Origin of the Land Plants. Alternation of Generations.

Slides:



Advertisements
Similar presentations
PLANT DIVERSITY I.
Advertisements

Four main groups of Land Plants
18 Sept. 2014Ferns&Moss.ppt1 FERNS & MOSSES Spore Dispersed Plants.
29-30: Kingdom Plantae What constitutes a plant?
The Plant Kingdom Origins MYA 10 Phyla 4 Basic lifecycles Green algae that evolved onto land Evolved becoming more terrestrial, independent from.
Plant Diversity I How Plants Colonized Land Chapter 29.
CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS COLONIZED LAND Ferns in a Tasmanian Forest.
AP Biology Domain Bacteria Domain Archaea Domain Eukarya Common ancestor Kingdom: Plants Domain Eukarya.
Non-Vascular Plants.
Chapter 29 Plant Diversity I: The Colonization of Land AP Biology.
Biology 11. Transition onto Land Advantages of living in the water included… 1.Prevents drying out. 2.Gives structural support (less affected by gravity)
Plant Diversity Numero Uno Lab 6 BIOL 171. Introduction First land plants were related to green algae – 500 million years ago.
Chapter 29 Plant Diversity I
Plant Diversity I How Plants Colonized Land. Closest relatives??? Green algae called charophyceans are the closest relatives of land plants Green algae.
Lesson Overview 22.2 Seedless Plants.
Figure 29.0 Ferns.
Alternation of Generations Plant life cycles have two alternating generations: a diploid phase (2N) and a haploid phase (N) During alternation of generations,
Nonvascular Plants and Seedless Vascular Plants BSC 2011L.
Plant Diversity and Life Cycles
First land plants Bryophytes: mosses & liverworts –non-vascular no water transport system no true roots –swimming sperm flagellated sperm –lifecycle dominated.
Chapter 29 Plant Diversity I: How Plants Colonized Land.
Lesson Overview 22.2 Seedless Plants.
1)Please turn in your Unit 9 Test Corrections on the table by the door.  Staple your corrections to the back of your test. 2)If you have not yet selected.
What is a plant? Unit 7 Chapter 20. Plant characteristics Eukaryotic Multicellular Autotroph: food made through photosynthesis Cell walls made of cellulose.
K: Plantae = The Land Plants. What is a plant? Multicellular autotroph? With complex tissues?
Chapter 29 Notes Plant Diversity I: How Plants Colonized Land.
Plant Diversity I: How Plants Colonized Land (Ch.29)
1 Introduction to the Plant Kingdom Introduction to the Plant Kingdom PAGE 35.
Plant Diversity I: How Plants Colonized Land Chapter 29.
Do Now: Lengthwise growth of a root tip into the soil results mainly from… Cone bearing plants are known as… Which of the following statements about bryophyta.
Mr. Ramos Plant Organs and Tissues. Introduction to Plants There are over 260,000 different species of flowering plants alone! Plants are multicellular,
Seedless Vascular Plants
Review of Plant Diversity
THE PLANT KINGDOM.
Plant Diversity I Chapter 29. Introduction to Plants  Multicellular, ________, photosynthetic autotrophs  Cell walls made of cellulose  More than 290,000.
Bryophytes Oldest plants ~400 million years old
Chapter 29: Plant Diversity I The Colonization of Land
The Move to Land and Plant Diversity. More than 280,000 species of plants inhabit Earth today. Most plants live in terrestrial environments, including.
Plants: The simple ones
P lant D iversity I : T he C olonization of L and Campbell, 5 th Edition, Chapter 29 Nancy G. Morris Volunteer State Community College.
Chapter 29 Plant Diversity I: How Plants Colonized Land.
Ch. 29 Plant Diversity I: The Colonization of Land.
13 Feb. 2012Ferns&Moss.ppt1 FERNS & MOSSES Seedless plants.
Seedless Plants Chapter 26. Plant Adaptations to Land  Cuticle  Waxy covering on leaves that helps prevent desiccation  Stomata  Pores on the surface.
PLANT CLASSIFICATION. Bryophytes - Mosses Bryophytes Are small, low-lying, (generally) moisture-loving plants No xylem or phloem Need water to reproduce.
Seedless Plants.
Chapter 29 Plant Diversity I: How Plants Colonized Land.
Plant Diversity. General Characteristics of Plants All plants are: Eukaryotic Autotrophic Multicellular Cell Walls with cellulose Chloroplasts w/ chlorophyll.
Plant Diversity Chapter 22. What is a Plant? Members of the Kingdom Plantae They are divided into 4 groups: Bryophytes, Ferns, Gymnosperms, and Angiosperms.
1 2 Early Ancestors 3 Land Adaptations 4 Plant Life Cycles.
AP Biology Domain Bacteria Domain Archaea Domain Eukarya Common ancestor Kingdom: Plants Domain Eukarya.
Nonvascular Plants and Seedless Vascular Plants BSC 2011L.
Chapter 29.  500 mya plants and fungi moved from the land to the water  All plants evolved from an aquatic green algae  In Kingdom Plantae, there are.
Plant Diversity 1: The Colonization of Land
Aquatic Plants: Non-Vascular Plants and Ferns. Evolution of Plants Plants are thought to have evolved from green algae The green algae called charophyceans.
Non-Vascular Plants and Ferns
Plant Diversity I: How Plants Colonized Land AP Biology Crosby High School.
Plant Kingdom. Plants on land Plants are the most dominant group or organisms on Earth by weight Very diverse 2mm across to 100m tall Most are photosynthetic.
Alternation of Generations
Chapter 29 Plant Diversity
The Kingdom Plantae Chapter 28.
Plant Diversity II – Ch. 29 Lecture Objectives
How Plants Colonized Land
Plant Classification.
“Man is the most insane species
Plantae.
Lecture Ch. 29 Date _______
Seedless and Seed bearing
Intro to Plants.
Plant Diversity I How Plants Colonized Land
Presentation transcript:

Origin of the Land Plants

Alternation of Generations

Charophycean Algae Don’t display alternation of generations Most closely related to land plants by homology Organisms are haploid Examples: Chara and Coleochaete Single-celled zygote produces haploid spores by meiosis Gametes are bi-flagellate

Homologies Between Charophyceans and Land Plants Chloroplasts have chlorophyll a & b, carotenoids and other accessory pigments Cell walls with cellulose (20-26%) Peroxisomes with anti-photorespiration enzymes Phragmoplasts for cell plate formation Rosette cellulose-synthesizing complexes Molecular systematics: DNA, rRNA, chloroplast DNA

Chara – Pond Algae

Challenges of Moving to Land Lack of moisture Ultraviolet light Separation of water, minerals, and carbon source (CO 2 ) Lack of support for the plant body Rapidly changing environmental conditions

Bryophytes Nonvascular plants Dominant form is the haploid gametophyte Swimming gametes require water Diploid dependent sporophyte produces haploid spores by meiosis. Spores grow into gametophyte plants that produce haploid gametes by mitosis. Mosses, liverworts, hornworts

Liverwort Gemmae cups of Marchantia

Marchantia

Moss Sporophyte and capsule Gametophyte plant (n)

Polytrichum - Moss

Peat Bogs Store Carbon

Spagnum Moss

VASCULAR PLANTS (TRACHEOPHYTES)

Branched, independent sporophytes Sporophytes are the dominant plant Asexual reproduction: Spores Sexual reproduction: Gametes Swimming gametes require water Possess Xylem and Phloem True roots, stems and leaves in some groups Pteridophytes (Seedless Vascular Plants)

Lycophyta: Club MossesPterophyta: Whisk Ferns Sphenophyta: Horsetails Pterophyta: Ferns

Lycophyta Woody trees dominating Carboniferous period (300 mya) Epiphytes – “Air Plants” Club-shaped spore-bearing cones called strobili Spores very flammable

Sphenophyta Woody trees during Carboniferous period Hollow ribbed stems jointed at nodes Silica (silicon dioxide) granules Equisetum hyemale or Scouring rush

Polypodium fern

Fern Life Cycle

Sori on lower side of frond

Sorus and mature sporangium

Fern Prothalus (Gametophyte Plant)

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.