In the present study, the effect of seed priming with magnetic field (MF; 45, 90, 200 and 250mT for 5, 10, 20 and 30 min) was evaluated in 60-day-old Hyssopus officinalis plants grownunder 8 days irrigation intervals. The assessments were consisted of biomass, membranestability, photosynthetic pigments concentrations, polyphenols content, antioxidant enzymesactivities an...

A field experiment was conducted during two successive seasons 2010 and 2011 to determine the influence of rabbit manure rats( 5,10 and 15 m / fed.) and bio-fertilizers. The biofertilizer used was Bacillus sirculans (B.S) (used as seedlings inoculants) and vesicular arbuscular mycorrhizal fungi (VAM) (used as soil inoculants) and their interactions on periwinkle (Catharanthus roseus , L. G. Don...

The color of plants depends to a great extent on the conditions of nutrition. Approximately fifty years ago VILLE (7) attempted to determine the proper provision of plants with elements of nutrition by their color from the amount of chlorophyll produced. The pale color of plants may depend on various causes. In some cases it is called forth by an actual reduction of the amount of chlorophyll ow...

Sixteen samples of orange-red and yellow Fe-oxide earthy pigments mainly from bole grounds of Baroque paintings were studied by elemental and phase analysis and voltammetry. Fe, K, and Ti content were found to be suitable for further classification of those earthy pigments. According to the chemical and phase composition the yellow grounds were natural yellow ochres formed by intense chemical w...

Transgenic tobacco plants (M51-1) constitutively over-expressing a modified gene for the proline biosynthetic enzyme ∆-pyrroline-5-carboxylate synthetase (P5CSF129A) and the corresponding wild-type plants (WT) were compared during drought or heat stress and under combination of both stresses. The proline content in M51-1 was several times higher than in WT plants. Under optimal conditions, the ...

Some floral pigments (including antioxidants); carotenoids, chlorophylls, anthocyanins and xanthophylls were determined colorimetrically in some honeybee, Apis mellifera L., products; citrus, clover and cotton honeys, three types of beeswax; white, brown and dark and propolis; brown, dark brown and dark. Two solvents (acetone or ethanol) were used for extraction and determination of pigments at...

The pigment content in microalgae is a specific feature of each species. Its evaluation is essential as an indirect measure of cell growth, as well as a parameter to check the trophic level of waters. Several methods can be found in literature, most of them based on spectrophotometric analyses, referred as a good and practical tool for chlorophyll evaluation. A comparison of different methods t...