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Aquatic AncestorAquatic Ancestor
Closest livingClosest living
speciesspecies to ato a
possible landpossible land
plant ancestorplant ancestor
Group ofGroup of greengreen
algaealgae
CalledCalled
CharyophyceansCharyophyceans CharaChara
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Algae & Land PlantAlgae & Land Plant
SimilaritiesSimilarities
Both containBoth contain chlorophyllschlorophylls aa andand bb
HaveHave chloroplastschloroplasts with stacks ofwith stacks of
thylakoidsthylakoids
StoreStore starchstarch inin plastidsplastids
CelluloseCellulose inin cell wallscell walls
Go throughGo through Alternation of GenerationsAlternation of Generations
life Cyclelife Cycle
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Living in Aquatic EnvironmentsLiving in Aquatic Environments
Plants surrounded by water soPlants surrounded by water so
don’t dry outdon’t dry out
Sperm swimsSperm swims to eggto egg
Water supportsWater supports plantplant
Plants stay in upper surfacePlants stay in upper surface nearnear
lightlight
AbsorbAbsorb nutrientsnutrients from thefrom the HH22OO
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Plant Adaptations to LandPlant Adaptations to Land
Problems:Problems:
Need mineralsNeed minerals
GravityGravity
Increase inIncrease in
Height for LightHeight for Light
Adaptations forAdaptations for
DrierDrier
environmentenvironment
ReproductionReproduction
Solutions:Solutions:
RootsRoots absorb Habsorb H22O &O &
mineralsminerals
Lignin & celluloseLignin & cellulose in cellin cell
wallswalls
VascularVascular TransportTransport
SystemSystem
Waxy cuticleWaxy cuticle &&
stomatastomata with guardwith guard
cellscells
PollenPollen containing spermcontaining spermcopyright cmassengalecopyright cmassengale
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How Are PlantsHow Are Plants
All Alike?All Alike?
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Plant CharacteristicsPlant Characteristics
MulticellularMulticellular
AutotrophicAutotrophic (photosynthesis)(photosynthesis)
ChlorophyllsChlorophylls aa andand bb in thylakoidin thylakoid
membranesmembranes
Surrounded bySurrounded by cell wallscell walls containingcontaining
cellulose (polysaccharide)cellulose (polysaccharide)
Store reserve food asStore reserve food as amyloseamylose
(starch)(starch)
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TaxonomyTaxonomy
Plants are dividedPlants are divided
intointo twotwo groupsgroups
Based on theBased on the
presence orpresence or
absenceabsence of anof an
internal transportinternal transport
systemsystem for waterfor water
and dissolvedand dissolved
materialsmaterials
CalledCalled VascularVascular
SystemSystem
VascularVascular
BundlesBundles
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Vascular SystemVascular System
XylemXylem tissue carriestissue carries waterwater andand
mineralsminerals upward from the rootsupward from the roots
PhloemPhloem tissue carriestissue carries sugarssugars mademade
by photosynthesis from the leavesby photosynthesis from the leaves
to where they will be stored orto where they will be stored or
usedused
SapSap is the fluid carried inside theis the fluid carried inside the
xylem or phloemxylem or phloem
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Nonvascular PlantsNonvascular Plants
Do not haveDo not have
vascular tissuevascular tissue
forfor supportsupport oror
conduction ofconduction of
materialsmaterials
CalledCalled
BryophytesBryophytes
Require aRequire a
constantly moistconstantly moist
environmentenvironment Moss Gametophytes &Moss Gametophytes &
SporophytesSporophytes
Sporophyte stageSporophyte stage
GametophyteGametophyte
StageStage
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Nonvascular PlantsNonvascular Plants
Plants can’t grow as tallPlants can’t grow as tall
Cells must be inCells must be in direct contactdirect contact
with moisturewith moisture
Materials move byMaterials move by diffusiondiffusion
cell-to-cellcell-to-cell
Sperm mustSperm must swim to eggswim to egg
through water dropletsthrough water droplets
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Nonvascular PlantsNonvascular Plants
Includes mossesIncludes mosses (Bryophyta)(Bryophyta),,
liverwortsliverworts (Hepatophyta)(Hepatophyta), and, and
hornwortshornworts (Antherophyta)(Antherophyta)
LiverwortsLiverworts HornwortsHornwortscopyright cmassengalecopyright cmassengale
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Main Parts of VascularMain Parts of Vascular
PlantsPlants
ShootsShoots
-Found above ground-Found above ground
-Have leaves attached-Have leaves attached
- Photosynthetic part of- Photosynthetic part of
plantplant
RootsRoots
-Found below ground-Found below ground
-Absorb water & minerals-Absorb water & minerals
-Anchor the plant-Anchor the plant
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Vascular PlantsVascular Plants
Also calledAlso called
TracheophytesTracheophytes
Subdivided intoSubdivided into
two groups --two groups --
SeedlessSeedless
vascular plantsvascular plants
andand Seed-Seed-
bearingbearing vascularvascular
plantsplants
Club MossClub Mosscopyright cmassengalecopyright cmassengale
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Seedless Vascular PlantsSeedless Vascular Plants
Includes club mossIncludes club moss (Lycophyta)(Lycophyta),,
horsetailshorsetails (Sphenophyta)(Sphenophyta), whisk, whisk
fernsferns (Psilophyta)(Psilophyta), and ferns, and ferns
(Pterophyta)(Pterophyta)
HorsetailsHorsetailsWhisk fernsWhisk ferns copyright cmassengalecopyright cmassengale
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Seed-Producing VascularSeed-Producing Vascular
PlantsPlants
Includes two groups –Includes two groups –
GymnospermsGymnosperms andand AngiospermsAngiosperms
GymnospermsGymnosperms havehave naked seedsnaked seeds inin
conescones
AngiospermsAngiosperms havehave flowers thatflowers that
produce seedsproduce seeds to attractto attract
pollinators and produce seedspollinators and produce seeds
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GymnospermsGymnosperms
ConiferophytaConiferophyta areare
known as conifersknown as conifers
Includes pine,Includes pine,
cedar, spruce, andcedar, spruce, and
firfir
CycadophytaCycadophyta ––
cycadscycads
GinkgophytaGinkgophyta --
ginkgoginkgo
GinkgoGinkgo
CycadCycad
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GymnospermsGymnosperms
Contains theContains the
oldest livingoldest living
plant –plant – BristleBristle
cone pinecone pine
Contains theContains the
tallest livingtallest living
plant –plant – SequoiaSequoia
or redwoodor redwood
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AngiospermsAngiosperms
Flowering plantsFlowering plants
SeedsSeeds are formed when anare formed when an
egg or ovuleegg or ovule is fertilized byis fertilized by
pollenpollen in the ovaryin the ovary
OvaryOvary is within a floweris within a flower
Flower contains the maleFlower contains the male
(stamen)(stamen) and/or femaleand/or female
(ovaries)(ovaries) parts of the plantparts of the plant
FruitsFruits are frequentlyare frequently
produced from theseproduced from these
ripened ovaries (ripened ovaries (helphelp
disperse seeds)disperse seeds)
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AngiospermsAngiosperms
DivisionDivision AnthophytaAnthophyta
Subdivided into two groups –Subdivided into two groups –
Monocots and DicotsMonocots and Dicots
MonocotsMonocots have a single seedhave a single seed
cotyledoncotyledon
DicotsDicots have two seed cotyledonshave two seed cotyledons
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MonocotsMonocots
ParallelParallel
venation invenation in
leavesleaves
Flower parts inFlower parts in
multiples of 3multiples of 3
Vascular tissueVascular tissue
scatteredscattered inin
cross sectioncross section
of stemof stem
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DicotsDicots
Net venationNet venation inin
leavesleaves
Flower parts inFlower parts in
multiples of 4multiples of 4
or 5or 5
Vascular tissueVascular tissue
in ringsin rings inin
cross sectioncross section
of stemof stem
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Why We Can’t do WithoutWhy We Can’t do Without
Plants!Plants!
Produce oxygen for theProduce oxygen for the
atmosphereatmosphere
Produce lumber for buildingProduce lumber for building
Provide homes and food for manyProvide homes and food for many
organismsorganisms
Prevent erosionPrevent erosion
Used for foodUsed for food
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More Reasons We Can’t doMore Reasons We Can’t do
Without Plants!Without Plants!
Produce wood pulp for paperProduce wood pulp for paper
productsproducts
Source of many medicinesSource of many medicines
Ornamental and shade for yardsOrnamental and shade for yards
Fibers such as cotton for fabricFibers such as cotton for fabric
DyesDyes
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