scholarly journals Effects of Disalicylidenepropanediamines on Photosynthetic Electron Transport of Isolated Spinach Chloroplasts

1979 ◽  
Vol 63 (4) ◽  
pp. 605-608 ◽  
Author(s):  
Norbert Laasch ◽  
Werner Kaiser ◽  
Wolfgang Urbach
Keyword(s):  
Electron Transport ◽  
Photosynthetic Electron Transport ◽  
Spinach Chloroplasts

Characteristics of Cu deficiency-induced inhibition of photosynthetic electron transport in spinach chloroplasts

1987 ◽  
Vol 891 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Magdolna Droppa ◽  
Jiři Masojidek ◽  
Zsuzsanna Rózsa ◽  
Adam Wolak ◽  
LászlóI. Horváth ◽  
...  
Keyword(s):  
Electron Transport ◽  
Photosynthetic Electron Transport ◽  
Spinach Chloroplasts ◽  
Cu Deficiency

Mode of Inhibition of Photosynthetic Electron Transport by Substituted Diphenylethers

1981 ◽  
Vol 36 (9-10) ◽  
pp. 848-852 ◽  
Author(s):  
W. Draber ◽  
H. J. Knops ◽  
A. Trebst
Keyword(s):  
Electron Transport ◽  
Electron Flow ◽  
Photosynthetic Electron Transport ◽  
Thylakoid Membranes ◽  
Photosynthetic Electron Flow ◽  
Spinach Chloroplasts

Abstract Several substituted diphenylethers were found to be effective inhibitors of photosynthetic electron flow in isolated thylakoid membranes from spinach chloroplasts. T heir site of inhibition was localized with artificial acceptor and donor systems. The phenylether of an alkyl substituted nitrophenol is prim arely inhibiting electron flow after plastoquinone function whereas a dinitro-phenylether of a phenyl substituted nitrophenol is inhibiting before plastoquinone function. Therefore certain diphenylethers interfere with plastoquinone function at the oxidation or reduction site, depending on the substitution.

scholarly journals Reactions of substituted furo[3,2-b]pyrrole-5-carboxhydrazides and their biological activity

2005 ◽  
Vol 3 (4) ◽  
pp. 622-646 ◽  
Author(s):  
Renata Ga<parová ◽  
Daniel Zbojek ◽  
Margita Lácová ◽  
Katarína Král'ová ◽  
Anton Gatial ◽  
...  
Keyword(s):  
Biological Activity ◽  
Reaction Time ◽  
Electron Transport ◽  
Microwave Irradiation ◽  
Chlorophyll Content ◽  
Chlorella Vulgaris ◽  
Photosynthetic Electron Transport ◽  
Imidazole Derivatives ◽  
Spinach Chloroplasts

AbstractThe reactions of substituted furo[3,2-b]pyrrole-5-carboxhydrazides 1 with 5-arylfuran-2-carboxaldehydes 2, 4,5-disubstituted furan-2-carboxaldehydes 3 and thiophene-2-carboxaldehyde 4 has been studied. The advantage of microwave irradiation on some of these reactions was reflected in the reduced reaction time and increased yields. Reactions of 1 with 4-substituted 1,3-oxazol-5(4H)-ones 11 led to diacylhydrazines 13 or to imidazole derivatives 14 depending on the temperature. 1,2,4-Triazole-3-thione 17 was synthesized by two-step reaction of 1 with phenylisothiocyanate and subsequent base-catalyzed cyclization of thiosemicarbazide 16. The effects of hydrazones 5–10 on inhibition of photosynthetic electron transport in spinach chloroplasts and chlorophyll content in the antialgal suspensions of Chlorella vulgaris were investigated.

Die Wirkung 2.3-substituierter Naphthochinone auf einzellige Algen und isolierte Spinatchloroplasten/ The Effect of 2,3-Substituted Naphthoquinones on Unicellular Algae and Isolated Spinach Chloroplasts

1979 ◽  
Vol 34 (11) ◽  
pp. 961-963 ◽  
Author(s):  
Klaus Bauer ◽  
Helmu Kodier
Keyword(s):  
Electron Transport ◽  
Dark Respiration ◽  
Electron Flow ◽  
Photosynthetic Electron Transport ◽  
Flow Mode ◽  
Ps Ii ◽  
Spinach Chloroplasts ◽  
Ps I ◽  
Low Concentrations ◽  
Strong Stimulation

Abstract Short term effects of 2-(C-dichloro-acetylamino)-3-chloro-1,4-naphthoquinone (Hoe 13465, quinonamid*) and 2-amino-3-chloro-1,4-naphthoquinone (Hoe 17399, 06K-quinone) on cell suspensions of Chlorella vulgaris, Anabaena flos aquae, Porphyridium cruentum, and on isolated spinach chloroplasts were studied. The results clearly show that both substances inhibit the photosynthetic O2 production of algal suspensions as well as the electron transport of PS II in spinach chloroplasts. PS I is not inhibited by the action of the two algicides. At low concentrations quinonamid acts as a photosynthetic electron transport blocker, whereas Hoe 17399 is a weak inhibitor of photosynthetic electron flow. Mode of action of the two naphthoquinones is discussed. Both naphthoquinone derivatives can operate as an electron acceptor for PS I at low concentra­tions (10-5-10-6м). In addition there is observed a strong stimulation of dark respiration in algal cells induced by both of the compounds, Hoe 17399 causes a much higher stimulation rate than quinonamid does.

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