Melatonin; Growth regulator and strong antioxidant in plants

Melatonin: circadian rhythm regulator, chronobiotic, antioxidant and beyond.

For many years, melatonin has been known to interact with circadian rhythms. New evidence indicates that melatonin acts as a free radical scavenger and antioxidant. Moreover, melatonin prevents apoptosis in different types of cells, because it induces mRNA levels of several antioxidant enzymes. It is evident that melatonin is involved in the cellular bioenergetic system as a mechanism that coun...

Editorial: Melatonin in Plants

Melatonin and plants

Preface Melatonin and plants Melatonin was initially considered as a signalling molecule only occurring in animals, but as further evidence emerged, it was recognized that it is a phylogenetically ancient molecule. Its presence can be traced to primitive photosynthetic bacteria, red and green algae, fungi, and plants. From an evolutionary point of view, a primary function of this molecule is as...

Effect of exogenous melatonin on growth, electrolyte leakage and antioxidant enzyme activity in rosemary under salinity stress

Melatonin is a new plant hormone that plays an important role in stress tolerance. For investigation the effect of exogenous application of melatonin on salt tolerance in rosemary (Rosmarinus officinalis L.), a factorial experiment was conducted in a completely randomized design with three replications. The first factor was melatonin (50, 100 µM) and the second factor was salinity stress (6, 9,...

Melatonin in feverfew and other medicinal plants.

1598 Vol 350 • November 29, 1997 35% relative to the first trimester, in contrast to the 16% average decrease in the years 1993–96. During the third trimester of 1997, the number of cases of diarrhoea decreased, yet were still 25% above the figures seen in previous years for the same trimester. In Peru and neighbouring countries affected by El Niño— Chile, Ecuador, and Colombia—we anticipate an...

Antioxidant and antimicrobial medicinal plants from Iran

The Objective of this research was determination of antioxidant and antimicrobial activities of different plants of the families lamiaceae including several salvia species and some plants of the family Compositae e.g. Onopordon, Centaurea from Iran. The radical scavenging activities of the above-mentioned plants were measured spectrophotometrically using DPPH (2, 2 dipheny-pycryl-hydrazyl). The...