ZfN: Search Results

1	Author	Jean-M Arc, D. Ucruet, Rene Scalla	Requires cookie*
	Title	Action of Methylthiopyrimidine Experimental Herbicides as Diuron-Like Inhibitors of Photosynthesis
	Abstract	Derivatives of 6-chloro-5-methylthiopyrimidines provide potent inhibitors of the photosynthe tic electron flow, which act like Diuron on fluorescence induction kinetics and competitively displace it from its binding site. Structure-activity relationships show that, unlike triazines, ac tivities of 2-or 4-alkylamino derivatives are restricted by steric hindrances. Decreases in inhibit ory activities of these compounds observed in triazine-resistant chloroplasts are lower than de creases reported for triazines themselves.
	Reference	Z. Naturforsch. 40c, 388 (1985); received October 31 1984/February 1 1985
	Published	1985
	Keywords	Methylthiopyrimidines, Diuron-Like Inhibitors, Photosynthesis, Structure-Activity Correlations, Photosystem II
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	TEI-XML for	default:Reihe_C/40/ZNC-1985-40c-0388.pdf
	Identifier	ZNC-1985-40c-0388
	Volume	40

2	Author	M. Tevini, K. Pfister	Requires cookie*
	Title	Inhibition of Photosystem II by UV-B-Radiation
	Abstract	The effect o f UV-B-radiation on PSII activity o f spinach chloroplasts was analyzed by m ea suring the integrity o f the herbicide-binding protein (H BP 32), by m easurem ent o f fluorescence induction in the presence o f Diuron (D C M U), and by m athem atical analysis o f the fluorescence induction curves. It was shown that UV-B inactivates the PSII a-centers but not PSII ^-centers. However, the possibility cannot be excluded that in add ition the donor site o f PSII near the reaction center is attacked by UV-B-radiation.
	Reference	Z. Naturforsch. 40c, 129—133 (1985); received N ovem ber 7 1984
	Published	1985
	Keywords	Photosystem II, Variable Fluorescence, R eaction Centers, Spinach Chloroplasts, U V -B-R adiation
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	TEI-XML for	default:Reihe_C/40/ZNC-1985-40c-0129.pdf
	Identifier	ZNC-1985-40c-0129
	Volume	40