Can plants think?

Do plants have a social life?

Pre-syringa leaf c.s.

Plants: Leaf Cross Section

Plants review:Vascular Tissue:Xylem, transports waterPhloem, transports foodGas intake:Guard cells open forming STOMATES

Stomates and Guard cells

PHOTOSYNTHESIS:The starting point of life*

Experiment design

Experiment design: Is light necessary for photosynthesis?

Experiment.predict outcomeDARKEMPTY,LIGHTBLUE,EMPTY,LIGHTLIGHT

RESULTS: explainDARKLIGHTLIGHTLIGHT

1st concept to know:Living things run on batteries. What is the battery?

We recharge ATP from sugar (glucose)where does sugar come from?

Adenosine Triphosphate (ATP) Molecule that provides lifes energy.Works by popping of a phosphate group, releasing stored energy 3 parts:

AdenineRibose3 Phosphate groups

ADPATPEnergyEnergyAdenosine diphosphate (ADP) + Phosphate Adenosine triphosphate (ATP)PartiallychargedbatteryFullychargedbatterySection 8-1Figure 8-3 Comparison of ADP and ATP to a Battery

An organism can either make its own food, or eat it. They are called autotrophs or heterotrophs

Nutrition

PHOTOSYNTHESIS:process which light energy is converted into sugar energy

PBS interactive

How do we know what goes in and out of plants?

Major Players in the Development of the Photosynthesis Equationhow did they each contribute? What where their results? Conclusions?Van Helmont: what ingredient makes up plants?Priestly: What are plant byproducts?Ingenhousz: Is light really that important?

What was his conclusion?Of what was he ignorant?

Priestlyconclusion?

Ingenhouszconclusion?

Conclusion of scientists:

formula

WHY ARE PLANTS GREEN?

The chloroplast: the plant 1 worker

Chloroplast Anatomy

The mechanics of photosynthesis

ChloroplastLight-Dependent ReactionsCalvinCycleNADPHATPADP + PNADP+ChloroplastSection 8-3Figure 8-7 Photosynthesis: An Overview

PhotosynthesisH2OCO2O2C6H12O6Light ReactionDark ReactionLight is AdsorbedBy ChlorophyllWhich splitswaterChloroplastATP andNADPH2ADPNADPCalvin CycleEnergyUsed Energy and is recycled.++

HydrogenIon MovementPhotosystem IIInnerThylakoidSpaceThylakoidMembraneStromaATP synthaseElectron Transport ChainPhotosystem IATP FormationChloroplastResources:Photosynthesis animation, VCACPhotosynthesis video, Mastering BiologyLight-Dependent Reactions

ChloropIastCO2 Enters the CycleEnergy Input5-CarbonMoleculesRegeneratedSugars and other compounds6-Carbon SugarProducedSection 8-3Figure 8-11 Calvin Cycle

Comparison of Mitochondria and ChloroplastsBoth have a large amount of internal membrane surface area.

Both have their own ribosomes.

Both have their own genomes.

Both produce a large amount of ATP.

Both derive energy for ATP synthesis from H+ pumps.

The mitochondrial genome (in humans) is about 16,000nucleotides long.

The chloroplast genome is about 10x the size of the mitochondrial genome.

Quick QuizWhat is the ultimate purpose of photosynthesis?Where does the Calvin Cycle occur?What is the purpose of water?What is the purpose of light?What is the primary raw ingredient of sugar?Where do the Light-Dependent Reactions occur?What makes the turbine spin that makes ATP?What is the waste product of the Light-Dependent Reactions?Why are plants green?

includesoftake place intakes place inusesto produceto produceuseSection 8-3Test yourself

Photosynthesisincludesoftake place intakes place inusesto produceto produceuseSection 8-3Do NowCalvin cycleATPNADPHHigh-energysugarsstroma

Chromatography Lab follow-up

Absorption of Light byChlorophyll a and Chlorophyll bVBGYORChlorophyll bChlorophyll aSection 8-2Figure 8-5 Chlorophyll Light Absorption

ENERGY ABSORPTION ON AN ATOMIC LEVELChlorophyll, a green pigment molecule, allows plants to absorb light energy. A pigment molecule obtains energy only at certain frequencies of light.

Energy insufficient to reach an excited state is not absorbed (click 1). Similarly, energy that drives an electron past one energy level but is insufficient to reach a second is not absorbed (click 1). To be absorbed, the energy must be sufficient to reach only allowable energy states (click 1). This simple rule of quantum physics is all you need to know to understand an absorption spectra of chlorophyll (click 1). excited statesground state12

http://seawifs.gsfc.nasa.gov/SEAWIFS.html

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