Oxydation peroxydative de l'acide indolyl-1 acétique par une peroxydase de Raifort. Influence du pH

1979 ◽  
Vol 57 (9) ◽  
pp. 1078-1082
Author(s):  
Annette Chappet ◽  
Martine Deschamps-Mudry ◽  
Dominique Job
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Equilibrium Constant ◽  
Indole 3 Acetic Acid ◽  
Medium Acidity

Contrary to indole-3-acetic acid, indole-1-acetic acid (I1AA) may be destroyed by horseradish isoperoxydase ‘c’ (HRPc) only in the presence of hydrogen peroxide. This peroxidative reaction depends on the enzyme and H2O2 concentrations and on the medium acidity. By calculation of the binding equilibrium constant of the HRPc–I1AA complex for different pH, it appears that enzyme affinity for this substrate is higher for the more acidic tested pH.

scholarly journals Hydrogen peroxide is a mediator of indole-3-acetic acid/horseradish peroxidase-induced apoptosis

FEBS Letters ◽  
2006 ◽  
Vol 580 (5) ◽  
pp. 1439-1446 ◽  
Author(s):  
Dong-Seok Kim ◽  
Sang-Eun Jeon ◽  
Yun-Mi Jeong ◽  
So-Young Kim ◽  
Sun-Bang Kwon ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Horseradish Peroxidase ◽  
Induced Apoptosis ◽  
Indole 3 Acetic Acid

Mitigation of arsenate toxicity by indole-3-acetic acid in brinjal roots: Plausible association with endogenous hydrogen peroxide

2020 ◽  
pp. 124336
Author(s):  
Saud Alamri ◽  
Manzer H. Siddiqui ◽  
Bishwajit Kumar Kushwaha ◽  
Vijay Pratap Singh ◽  
Hayssam M. Ali
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Indole 3 Acetic Acid

Elevated indole-3-acetic acid peroxidase activity is involved in the cadmium-induced hydrogen peroxide production in barley root tip

2010 ◽  
Vol 62 (1) ◽  
pp. 59-64 ◽  
Author(s):  
L’ubica Halušková ◽  
Katarína Valentovičová ◽  
Jana Huttová ◽  
Igor Mistrík ◽  
Ladislav Tamás
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Peroxidase Activity ◽  
Barley Root ◽  
Root Tip ◽  
Hydrogen Peroxide Production ◽  
Indole 3 Acetic Acid ◽  
Barley Root Tip

scholarly journals Liquid-liquid equilibrium constant for acetic acid in an olive oil-epoxidized olive oil-acetic acid-hydrogen peroxide-water system

2016 ◽  
Vol 70 (2) ◽  
pp. 165-175 ◽  
Author(s):  
Milovan Jankovic ◽  
Olga Govedarica ◽  
Snezana Sinadinovic-Fiser ◽  
Jelena Pavlicevic ◽  
Vesna Teofilovic ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Olive Oil ◽  
Equilibrium Constant ◽  
Water System ◽  
Liquid Equilibrium ◽  
Nrtl Model ◽  
In Situ Epoxidation ◽  
Flash Calculation ◽  
Activity Coefficient Models

The liquid-liquid equilibrium constant for acetic acid in a quinary system olive oil-epoxidized olive oil-acetic acid-hydrogen peroxide-water was experimentally determined for temperatures and component ratios relevant for in situ epoxidation of plant oils. The values has the constant range from 1.52 to 2.73. To predict the equilibrium constant for acetic acid, the experimental data were correlated with UNIQUAC (universal quasi chemical) and NRTL (non-random two liquid) activity coefficient models. For simplified calculation of the phase equilibrium the insolubility of olive oil and epoxidized olive oil in the water, as well as insolubility of water and hydrogen peroxide in the olive oil and epoxidized olive oil, was assumed. The root mean square deviation (RMSD) of the experimental and calculated values of the liquid-liquid equilibrium constant for acetic acid is 0.1910 for the UNIQUAC model and 0.1815 for the NRTL model. For rigorous flash calculation, when the partitioning of all components between the phases was assumed, the RMSD for the NRTL model is 0.1749.

scholarly journals Hydrogen Peroxide in the Enzymic Oxidation of Heteroauxin

1951 ◽  
Vol 4 (3) ◽  
pp. 293 ◽  
Author(s):  
PL Goldacre
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Enzymic Oxidation ◽  
Low Concentrations ◽  
Colloidal Platinum ◽  
Indole 3 Acetic Acid

A hydrogen peroxide-peroxidase system is essential to the enzymic oxidation of indole-3-acetic acid. Catalase and colloidal platinum inhibited strongly such oxidation, and extremely low concentrations of guaiacol competed with the LA.A. for the LA.A. oxidase.

The acute effect of copper on the levels of indole-3-acetic acid and lignin in peanut roots

2001 ◽  
Vol 28 (4) ◽  
pp. 329 ◽  
Author(s):  
Tsai-Chi Li ◽  
Teng-Yung Feng ◽  
Wen-Shaw Chen ◽  
Zin-Huang Liu
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Root Growth ◽  
Arachis Hypogaea ◽  
Lignin Content ◽  
Acute Effect ◽  
Significant Inhibition ◽  
Arachis Hypogaea L ◽  
Effect Of Copper ◽  
Indole 3 Acetic Acid

Cu-treated peanut (Arachis hypogaea L.) seedlings showeda significant inhibition in peanut root growth, and a decrease in endogenousindole-3-acetic acid (IAA) content. The decline of IAA content in Cu-treatedtissue was accompanied by an increase in the activity of cationic peroxidase(POD) isozyme P8.5, which was correlated with an increase in cationic PODtranscripts. Cu might suppress the growth of peanut roots by inducing thesynthesis of the cationic POD isozyme that degrades endogenous IAA. Theincrease in the activity of anionic POD isozyme P3.5 was correlated with therise in lignin content in Cu-treated roots. We suggest that the increase inanionic POD isozyme P3.5 induced by Cu might be responsible for ligninsynthesis in peanut roots, and may also remove excess hydrogen peroxide causedby Cu, thus playing a detoxifying role during Cu treatment.

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