Site of electron acceptance by 3,6-dichloro-2,5-dimethoxy-p-benzoquinone and its relation to the bicarbonate effect on photosynthetic electron transport

G. Sarojini; Henry Daniell; Wim F.J. Vermaas

doi:10.1016/0006-291X(81)91629-6

Site of electron acceptance by 3,6-dichloro-2,5-dimethoxy-p-benzoquinone and its relation to the bicarbonate effect on photosynthetic electron transport

G. Sarojini, Henry Daniell, Wim F.J. Vermaas

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The photosystem II electron acceptor 3,6-dichloro-2,5-dimethoxy-p-benzoquinone [DCDMQ] is suggested to replace the second quinone-type two electron acceptor B (or R); the DCDMQ Hill reaction is sensitive to 3-(3,4-dichlorophenyl)-1,1-dimethylurea, but is insensitive to dry heptane extraction of thylakoids and other photosystem II inhibitors. Addition of HCO₃^- to CO₂-depleted thylakoids in silicomolybdate, DCDMQ, diaminodurene and ferricyanide Hill reactions brought about 1,3,10 and 10 fold increase in the electron transport rates; these data confirm that HCO₃^- affects both Q^- to B and B^2- to PQ reactions.

Original language	English (US)
Pages (from-to)	944-951
Number of pages	8
Journal	Biochemical and Biophysical Research Communications
Volume	102
Issue number	3
DOIs	https://doi.org/10.1016/0006-291X(81)91629-6
State	Published - Oct 15 1981
Externally published	Yes

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Cell Biology

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title = "Site of electron acceptance by 3,6-dichloro-2,5-dimethoxy-p-benzoquinone and its relation to the bicarbonate effect on photosynthetic electron transport",

abstract = "The photosystem II electron acceptor 3,6-dichloro-2,5-dimethoxy-p-benzoquinone [DCDMQ] is suggested to replace the second quinone-type two electron acceptor B (or R); the DCDMQ Hill reaction is sensitive to 3-(3,4-dichlorophenyl)-1,1-dimethylurea, but is insensitive to dry heptane extraction of thylakoids and other photosystem II inhibitors. Addition of HCO3- to CO2-depleted thylakoids in silicomolybdate, DCDMQ, diaminodurene and ferricyanide Hill reactions brought about 1,3,10 and 10 fold increase in the electron transport rates; these data confirm that HCO3- affects both Q- to B and B2- to PQ reactions.",

author = "G. Sarojini and Henry Daniell and Vermaas, {Wim F.J.}",

note = "Funding Information: DCMU (diuron), 2,4-dinitrophenyl ether of )3-); PQ, plastoquinone; PS II, ectron acceptor of photosystem TMPD, N,N,N',N'-tetramethyl-p- *This work was supported by an NSF grant (PCM 24532, G.S. and W.V. were supported by this grant.",

year = "1981",

month = oct,

day = "15",

doi = "10.1016/0006-291X(81)91629-6",

language = "English (US)",

volume = "102",

pages = "944--951",

journal = "Biochemical and Biophysical Research Communications",

issn = "0006-291X",

publisher = "Academic Press Inc.",

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T1 - Site of electron acceptance by 3,6-dichloro-2,5-dimethoxy-p-benzoquinone and its relation to the bicarbonate effect on photosynthetic electron transport

AU - Sarojini, G.

AU - Daniell, Henry

AU - Vermaas, Wim F.J.

N1 - Funding Information: DCMU (diuron), 2,4-dinitrophenyl ether of )3-); PQ, plastoquinone; PS II, ectron acceptor of photosystem TMPD, N,N,N',N'-tetramethyl-p- *This work was supported by an NSF grant (PCM 24532, G.S. and W.V. were supported by this grant.

PY - 1981/10/15

Y1 - 1981/10/15

N2 - The photosystem II electron acceptor 3,6-dichloro-2,5-dimethoxy-p-benzoquinone [DCDMQ] is suggested to replace the second quinone-type two electron acceptor B (or R); the DCDMQ Hill reaction is sensitive to 3-(3,4-dichlorophenyl)-1,1-dimethylurea, but is insensitive to dry heptane extraction of thylakoids and other photosystem II inhibitors. Addition of HCO3- to CO2-depleted thylakoids in silicomolybdate, DCDMQ, diaminodurene and ferricyanide Hill reactions brought about 1,3,10 and 10 fold increase in the electron transport rates; these data confirm that HCO3- affects both Q- to B and B2- to PQ reactions.

AB - The photosystem II electron acceptor 3,6-dichloro-2,5-dimethoxy-p-benzoquinone [DCDMQ] is suggested to replace the second quinone-type two electron acceptor B (or R); the DCDMQ Hill reaction is sensitive to 3-(3,4-dichlorophenyl)-1,1-dimethylurea, but is insensitive to dry heptane extraction of thylakoids and other photosystem II inhibitors. Addition of HCO3- to CO2-depleted thylakoids in silicomolybdate, DCDMQ, diaminodurene and ferricyanide Hill reactions brought about 1,3,10 and 10 fold increase in the electron transport rates; these data confirm that HCO3- affects both Q- to B and B2- to PQ reactions.

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JO - Biochemical and Biophysical Research Communications

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IS - 3

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Site of electron acceptance by 3,6-dichloro-2,5-dimethoxy-p-benzoquinone and its relation to the bicarbonate effect on photosynthetic electron transport

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