PhotosynthesisNick Gotshall

What is Photosynthesis?

Takes Place in Plant’s Leaves

Series of Reactions in Plant Cells

Conversion of Light Energy

Provides Chemical Energy

Base of Almost All Food Chains

The “Typical” Plant CellEudicot

Genetic material

membrane bound organelles

Cell Wall

Vacuole

Chloroplasts

Overall ReactionCO2 + H2O sunlight Sugar + O2

Chlorophyll

Chlorophyll and sunlight must be present

Takes place in a series of two reactions

1. Light reaction=first

2. Calvin Cycle=second

Light ReactionDependent upon presence of sunlight

(photons)

Takes place in chloroplasts (thylakoid)

Transfers Electrons in four reactions

Overall Reaction

H2O sunlight/chlorophyll O2 + ATP + NADPH

Light Reaction ContinuedProduces …

Oxygen (O2)

Chemical Energy to fuel Calvin Cycle

ATP

NADPH

Calvin CycleTakes place in chloroplasts (stroma)

Formerly “Dark Reaction”

Does not require photons

Requires products of light reaction

Produces usable energy in series of reactions

Sugar

Importance of PhotosynthesisProvides base for almost all food chains

May have been initial means for evolution

Waste from photosynthesis is oxygen

Leads to increased biodiversity

Human Uses for PlantsFood

Raw materials

Fuel

Clothing

Currency

The List is endless!

Review; Photosynthesis…Takes place in plant’s leaves

Happens in chloroplasts in plant cell

Photosynthesis converts photons into sugar

Light reaction

Dark reaction

Very important for everyone!

Work CitedSlide 2

http://www.pdphoto.org/PictureDetail.php?mat=&pg=5528. Leaf- 2003-01-05.

Slide 4http://www.flickr.com/photos/skitzitilby/1242020466/.

under the horsechestnut tree enjoying peace and quiet Slide 8

http://www.butler.edu/herbarium/treeid/photosynthesis.jpg.

Slide 10http://www.flickr.com/photos/elena_norbiato/

2444950911/. Fruits and Colors.