TY - JOUR
T1 - A nitroxide diuron analog as a probe for the mode of action of herbicides
AU - Siderer, Yona
AU - Lavintman, Nelly
AU - Ohad, Itzhak
AU - Gilon, Chaim
PY - 1984/5/1
Y1 - 1984/5/1
N2 - A new spin label nitroxide which is also a herbicide of the urea family has been synthesized. The nitroxide spin label derivative of diuron (ditempuron, DTPU) inhibits electron flow at the site of diuron inhibition of photosystem II (PSII) activity, and it is also reduced by electron flow from one of the first acceptors of PSII. The reduction of the nitroxide group of DTPU is inhibited by diuron or by trypsin treatment of the thylakoids but not by DNP-INT or DBMIB. It is suggested that DTPU binds specifically to and accepts electrons at the QB site.
AB - A new spin label nitroxide which is also a herbicide of the urea family has been synthesized. The nitroxide spin label derivative of diuron (ditempuron, DTPU) inhibits electron flow at the site of diuron inhibition of photosystem II (PSII) activity, and it is also reduced by electron flow from one of the first acceptors of PSII. The reduction of the nitroxide group of DTPU is inhibited by diuron or by trypsin treatment of the thylakoids but not by DNP-INT or DBMIB. It is suggested that DTPU binds specifically to and accepts electrons at the QB site.
KW - Chlamydomonas
KW - Electron Spin Resonance
KW - Nitroxide Spin Label
KW - Photosynthesis Inhibitors
KW - Spinach Photosynthesis
UR - http://www.scopus.com/inward/record.url?scp=84935641088&partnerID=8YFLogxK
U2 - 10.1515/znc-1984-0505
DO - 10.1515/znc-1984-0505
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AN - SCOPUS:84935641088
SN - 0939-5075
VL - 39
SP - 342
EP - 346
JO - Zeitschrift fur Naturforschung - Section C Journal of Biosciences
JF - Zeitschrift fur Naturforschung - Section C Journal of Biosciences
IS - 5
ER -