Showing papers on "Mimosine published in 2006"

Mimosine in Leucaena as a potent bio-herbicide

Abstract: Mimosine [a-amino-β-(3-hydroxy-4-oxo-l,4-dihydropyridin-1-yl)-propanoic acid] is a major constituent of Leucaena (Leucaena leucocephala de Wit) and responsible for the strong allelopathic potential of the legume tree. Mimosine showed strong herbicidal activities on six plants in a bioassay. All plant parts of Leucaena contain mimosine. The quantity of mimosine in the young leaves and mature seeds was the greatest, 2.66 and 2.38% of dry weight, respectively, while the quantity in the root xylems and xylems was the lowest: 0.18 and 0.11% of dry weight, respectively. Younger plant parts of Leucaena contained greater amounts of mimosine than the mature parts. Mimosine released from young parts and the seeds of Leucaena was proportional to the quantity of soaking water. Compared with the mature seeds, other mature parts of the plant did not give any mimosine through exuding. In soil to which mimosine was added, about 60% of the mimosine was adsorbed in 1-5 days, and only a minor volume of mimosine was decomposed: 5.30 and 0.16% after 1 and 5 days, respectively. Using a mixture of FeCl 3 and mimosine in a 4:6 ratio may be the most effective and economical method of lowering the toxicity of mimosine in Leucaena leaves, giving a safer cattle feed and decreasing the soil toxicity caused by mimosine in areas where Leucaena is grown. On the other hand, the incorporation of mimosine leaves into cultivated soils may be helpful for the biological control of weeds. The findings of this research reveal that mimosine may be useful for the development of bio-herbicides.

Selective determination of mimosine and its dihydroxypyridinyl derivative in plant systems

Abstract: Our observations on the growth stimulatory nature of mimosine, (β-(3-hydroxy-4-pyridon-1-yl)-L-alanine), the toxic non-protein plant amino acid, in some model experimental systems, warranted sensitive and selective routine estimations. For the determination of both mimosine and DHP, an indirect spectrophotometric method was developed based on their individual reaction with known excess of DZSAM and by estimating the remaining DZSAM with N-(1-naphthyl)ethylene-diamine (NEDA). The resultant decrease in the secondary coupled product was measured at 540 nm. On equimolar basis, DHP had 40% of the reactivity of mimosine while interference from other relevant compounds was 15–35%. The determination of mimosine and DHP in tissue samples under different physiological conditions was effected after paper chromatographic separation of mimosine and DHP with distinctly differing Rf, from other compounds. The indirect method is superior in terms of absolute selectivity, sensitivity and ease of applicability with linear decreases in absorbance, proportional to increasing concentrations of mimosine from 0.1 to 0.75 μM or DHP from 0.2 to 1.5 μM and with recoveries of 99.2 to 100.5%.

G1/S phase synchronization using mimosine arrest.

Abstract: INTRODUCTIONThis protocol uses the plant amino acid mimosine as a G(1)/S synchronizing agent. Cells are first treated with excess thymidine to accumulate the majority of them at G(1)/S; however, some cells will have stopped growth within the S phase. Thymidine is then removed to allow all the cells to proceed completely through the S phase. Mimosine is then added to arrest the cells at the G(1)/S border. When mimosine is removed, cells will begin to enter S phase within about 1 hour.

Advances on Studies of Leucaena Bentham in China

Abstract: The advances were reviewed in application of Leucaena Bentham for fodder, green manure and fuel wood, forest and plant restoration, culturing of edible fungi, and health care, and in studies of mimosine and detoxication, pests and diseases, breeding and rooting system of Leucaena.

Determination of Mimosine in Mimosa invisa Mart. and Effect of Ensiling

Abstract: Mimosa in visa Mart (F-Mimosaceae) an alien invasive weed, which was first reported from Kerala in 1964, has emerged as a problem invasive weed adversely affecting the biodiversity and causing toxicity problems to animals The toxic amino acid, mimosine, present in the plant is an anti nutritional factor contributing to clinical cases of toxicity in livestock The mimosine content in M invisa was the highest (92%) at active vegetative stage Among plant parts, content was highest (104%) in the immature leaves Ensiling the M invisa admixed with fodder grass in different proportions ranging from 10 to 90% for 60 days lowered the mimosine content by 32 to 46%