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Plantae. By Kevin Yudkin (your herbalist for this morning). A plant is…. Multicellular Eukaryotic Autotroph Sessile . Plants evolved from green algae (Protista). Contain chlorophyll a+b Fossil evidence (440 000 000 years ago) . Adaptations which allowed plants to grow on land:.

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plantae

Plantae

By Kevin Yudkin

(your herbalist for this morning)

a plant is
A plant is…
  • Multicellular
  • Eukaryotic
  • Autotroph
  • Sessile
plants evolved from green algae protista
Plants evolved from green algae (Protista)
  • Contain chlorophyll a+b
  • Fossil evidence

(440 000 000 years ago)

adaptations which allowed plants to grow on land
Adaptations which allowed plants to grow on land:
  • Cuticle – waxy covering to prevent water loss
  • Modified leaves (Shapes & Stomata)
  • Roots – take in water and anchor the plant
  • Stem – support for growth and food storage
  • Vascular development – transport food and water
  • Seed development – protects gametes
  • Alteration of generations (Sporophyte & Gametophyte)
phylogeny of plants
Phylogeny of plants
  • Non-Seed Plants – require moist environment for reproduction (spores)
  • Liverworts
  • Hornworts
  • Mosses
  • Whisk ferns
  • Club mosses
  • Horsetails
  • Ferns

Hornwort

phylogeny of plants cont
Phylogeny of plants (cont.)

Liverwort

Moss

Whisk fern

Fern

seedless non vascular
Seedless & Non-vascular
  • Bryophytes (Liverworts, hornworts, & mosses)
  • Do not have TRUE leaves, stem, or roots
seedless vascular
Seedless & Vascular
  • Psilophyta (Whisk ferns)
  • Lycophyta (Club mosses)
  • Arthrophyta (Horsetails)
  • Pterophyta (Ferns)
seed plants
can survive in dry environments

Divided into Gymnosperms {Naked seeds}

Angiosperms

Cycadophyta (Cycads – produce male & female cones)

Ginkgophyta (Ginkgo – seeds on female trees smell really bad)

Coniferophyta (Conifers)

Anthophyta (Flowering / fruit plants (250 000 species)

Seed Plants
picture of seed plants
Picture of Seed Plants

CYCAD

GINKO

CYCAD cones

chloroplasts
Chloroplasts
  • organelle of photosynthesis
  • Grana - an inner membrane system arranged in neat stacks
  • Stroma - The matrix of the chloroplast connecting grana
reaction sites
Reaction sites
  • Light reactions in the grana
  • Calvin Cycle in the stroma
in the grana light reaction
In the Grana (Light Reaction)
  • Water (H2O) splits into oxygen (O2) and hydrogen (H2) due to sunlight
  • Oxygen released as a waste product
  • ADP changed to ATP
in the stroma dark reaction
In the Stroma (Dark Reaction)
  • Hydrogen (H2) bonds to carbon dioxide (CO2) forming glucose (C6H12O6)
water and food transport
Water and Food Transport
  • Xylem – moves water
  • Phloem – moves food
flower structures
Flower Structures
  • Sepals
  • Outermost structures of the flower
  • Typically green, may be colored or in some cases may be absent
  • Make up calyx
  • Petals
  • Internal to the sepals
  • May be white or colored
  • Make up the corolla
flower structure cont
Flower Structure Cont.
  • Stamens
  • Internal to the petals
  • Consists of a filament and anther which contains the pollen grains
  • Pollen grains produce the male gametes
  • Pistil
  • Found in the center of the flower
  • Consists of three parts; the ovary, style, & stigma
  • Ovary contains "seedlike" structures called ovules
  • Ovules contain the female gametes
plant structures
The Root

Anchor the plant

Absorb & transport nutrients & water

Store food

The Stem

Produce & support new leaves, branches, and flowers

Place them in positions where they can function most efficiently

Transport materials to and from the roots

Store food

Carry on photosynthesis

Reproduce new plants

The Leaf

Intercept light with greater surface area

Exchange gases

Provide a site for photosynthesis

Store food & water

Provide support

Form new plants

Release heat through stomata

The Flower

Sexual reproduction unit

Produces and houses gametes (sex cells)

Attract pollinators

Plants utilize many agents for transporting pollen from one flower to another

Wind, Water, Insects, Birds, Bats

Plant Structures
plant structure
Plant structure
  • The Fruit
  • Upon fertilization, the ovary begins developing into a fruit and the ovules into seeds. The function of the fruit is to aid in the dispersal of the seeds.
  • The Seed
  • Serves as the unit of dispersal for the new plant
  • Provides protection from injury and drying
  • Provides some nourishment for the young plant until it can make its own food