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II. Introduction to Plants

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II. Introduction to Plants. A. Evolutionary History. 1. Green Algal 'roots' Ulva (sea lettuce) ... a. Liverworts most primitive plants - lie flat on ground ... – PowerPoint PPT presentation

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Title: II. Introduction to Plants


1
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)

2
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)

3
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
Aquatic Habitats Terrestrial
Water available Desiccating
4
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
Aquatic Habitats Terrestrial
Water available Desiccating Sunlight absorbed
Sunlight available
5
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
Aquatic Habitats Terrestrial
Water available Desiccating Sunlight absorbed
Sunlight available Nutrients at Depth Nutrient
s available
6
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
Aquatic Habitats Terrestrial
Water available Desiccating Sunlight absorbed
Sunlight available Nutrients at Depth Nutrient
s available Buoyant Less Supportive
7
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
Aquatic Habitats Terrestrial
Water available Desiccating Sunlight absorbed
Sunlight available Nutrients at Depth Nutrient
s available Buoyant Less Supportive Low oxyg
en, higher CO2 reverse
8
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
B. Adaptations to Life on Land
1. Waxy Cuticle (reduce water loss)
9
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
B. Adaptations to Life on Land
1. Waxy Cuticle (reduce water loss)
2. Gametes protected
10
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
B. Adaptations to Life on Land
1. Waxy Cuticle (reduce water loss)
2. Gametes protected 3. Embryo protected
11
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
B. Adaptations to Life on Land
1. Waxy Cuticle (reduce water loss)
2. Gametes protected 3. Embryo protected VULNE
RABLE 4. Spore wall thick
12
II. Introduction to Plants A. Evolutionary His
tory 1. Green Algal roots Ulva (sea lettuce)
2. Colonization of Land Environmental Diffs
B. Adaptations to Life on Land
1. Waxy Cuticle (reduce water loss)
2. Gametes protected 3. Embryo protected VULNE
RABLE 4. Spore wall thick 5. Support
13
II. Introduction to Plants A. Evolutionary His
tory B. Adaptations to Life on Land C. Pla
nt Evolution Acquisition of Terrestriality
14
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 1. Characteristics a. s
hort (no vascular tissues)

15
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 1. Characteristics a. s
hort (no vascular tissues) b. limited to moist
habitats (swimming sperm)
16
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 1. Characteristics a. s
hort (no vascular tissues) b. limited to moist
habitats (swimming sperm) c. have cuticle

17
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 2. Diversity a. Liver
worts most primitive plants - lie flat on
ground - antheridia and archegonia on surfac
e
18
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 2. Diversity a. Liver
worts most primitive plants
b. Mosses
19
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20
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 2. Diversity a. Liver
worts most primitive plants b. Mosses
- have stomata regulate water loss
- grow from tip (apical) - antheridia a
nd archegonia at stalk tips
21
Archegonium
Antheridium
22
III. Plant Diversity A. Non-tracheophytes (no
true vascular tissue) 2. Diversity a. Liver
worts most primitive plants b. Mosses
- have stomata regulate water loss
- grow from tip (apical) - antheridia a
nd archegonia at stalk tips - swimming sperm

23
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24
III. Plant Diversity B. Tracheophyte Origins
1. The Rhyniophyta vascular system of phloem an
d xylem
25
III. Plant Diversity B. Tracheophyte Origins
1. The Rhyniophyta Silurian 440 mya vascular
system of phloem and xylem tracheids in sporop
hytes - water and nutrient distribution
26
Gymnosperms Angiosperms
27
III. Plant Diversity B. Tracheophyte Origins
1. The Rhyniophyta vascular system of phloem and
xylem tracheids in sporophytes - water and nut
rient distribution - lignin and support
28
III. Plant Diversity B. Tracheophyte Origins
4. Life History simple (primitive) - Homospory
29
III. Plant Diversity C. Non-seed Tracheophytes

1. Lycophytes (Club Mosses)
30
III. Plant Diversity C. Non-seed Tracheophytes
1. Lycophytes - (Club Mosses) - ancient domi
nated first forests 300-350 mya

Lepidodendron - 45m -Carboniferous
31
III. Plant Diversity C. Non-seed Tracheophytes
1. Lycophytes - (Club Mosses) - ancient domi
nated first forests 300-350 mya
- simple leaves
32
III. Plant Diversity C. Non-seed Tracheophytes
1. Lycophytes - (Club Mosses) - ancient domi
nated first forests 300-350 mya
- simple leaves - Dominant Sporophyte (wi
th stobili)
33
III. Plant Diversity C. Non-seed Tracheophytes

1. Lycophytes - (Club Mosses)
34
III. Plant Diversity C. Non-seed Tracheophytes

1. Ferns and their allies
35
III. Plant Diversity C. Non-seed Tracheophytes
1. Ferns and their allies - true complex
leaves
36
III. Plant Diversity C. Non-seed Tracheophytes
1. Ferns and their allies - true complex
leaves
- true roots
37
III. Plant Diversity C. Non-seed Tracheophytes
2. Ferns and their allies - true complex
leaves - true roots - also ancient ap
pearing 350 mya - dominant sporophyte reduce
d gametophyte
38
Fern Life Cycle
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