Plant '12
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Transcript of Plant '12
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1. Multicellular Eukaryotes
2. Have cell walls made of cellulose
3. Carry out photosynthesis using
chlorophyll a & b4. Store energy as starch
(carbohydrates)
5.
Most are autotrophs A few are parasites (live on living
organisms) or saprobes (live ondead organisms)
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Parasitic plants extract nutrients and water
directly from its hosts tissues
After a (Cuscuta) Dodder attaches itself to a plant, it wraps itselfaround it. If the host contains food beneficial to dodder, thedodder produces haustoria that insert themselves into thevascular system of the host. The original root of the dodder in thesoil then dies. The dodder can grow and attach itself to multipleplants.
Mistletoe takesnutrients from thetrees
http://en.wikipedia.org/wiki/Haustoriahttp://upload.wikimedia.org/wikipedia/commons/7/7d/MistletoeInSilverBirch.jpghttp://en.wikipedia.org/wiki/Haustoriahttp://upload.wikimedia.org/wikipedia/commons/1/12/Cuscuta_parasite_plant.JPGhttp://upload.wikimedia.org/wikipedia/commons/c/c2/Cuscuta_europaea_2005.06.12_15.07.24.jpg -
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1. Sunlight
2. Water
3. Minerals
4. Gas Exchange
5. Transport of water and nutrients
throughout the plant body
Remember Photosynthesis:
6H2O + 6CO2 C6H12O6 + 6O2(water + carbon dioxide + sunlight glucose + oxygen)
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Plants most likely evolved from an
organism like the freshwater multicelluar
green algae living today.
Plants had to overcome challenges asthey moved from water to land:
Adapt to be able to acquire water
Adapt features to transport water Be able to conserve water more
effeciently
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1. Bryophytes (Mosses and their
relatives)
2. Seedless Vascular (Ferns and their
relatives)
3. Gymnosperms (cone-bearing
plants)
4. Angiosperms (flowering plants)
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Water-conducting tissue (vascular)
Seeds
Flowers
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VASCULAR PLANTS Contain tube-like cellsfor transport (Tracheophytes) Can grow large and farther away from water source.
NONVASCULAR PLANTS Does not containtube-like cells for transport. (Bryophytes) Water and nutrients travel by diffusion
and osmosis.
Small and grows close to water source
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NONVASCULAR PLANTS
Plants draw up water by osmosis only a fewcentimeters above the ground.
Low growing plants that are found in
moist, shaded areas.
Seedless plants reproduce using spores
RHIZOIDS A LONG THIN CELL THAT ANCHORS MOSS TOTHE GROUND AND ABSORBS H20 & MINERALS FROM SOIL
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Includes: Mosses
Liverworts
Hornworts
http://images.google.com/imgres?imgurl=http://static.howstuffworks.com/gif/irish-moss-1.jpg&imgrefurl=http://home.howstuffworks.com/irish-moss.htm&h=319&w=400&sz=58&hl=en&start=41&um=1&tbnid=VR8lHNFkPhWecM:&tbnh=99&tbnw=124&prev=/images?q=pictures+of+plant+moss&start=40&ndsp=20&um=1&hl=en&safe=active&sa=N -
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FERNS
GYMNOSPERMS(CONE BEARING PLANTS)
ANGIOSPERMS(FLOWERING
PLANTS)
http://images.google.com/imgres?imgurl=mnorris.wellington.net.nz/photos/fern.jpg&imgrefurl=http://mnorris.wellington.net.nz/photography.html&h=530&w=808&sz=106&tbnid=umN3Sm9YE8kJ:&tbnh=93&tbnw=141&prev=/images?q=FERN&hl=en&lr=&ie=UTF-8&oe=UTF-8&sa=N -
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They are vascular but reproduce using spores
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Bear their seeds directly on the surface
of cones.
Vascular plants
Gymnosperm means naked seed
Includes conifers such as pines and spruces
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Most conifers are evergreens. They retain their leaves
throughout the year.
Most needles stay on the
plant for 2-14 years. Can carry on photosynthesis
as soon as spring arrives!
A few are deciduous. Deciduous - Lose their leaves at a
particular season andare dormant in the winter.
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http://images.google.com/imgres?imgurl=www.sccs.swarthmore.edu/users/99/maya/swat-flowers.gif&imgrefurl=http://www.sccs.swarthmore.edu/users/99/maya/photos.html&h=300&w=210&sz=43&tbnid=6wpAzvICXBUJ:&tbnh=110&tbnw=77&prev=/images?q=FLOWERS&start=20&hlhttp://images.google.com/imgres?imgurl=www.nedthecomputerguy.com/images/flowers.jpg&imgrefurl=http://www.nedthecomputerguy.com/photos.htm&h=480&w=640&sz=50&tbnid=utNM8Qzi6kgJ:&tbnh=101&tbnw=134&prev=/images?q=FLOWERS&hl=en&lr=&ie=UTF-8&oe=Uhttp://www.moonbowgraphics.com/lauriesphotogallery/flowers/flowerbunchsmall.jpghttp://www.moonbowgraphics.com/lauriesphotogallery/flowers/wildsunflower.jpghttp://www.moonbowgraphics.com/lauriesphotogallery/flowers/purppetunbunch.jpghttp://images.google.com/imgres?imgurl=www.moonbowgraphics.com/lauriesphotogallery/flowers/pinkrose3.jpg&imgrefurl=http://www.moonbowgraphics.com/lauriesphotogallery/flowers/photogalleryflowers1.html&h=392&w=369&sz=33&tbnid=SoXue-xZa5wJ:&tbnh=118&tbnw=112&prev -
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Can be classified as: Annuals
Biennials
Perennials
Annuals live only one growing season
Biennials live only two growing season
Perennials live for more than two years
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Roots absorbs water and dissolved
nutrients, anchors the plant, protect the
plant from bad soil, and transports water to
rest of the plant
Stems support system for the plant body,
transport system for water and nutrients
Leaves plants main photosynthetic system
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Desert Plants
Root system
Shallow to obtain water
Reduced leaves
Cactus needlesreduced surface area
Thick stems To store water
Dormant Seeds
Germinate only when enough moisture
present
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Life in the water: Have tissues with large air-filled
spaces through which oxygen can
diffuse down the stem Seeds that
float and delay germination Specialized air roots that allow O2 to
get to the roots down in the mud
Salty conditions:
Specialized cells in the leaves thatpump the salt out of the plant tissue
onto the leaf surface where rain
washes it off
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Poor soil:
If the soil cant provide N2,
plants trap and digest insects
that release N2
Plants without Roots:
Live on body of another plant
No roots live in a humid
environment to retain/store
water from rainfall
Spanish
Moss
Venus FlyTrap
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Fighting insects:
Make/secrete chemicals that are
toxic if eaten
Need for Pollination
Plants will mimic a pollinators mate
Milkweed
Waspattemptingto mate with
the flower
Ophrysspeculummimics afemale
wasp
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Monocots
One seed leaf
Parallel veins in leaves
Flower parts in multiples of threes Ex. Grass, orchids
Dicots
Two seed leaves
Contain netted veins Flower parts in multiples of four or fives
Exs trees, shrubs
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