germ tube

(growing spore)

(initial hypha)

Single hypha

Mass of hyphae

(mycelium)

Parts of Fungi Cont.

Mycelium (s) = mass of hyphae; mycelia (p)

 usually hidden in the soil, in wood, or another food source

 may fill a single ant, or cover many acres

The Types of Fungi

Zygomucotes Ascomycotes Basidiomycotes Deuteromycotes mold

 reproduce asexually & sexually

 Sporangia – structures on the tips of hyphae; make spores

 Rhizoids hyphae of bread mold that digest bread for ingestion

EX Bread mold sac fungi

 reproduce asexually & sexually

 Ascus- tiny saclike structures that make spores

EX Yeast club-shaped part which produces the spores

 reproduce asexually & sexually

 Mushrooms can release large clouds of spores.

 Each cloud contains millions of spores

EX Mushrooms

Imperfect fungi

 currently only known to reproduce asexually

 cause most fungal diseases in humans

EX Athlete’s foot

The Four Types of Fungi

Zygomucotes Ascomycotes Basidiomycotes Deuteromycotes mold

 reproduce asexually & sexually

 Sporangia – structures on the tips of hyphae; make spores

 Rhizoids hyphae of bread mold that digest bread for ingestion

EX Bread mold sac fungi

 reproduce asexually & sexually

 Ascus- tiny saclike structures that make spores

EX Yeast club-shaped part which produces the spores

 reproduce asexually & sexually

 Mushrooms can release large clouds of spores.

 Each cloud contains millions of spores

EX Mushrooms

Imperfect fungi

 currently only known to reproduce asexually

 cause most fungal diseases in humans

EX Athlete’s foot

The Four Types of Fungi

Zygomucotes Ascomycotes Basidiomycotes Deuteromycotes mold

 reproduce asexually & sexually

 Sporangia – structures on the tips of hyphae; make spores

 Rhizoids hyphae of bread mold that digest bread for ingestion

EX Bread mold sac fungi

 reproduce asexually & sexually

 Ascus- tiny saclike structures that make spores

EX Yeast club-shaped part which produces the spores

 reproduce asexually & sexually

 Mushrooms can release large clouds of spores.

 Each cloud contains millions of spores

EX Mushrooms

Imperfect fungi

 currently only known to reproduce asexually

 cause most fungal diseases in humans

EX Athlete’s foot

The Four Types of Fungi

Zygomucotes Ascomycotes Basidiomycotes Deuteromycotes mold

 reproduce asexually & sexually

 Sporangia – structures on the tips of hyphae; make spores

 Rhizoids hyphae of bread mold that digest bread for ingestion

EX Bread mold sac fungi

 reproduce asexually & sexually

 Ascus- tiny saclike structures that make spores

EX Yeast club-shaped part which produces the spores

 reproduce asexually & sexually

 Mushrooms can release large clouds of spores.

 Each cloud contains millions of spores

EX Mushrooms

Imperfect fungi

 currently only known to reproduce asexually

 cause most fungal diseases in humans

EX Athlete’s foot

Fungi Foldable

Turn to pg. 535 in the textbook.

Pick up one sheet of computer paper to build our

Fungi foldable.

Write your name in the middle of the back of the page. http://content63.eol.org/content/2011/11/03/02/57753_orig.jpg

Fungi Foldable Instructions

1.

2.

3.

4.

Fold your paper in half along the X axis.

Then fold the top and bottom edges to meet in the middle.

Fold the foldable in half along the Y axis.

Open and cut along the middle, vertical fold; you should now have four flaps.

5.

Title the OUTSIDE flaps clockwise for the upper left:

Zygomycotes [AKA Molds]

Ascomycotes [AKA Sac Fungi]

Basidiomycotes [AKA Mushrooms]

Deuteromycotes

Foldable Part 1 – Zygomycotes

Textbook Reference pg. 535-536

On the inside flap, answer the following questions using the textbook reading section.

Familiar Examples

Reproduction [Asexual, Sexual, or Both]

 Sketch the reproductive cycle diagram at the bottom of pg. 536

[including labels].

Key Vocabulary:

Stolon

Rhizoid

Foldable Part 2 – Ascomycotes

Textbook Reference pg. 537

On the inside flap, answer the following questions using the textbook reading section..

Familiar Examples

Reproduction [Asexual, Sexual, or Both]

Key Vocabulary:

Ascus

Ascospores

Conidiophores

Conidia http://content60.eol.org/content/2012/06/12/07/64006_orig.jpg

Foldable Part 3 – Basidiomycotes

Textbook Reference pg. 535-536

On the inside flap, answer the following questions using the textbook reading section.

Familiar Examples

Reproduction [Asexual, Sexual, or Both]

 Sketch the diagram of a mushroom cap and stalk at the bottom of pg. 539 [including labels for gill, basidia, and basidiospores].

Key Vocabulary:

Basidia

Basidiospores

Foldable Part 4 – Deuteromycotes

Textbook Reference pg. 535-536

On the inside flap, answer the following questions using the textbook reading section.

Familiar Examples

Reproduction [Asexual, Sexual, or Both]

Fungi are used to make the antiobiotic penicillin.

Penicillium marneffei

Image

Diseases Caused by Fungi

Textbook Reference pg. 546

 Fungal diseases are estimated to be responsible for between 15 to 50% of the world’s crop loss.

 EX black stem rust [infects wheat, rice ], corn smut, and ergot [Salem Witch Trials]

 Human pathogens

The microorganism Candida albicans is responsible for ringworm, athletes foot, and yeast infections of the female reproductive tract.

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