Chapter 16: Plants,
Fungi
& the Move
onto Land -phyte
= plant
1. Biology/Society: Will Blight end American Chestnut?
introduces both Kingdoms, fungus is parasite
2.
Colonizing
Land: fig 2 is missleading: from a to
b did not happen
- One major difference between: algae
and plants = embryo
- NOT
cell walls, sorry, they are different but not major issue.
Plants
evolved
on(to) land from one group of green
algae,
Red algae
are an unrelated end point
Charophycean algae (fig 6) are
closest protists to plants: 4 homologies, both have: - 1) Rosette complexes in plasma
membranes to synthesize cellulose microfibrils (cell wall).
-
2) Peroxisome enzymes to
reduce
loss of organic products resulting from
photorespiration.
-
3) Flagellated
sperm cells (in primitive plants): sperm
resemble sperm of
charophyceans.
-
4) Some details of cell division are found
only
in land plants & the most complex charophycean algae
- Green
alga life cycle, note 1) all sperm are equal: no egg gametes
2) alga is HAPLOID
- TEXTBOOK:
plants have adaptations
to protect from drying out: stomata,
waterproof cuticle,
protected embryo, gametangia, placenta;
&
plasmodesmata
pass molecules & ions between cells (multicellular
algae?).
List of plant adaptations: middle of first
paragraph
(More
advanced plants have vascular
tissue, fig 4, & lignin, 2
More on which algae likely evolved
onto land, plant
evolution)
3. Plant
Diversity, fig 7: four great
leaps forward: 1 adaptations to land, 2 vascular
tissue, 3 seeds, 4
flowers.
NOTE: like algae,
primitive plants
develop when haploid, but higher plants develop when diploid
So there is
an alternation
of generations.
Fig 10: what you see, most primitive plants = haploid gameteophytes,
& only briefly diploid sporophytes.
Fig 14: compares the three main types of plant life cycles: mosses,
ferns & seed plants.
Botany Images Resource: general botany most
useful here
1 non-vascular = bryophytes: mosses,
life-cycle
& liverworts, life-cycle, hornworts,
life-cycle
fig
9,
10 - haploid male or female plant produces sperm or egg. Pinhook,
2, wiki
2
vascular: trachaeophytes
= windpipe/vessel plants.
Ancestral groups are spore (not seed)
bearing
Equisetophyta ~ horsetails,
Lycopodiophyta ~ clubmosses, spikemosses,
quillworts,
Psilotophyta
~ whisk-ferns:
Fig 12: ancient ferns became
fossil fuels. Garfield Park
Conservatory Fern Room, events,
Pteridophyta
~
ferns: fig 11, 12 & 14 (center - plant is
diploid =
sporophyte).
Life
cycle, giant -
where?, NZ
Although ferns can grow large, they cannot sexually reproduce in drier
environments.
3
seeds: spermatophytes
=
meaning seed plant, not sperm plant, (but they have sperm
too).
Male gamete reaches female gamete without help of water, carried on the
wind.
Environment: cooler, drier, favored evolution of gymnosperms
= naked ovule/seed: Farabee,
Kimball,
wiki
Have three
more
adaptations to
life on land: reduction of gametophyte, pollen, seeds.
sporophyte
tree > male & female cones >
gametes > male pollen drifts to female > zygote > embryo
(seed) > tree
- cycads,
subtropical/tropical group of plants with a large crown of
compound leaves and a stout trunk,
- Ginkgo, 1 species only, PWL campus, trees male
or
female: make stinky seeds
- conifers, cone-bearing trees and shrubs, oldest living
organism,
- gnetae,
woody plants in the genera Gnetum,
Welwitschia, and Ephedra (medicine)
4 flowers: angiosperms:
seed in a box/coat, angi- = box. Farabee:
Life cycle, Kimball:
Life Cycle
Flower:
sepal; petal; carpel = pistil: stigma, style & ovary;
& stamen: filament & anther, more.
Flowers are adapted
to attract
pollinators.
Spanish
moss is a bromeliad!
grass
flower
ADD to THIS REVIEW Botany:
Global News Articles
1. Which is common to all plants?: vascular tissue,
flowers, seeds, cuticle, stomata,
pollen
2. Gametophyte is to ?n as ?Sporophyte is to diploid
3. Why are coal, oil & gas called fossil fuels? lycophytes, Field:
coal forest,
4. How does evergreen nature of conifers adapt them to short growing
season? dehydration? why softwood?
5. Describe sperm delivery in ferns & mosses
6. Where are forests being used sustainably? Is clearcutting ever
sustainable?
7. ? are to conifers as flowers are to ?
8. List four main organs in a flower
9. what is a fruit?
4. Loss of
plant diversity
and its likely cost to humans: list,
more, images,
poisonous
plants, ethnobotany
Resources:
general, classify,
Families,
ID
CA
wildflower, AU
plants, Images, Farabee,
Kimball,
Table 16: Plant Medicines: Defense
against hebivory: q/q/chemical/defenses, herbalism, medicines
Botany course:
images & life cycles of prokaryotes, protists, fungi
& plants
plant physiology, plant
tissues,
Banyan
Tree,
Alexander,
5. FUNGI: fig 20, WIKI, another
complete page
Fungi have chitin
in cell
wall; most
slime
molds & water molds do not = fungi-like,
but not related
Common molds are fungi
(see below). Mildew.
Evolution: Wiki: Opisthokonta:
animal & primitive
fungi sperm are similar, thus related!
Fungi (cell wall) & arthropods exoskeleton produce
chitin (homologous or analagous?)
Note:
Irish
potato famine, wiki: due to water mold, not
fungus. Early
blight is due to a fungus
world's
largest
organism, one of the oldest too, is a fairy
ring, K-12,
Summaries: K-12
(but fungi moved?), or
Wiki, or Kimball:
chitin, or
Farabee:
good illustrations,
Homologies? with animals:
heterotrophs,
but most are saprotrophs
as they don't move!
Nutrition: saprotrophs, but some are parasitic,
New Zealand:
live on insect larvae.
Life
cycle/reproduction: mushroom life
cycle:
(+ & - is = male & female)
This example mycelium is dikaryotic (n+n) > fruit body > haploid
spores
+/-, grow & fuse
another
description, clearest?
the stalk is just compacted hyphae,
another:
red & black nuclei cross over?, or
fig 21, Wiki,
more detailed, slide show
Types of Fungi: Yeast (unicellular
mostly): Saccharomyces:
baking, brewing, fermenting, ethanol
All the
rest:
"are like" fig 21: hypha/mycelium
is haploid OR dikaryotic
+
reproductive
structure (varies)
Chytridiomycota:
primitive group, "little pot", some are parasites on amphibia, plants
All the rest include molds
Zygomycota:
sexual reproduction includes zygote-spores,
includes black
bread mold
Glomeromycota:
includes arbuscules
in roots of angiosperms (very valuable): mutualism (both
benefit)
Next two are "higher
fungi" or dikarya: cells contain two haploid nuclei
Ascomycota: sac
fungi, includes symbiont lichen, & yeasts, morels, truffles, Penicillium,
& many plant pathogens
Basidiomycota: produce
spores
in a club-shaped basidium, some
mushrooms, some
yeasts.
ROLES: Ecological
roles of fungi: major decomposers, symbionts above,
yeast,
Human uses & diseases:
e.g. aspergillus:
good, bad & worse: aflatoxin, yeast infection,
Purdue: Arthur
Herbarium, Lucy
in the sky. Edible (scroll),
poisonous,
poisonous
plants,
Evolution
Connection: Symbiosis
- Parasitic:
insects,
human, & mutualistic
(scroll) examples, each involving a fungus.
REVIEW: & two good
resources: Volk's
fungi, Mycoweb.
How is animal nutrition different from fungal nutrition?
How do yeasts raise bread? Write chemical reaction
What are hyphae?
What is athletes's
foot? ringworm?
Do both fungi and plants
produce antibiotics?