Incubation of 3-d-old seedlings of Oryza sativa L. cv Arborio under anaerobic conditions, leads to a large increase in the titer of free putrescine while aerobic incubation causes a slight decrease. After 2 days, the putrescine level is about 2.5 times greater without oxygen than in air. The rice coleoptile also accumulates a large amount of bound putrescine and, to a lesser extent, spermidine ...

A biphasic increase of putrescine concentration occurs in rat hepatoma tissue culture cells induced to proliferate. DL-alpha-Methyl ornithine, a competitive inhibitor of ornithine decarboxylase ( L-ornithine carboxylyase, EC 4.1.1.7) of hepatoma tissue culture cells, blocks the usual increases of putrescine and spermidine concentrations in these cells, and causes a rapid fall in the levels of p...

Putrescine plays a distinct role in various types of biological functions all living organisms, as well environmental stress. The aim the study is to effect exogenous putrescine on physiological condition rice seeds investigated. Salt treatment resulted reduction speed germination, germination energy, energy percentage, final shoot and root length, plant dry weight, where proline content was re...

Putrescine was first isolated from putrifying meat and was thought of as a decomposition product; spermine was named from its occurrence in semen. These polyamines, however, are now known to have important roles in cell growth and differentiation. Their physiological significance can be studied by analyzing the consequences of depletion of the cellular polyamine content. The results include arr...

This experiment was carried out to determine the effects of putrescine and methyl jasmonate on lipid peroxidation and altering the peroxide hydrogen of peel and pulp of Valencia orange fruit. Orange fruits were treated with 0 (control), 2.5 and 5 mM putrescine, and 0 (control), 10 and 20 µM methyl jasmonate, then stored at 5±1 °C, 85-90% relative humidity for four months. Oranges treated with 5...

Plants activate antioxidant defense mechanisms under stress, which help maintaining the structural integrity of cell components and possibly reduces oxidative damage.  Low temperature stress leads to the production of reactive oxygen species and oxidative damage to plants. In this study, the effect of putrescine and proline on reducing the production of reactive oxygen species and increasing th...

Biogenic amines (BAs) are low molecular weight nitrogenous organic compounds with different biological activities. Putrescine, spermidine and spermine are essential for the development of the gut and immune system of newborns, and are all found in human milk. Little is known, however, about the role of histamine, tyramine or cadaverine in breast milk. Nor is it known whether mastitis alters the...

Putrescine can be converted to y-aminobutyraldehyde by enzymes from different sources (l-3). It. is generally believed that this conversion is catalyzed by a nonspecific diamine oxidase. The presence of such an enzyme in bacteria, however, has not been firmly established experimentally. We have previously reported that, in a mutant of Escherichia co& B selected to grow on putrescine as the sole...