Photosynthesis Animation

Photosynthesis

Setting the Scene…

Thylakoid

Granum

Stroma

Stroma

Thylakoid space

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS Ie-e- e-e-

The Light Reactions

PS II PS I

e-e-

e-e-

The Light Reactions

PS II PS I e-e-

e-e-

The Light Reactions

PS II PS I

e-e-

e-e-

The Light Reactions

PS II PS I

e-e-

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ADP + P

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

e-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

ATP

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I (PS I)?Problem 2: How can we replace the electrons lost by PS I?Problem 3: Who is the final electron acceptor for the ETC in PS II?Problem 4: How can we replace the electrons lost by PS II?

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?

NAD+

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?

NAD+

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?Solution! High energy electron carrier!!!

NAD+

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?Solution! High energy electron carrier!!!

NAD+

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 1: Who is the final electron acceptor for the ETC in Photosystem I?Solution! High energy electron carrier!!!

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 2: How can we replace the electrons lost by Photosystem I (PS I)?

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 2: How can we replace the electrons lost by Photosystem I (PS I)?

e-e-

The Light Reactions

PS II PS Ie-e-

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 2: How can we replace the electrons lost by Photosystem I (PS I)?

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 2: How can we replace the electrons lost by Photosystem I (PS I)?

e-e-

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 2: How can we replace the electrons lost by Photosystem I (PS I)?Solution! Take them from the ETC in PS II!

e-e-

e-e-

Problem 3: Who is the final electron acceptor for the ETC in PS II?

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 3: Who is the final electron acceptor for the ETC in PS II?

e-e-

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 3: Who is the final electron acceptor for the ETC in PS II?Solution! PS I!

e-e-

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

H2O

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

H2O

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

H2O

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2H+

e- e-

H+

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2H+

e- e-H+

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2H+

e- e-H+

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2

H+e- e-

H+

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2

H+

e- e-

H+

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

e-e-

e-e-

O2

H+

H+

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

Problem 4: How can we replace the electrons lost by Photosystem II (PS II)?

Solution! Snag them from WATER!

e-e-

e-e-

O2

H+

H+

e-e-

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

O2

H+

H+

e-e-

e-e-ATP

The Light Reactions

PS II PS I

H+

H+

H+

H+H+

H+

H+

H+

H+

H+

H+

H+

H+

e-e-

e-e-

O2

H+

H+

e-e-

ATP

To the Calvin Cycle!!!