in this experiment, effects of three polyamines (putrescine, spermidine and spermine) on postharvest life of plum fruit cv. ’shablon‘were studied. fruit was dipped in solution of polyamines with 1 and 2 mm and distilled water (control) for 5 min in a cold storage at 1.5±0.5°c and 80-85% rh. experiment was conducted in a factorial with a complete randomized design with 7 treatments and 6 storage...

in this research, we studied polyamines including putrescine (put), spermidine (spd) and spermine (spm) changes in three common bean (phaseolus vulgaris) genotypes, k-s-31167, ge-288 and naz under drought stress. our result showed steadily increase in putrescine (put) and spermine (spm) in all three genotypes.  ge-288 genotype showed decrease and then increasing in spermidine (spd) content but ...

In order to investigate the seasonal changes and the possible role of the free polyamines in the leaves and stems on the alternate bearing habit of the ‘Kinnow’ mandarin (Citrus reticulata Blanco) trees, a comparative study was conducted to analyze the levels of free polyamines  (putrescine, spermidine and spermine) in the leaves and stems tissues of “on” and &ldquo...

Polyamines--putrescine, spermidine, and spermine--are ubiquitous cellular components that play an important role in cell growth and differentiation. Using A431 cells, a cell line that overexpresses the epidermal growth factor (EGF) receptor, we found that polyamines modulate EGF-mediated growth inhibition. The natural polyamine, putrescine, was the most effective, followed by diamines containin...

This experiment aimed to investigate the effects of liquid metabolite (LM) produced by Lactobacillus plantarum and dietary putrescine (PUT) on growth, blood lipids, villus height (VH), crypt depth (CD) and polyamines (PAs) content of intestinal tissue and ileal digesta in chickens. Six treatments, replicated six time each, were factorial arrangements of two levels of LM (0 and 0.3%) and three l...

in order to study the effect of pre and postharvest polyamines spraying on increasing vase life of alstroemeria (alstroemeriaaurantica cv.sukari), an experimental was conducted on completely randomized factorial design with two types polyamines (putrescine, spermine) in four levels (zero, five, 10, 15 and 20 mg/l). results showed that, 20 mg/l of putrescine and spermine treatments increased vas...

Putrescine and spermidine uptake into carrot (Daucus carota L.) cells in culture was studied. The time course of uptake showed that the two polyamines were very quickly transported into the cells, reaching a maximum absorption within 1 minute. Increasing external polyamine concentrations up to 100 millimolar showed the existence of a biphasic system with different affinities at low and high pol...