Emerson:

Far-red light alone is insufficient in driving photosynthesis

＞ 680 nmAccessory pigments

Red drop effect Enhancement effect

Two photochemical complexes

Z scheme

distinct antenna pigments and photochemical reaction center

NADH structure

96T oral exam

Yz: a tyrosine residue of D1Pheophytin (Pheo)

Plastoquinones (QA and QB)

Cytochrome b6f complexPlastocyanin (PC): a soluble Cu protein

A0: a chlorophyll

A1: a quinone

Membrane bound Fe-S proteins

Fd: a soluble ferredoxin

FNR: soluble ferredoxin-NADP reductase

cyclic e- flowATP synthesis,no NADPH formation

p.140

Chloroplast: contains its own DNA, RNA, and ribosomes

Essay 7.1 (2006)A Novel View of Chloroplast Structure: dynamic

5 m

Trends in Plant Science (02) 7: 183

2 NADPH, 3 ATP / 8 photons

Light absorption vs. photoinduced charge separation

Stryer

heat releaseheat release

excited e- is transferred to a secondary acceptor

re-reduced by a secondary donor

Photon → e- rearrangement in the reaction center → e- transfer

photon energy → redox (e-) energy

A very rapid series of charge separation

→ capture light energy

Reaction center chlorophyll