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'Glutathione S Transferase' in keywords
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1999 (1)
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1991 (2)
1Author    Peter Schröder3, Andreas StampflbRequires cookie*
 Title    Visualization of Glutathione Conjugation and Inducibility of Glutathione S-Transferases in Onion {Allium cepa L.) Epidermal Tissue  
 Abstract    Fax: + 4 9 -8 9 -3 1 8 7 -3 3 8 3 . E-mail: peter.schroeder@GSF.de Glutathione conjugation of l-chloro-2,4-dinitrobenzene, l,2-dichloro-4-nitrobenzene, NBD-C1, monobromobimane and monochlorobimane was found to occur in epidermal tissue of onion bulbs (A llium cepa L.). Conjugation required the presence of glutathione S-transfer-ases (GST). In order to follow glutathione conjugation microscopically, bimanes were uti­ lized. M onochlorobimane was converted to a brightly fluorescing conjugate that was shown to be transported to the nucleus before sequestration in the vacuole occurred. GST activity was stimulated as well as induced by several electrophilic xenobiotics, by cycloheximide and by several glutathione conjugates. y-Glutamylcysteine conjugates that are formed during en­ zymatic cleavage of glutathione conjugates in plants, were not active as inducers of enzyme activity. In the light of the stimulating effects of xenobiotic glutathione conjugates on GST activity, it is concluded that glutathione conjugates may act as signal molecules. 
  Reference    Z. Naturforsch. 54c, 1033—1041 (1999); received August 2/September 3 1999 
  Published    1999 
  Keywords    Glutathione S-transferase, Xenobiotic Detoxification, Onion, Monochlorobimane, Glutathione Conjugate 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-1033.pdf 
 Identifier    ZNC-1999-54c-1033 
 Volume    54 
2Author    C.K C Ottingham, K. K. HatziosRequires cookie*
 Title    Influence of the Safener Benoxacor on the Metabolism of Metolachlor in Corn  
 Abstract    The herbicide safener benoxacor (CGA -154281) is effective in protecting corn from meto­ lachlor injury. Glutathione-S-transferase (GST) activity of corn seedlings was stimulated by low concentrations of benoxacor as was the formation of a polar metabolite identified as the glutathione (GSH) conjugate of metolachlor. A similar degree of enhancement of metolachlor metabolism was observed in both a metolachlor-tolerant ('Cargill 7567') and a metolachlor-susceptible ('Northrup-King 9283') corn line. The total GSH content o f shoots o f the meto-lachlor-susceptible corn hybrid was not affected by benoxacor treatment, but an increase was noted for shoots of the tolerant corn hybrid. The two corn hybrids with differential tolerance to metolachlor also differ in their dose response to benoxacor with higher safener concentra­ tions failing to induce or inhibit GST activity of the tolerant 'Cargill 7567' corn line. Stimula­ tion of GST activity and a corresponding enhanced rate of metolachlor metabolism can ac­ count for the safening effect of benoxacor. These mechanism of action of dichloroacetamide safeners. 
  Reference    Z. Naturforsch. 46c, 846—849 (1991); received March 26 1991 
  Published    1991 
  Keywords    Metolachlor, Glutathione-S-transferase, Glutathione, Benoxacor, Corn, Zeam ays L 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0846.pdf 
 Identifier    ZNC-1991-46c-0846 
 Volume    46 
3Author    JohnV. Dean, JohnW. Gronw, MichaelP. AndersonRequires cookie*
 Title    Glutathione S-Transferase Activity in Nontreated and CGA-154281- Treated Maize Shoots  
 Abstract    Fast protein liquid chromatography (anion exchange) was used to separate glutathione S-transferase isozymes in nontreated etiolated maize shoots and those treated with the herbi­ cide safener C G A -154281 4-(dichloroacetyl)-3,4-dihydro-3-methyl-2 H-l ,4-benzoxazine. Non­ treated shoots contained isozymes active with the following substrates: fra/?s-cinnamic acid (1 isozyme), atrazine (3 isozymes), l-chloro-2,4-dinitrobenzene (1 isozyme), metolachlor (2 isozymes) and the sulfoxide derivative of S-ethyl dipropylcarbamothioate (2 isozymes). Pre­ treatment of shoots with the safener C G A -154281 (1 (aM) had no effect on the activity of the isozymes selective for rratts-cinnamic acid and atrazine but increased the activity of the consti-tutively-expressed isozymes that exhibit activity with l-chloro-2,4-dinitrobenzene, metola­ chlor and the sulfoxide derivative of S-ethyl dipropylcarbamothioate. The safener pretreat­ ment also caused the appearance o f one new isozyme active with l-chloro-2,4-dinitrobenzene and one new isozyme active with metolachlor. The results illustrate the complexity of gluta­ thione S-transferase activity in etiolated maize shoots, and the selective enhancement of gluta­ thione S-transferase isozymes by the safener CG A -154281. 
  Reference    Z. Naturforsch. 46c, 850—855 (1991); received March 26 1991 
  Published    1991 
  Keywords    CG A-154281, Safener, Glutathione S-Transferase, Glutathione, Maize 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0850.pdf 
 Identifier    ZNC-1991-46c-0850 
 Volume    46 
4Author    Gabor Gullner, Tamäs Kömives, Richard GäborjänyiRequires cookie*
 Title    Differential Alterations of Glutathione S-Transferase Enzyme Activities in Three Sorghum Varieties Following Viral Infection  
  Reference    Z. Naturforsch. 50c, 459—460 (1995); received February 14/March 2 1995 
  Published    1995 
  Keywords    Glutathione S-Transferase, Sorghum bicolor L, Sorghum sudanense L, Sugarcane Mosaic Virus, Virus Infection 
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 TEI-XML for    default:Reihe_C/50/ZNC-1995-50c-0459_n.pdf 
 Identifier    ZNC-1995-50c-0459_n 
 Volume    50