LIVRO Plant Ecology
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LIVRO Plant Ecology


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NADPH + H
EpoxidaseDe-epoxidase
Thylakoid lumen
pH 5.0
Ascorbate
Stroma
pH 7.5 -8.0
+ H2O
Dehydro-
ascorbate
Ascorbate
Dehydro-
ascorbate
Zeaxanthin
NADPH + H
+ O2
Violaxanthin
H3C CH3
CH3HO
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CH3H3C
H3C HO
O
Antheraxanthin
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O
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H3C OH
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NADP + H2O
+ O2
+ H2O
+
+
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+
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Lutein
200
160
120
80
40
40
0 1 2 3 4 5 6 7 40 1 2 3 4 5 6 7
Neoxanthin
V + A + Z
Days in full sunlight
(58 mol photons m-2 d-1)
Days in shade
(3.6 mol photons m-2 d-1)
Lutein
Neoxanthin
V + A + Z
A B
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Control
Spring 1995
Strong drought stress
Summer 1994
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