Results 161 to 170 of about 842,300 (197)

Effects of temperature and photosynthetic inhibitors on light activation of C4-phosphoenolpyruvate carboxylase

Photosynthesis Research, 1988
Phosphoenolpyruvate carboxylase from leaves of the C4 plant Setaria verticillata (L.) Beauv. is activated by light; day levels of activity are reached after 30 minutes of illumination. Photoactivation is prevented by inhibitors of photosynthetic electron flow or of photophosphorylation and by D,L-glyceraldehyde, which inhibits the reductive pentose ...
Y, Samaras, Y, Manetas, N A, Gavalas
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Replacement of photosynthetic electron transport inhibitors by silicomolybdate

Physiologia Plantarum, 1982
KCN‐treated spinach chloroplasts, their photosystem I being ineffective, exhibit a single reaction site for silicomolybdate. Using this heteropolyanion as electron acceptor, photosynthetic oxygen evolution is partially inhibited by ureas, triazines, or phenylpyridazinone herbicides, their inhibitory effect depending on the concentration of ...
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Relationship between inhibitor binding by chloroplasts and inhibition of photosynthetic electron transport

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1977
The binding of radioactively labelled atrazin, metribuzin and phenmedipham by broken chloroplasts was studied. From the double-reciprocal plots (bound vs. free inhibitors) a high affinity binding reaction is graphically isolated which is related to the inhibition of photosynthetic electron transport.
W, Tischer, H, Strotmann
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Derivatives of diterpen labdane-8α,15-diol as photosynthetic inhibitors in spinach chloroplasts and growth plant inhibitors

Journal of Photochemistry and Photobiology B: Biology, 2013
In a search of new efficient herbicides of natural origin, four derivatives were prepared from labdane-8α,15-diol (1) and 15-O-acetyl-8α-hydroxy labdane (2) isolated from Croton ciliatoglanduliferus. Their inhibitory activity on photosynthetic electron transport on fresh, broken spinach chloroplasts and on the growth of plants were determined ...
Félix, Morales-Flores, María Isabel, Aguilar, Beatriz, King-Díaz, Blas, Lotina-Hennsen   +3 more
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Possible mode of action of a photosynthetic inhibitor produced byPandorina morum

Archives of Microbiology, 1974
The mode of action of the photosynthetic inhibitor produced byPandorina morum was examined by exposingVolvox globator and isolated spinach chloroplasts to a partially purified inhibitor preparation. Oxygen evolution ofVolvox, whole chloroplasts, and broken chloroplasts (-Calvin cycle) was reduced indicating that the substances inhibit the light ...
Denny O. Harris, C. David Caldwell
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Influence of photosynthetic inhibitors on peach

2020
Several photosynthetic inhibitors were screened for relative photosynthetic reduction on leaves of greenhouse-grown peach trees. The most effective were 8% Vapor Gard, 10M diurcn, 10⁻³M ABA, and 10⁻³M terbacil, all of which reduced net photosynthesis (Pn) rates by 50% or more by 1 day after treatment without causing excessive phytotoxicity.
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Nature of the Receptor Site for Photosynthetic Electron Transport Inhibitors

1984
Recently, a new group of Hill inhibitor herbicides, the 3-methylphenylamino2-cyanoacrylic acid esters (I, R1 = phenyl; R2 = methyl; R3 = alkyl) have been reported (Huppatz et al. 1981). Further studies have show that Hill inhibitory activity, as measured by pI50 values using pea chloroplast suspensions (Brown et al.
John N. Phillips, John L. Huppatz
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Sites of action of photosynthetic inhibitor herbicides; Experiments with trypsinated chloroplasts

Pesticide Science, 1979
AbstractThe effect of four photosynthetic inhibitor herbicides, bromacil, ioxynil, metribuzin and monuron, on chloroplast electron transport was investigated. All four compounds completely inhibited electron flow with tripotassium hexacyanoferrate as oxidant, but the inhibition caused by bromacil, metribuzin and monuron was almost totally reversed by ...
Kenneth E. Pallett, Alan D. Dodge
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Effects of the Photosynthetic Inhibitors on the Respiration of Yeast Mitochondria

The Journal of Biochemistry, 1968
A, Hachimori, Y, Nosoh, N, Sone
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Activators and inhibitors of photosynthetic enzymes from Rumex dentatus cotyledons

Journal of Plant Physiology, 2001
Summary The activities of ribulose-1,5-bisphosphate carboxylase (EC, 4.1.1.39), phosphoenolpyruvate carboxylase (EC, 4.1.1.31), NADP-glyceraldehyde-3-phosphate dehydrogenase (EC, 1.1.1.8), pyruvate orthophosphate dikinase (EC, 2.7.9.1), and NADP-malate dehydrogenase (EC, 1.1.1.82) were measured in the cotyledons of Rumex dentatus .
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