TY - JOUR
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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U2 - 10.1016/0006-291X(81)91629-6
DO - 10.1016/0006-291X(81)91629-6
M3 - Article
C2 - 7306199
AN - SCOPUS:0019881918
SN - 0006-291X
VL - 102
SP - 944
EP - 951
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
IS - 3
ER -