In this research, plant diversity of ARTEMISIA SIEBERI habitats has been studied in Iran. The habitats situated in hammadas and alluvial plains of central plateau of Iran, with semi-arid, arid and hyper-arid climates. Altitude range of the habitats is 830–2350 m, annual precipitation range 59.5–350.1 mm and average of annual temperature 12.5–20.8°C. Plant specimens were collected from 34 A. SIEBERI habitats in 10 provinces within three vegetative seasons, 2005-2006. The specimens were determined in Central herbarium of Iran by using several floras. Their life forms were recognized according to Raunkiaer method. A total of 372 plant species were identified in A. SIEBERI habitats. They are including two gymnosperms, 318 dicotyledones and 52 monocotyledones, which belong to 42 families and 195 genera. Gymnosperms have one family and one genus, dicotyledones 34 families and 166 genera and monocotyledones seven families and 28 genera. Asteraceae (18%), Chenopodiaceae (10.2%), Fabaceae (8.9%) and Poaceae (7.8%) have the higher numbers of species, respectively. Therophytes with 40 % are the most frequent life form in A. SIEBERI habitats. Hemicryptophytes with 28.8% are situated after them.

Aims Bioproduction methods of nanoparticles are preferrabale to chemical and physical methods because of low energy and time expenditure. The aim of this study was to investigate the biological preparation of silver nanoparticles, using ARTEMISIA SIEBERI. Materials & Methods In this experimental study, the extract of ARTEMISIA SIEBERIhas was used to produce silver nanoparticles by a simple, non-toxic, and low-cost method. Formation of silver nanoparticles was established despite the presence of an absorption peak at 490nm, using spectrophotometer. The size and shape of silver nanoparticles were shown using scanning electron microscopy. Precise size and change range of nanoparticles were measured by Particle Size Analysis (PSA). FT-IR results also indicated the role of different functional groups in the synthetic process. Findings The change in the color of the extract from pale yellow to light brown and absorption peak at about 490nm showed production of silver nanoparticles. The silver nanoparticles were mainly spherical and their diameter was in the range of 27nm to 65nm, and in some regions, they were stacked or scattered together. The mean size of nanoparticles was 70nm and the dispersion of nanoparticles was in the range of 40nm to 140nm. Conclusion The silver nanoparticles derived from the ARTEMISIA are spherical and their mean size is about 70nm. Their dispersion is between 40nm and 140nm.

To evaluate the impact of different methods used and the amounts of nitrogen on some of the traits in ARTEMISIA herb, this study was conducted in Islamic Azad University was Shahr-e-Qods in 2010. Factorial experimental design as a randomized complete block with three replications. Treatments included application of nitrogen fertilizer in the soil in the solid form includes four levels of values 0, 100, 200 and 300 kg urea per hectare as well as sprayed on four levels, including levels 0, 6, 12 and 18 percent urea solution were. Urea sprayed on leaf stage, 10 plants were flowering and early stages. The results showed that application of nitrogen to the soil solids and sprayed on the percentage oil yield flowering branches, height and branch number was significant. Comparison showed that the highest average yield of flowering branches, height and number of branches of the combined application of 200 kg per hectare as urea sprayed on solid and 12 percent respectively. The highest percentage of essential oils combined application of 100 kg per hectare as urea sprayed on solid and six percent respectively. The test results showed that nitrogen application rates of nitrogen sprayed on the farm herb ARTEMISIA decreased but increased qualitative and quantitative traits that these results could be an important step towards sustainable agriculture is to achieve goals.

ARTEMISIA SIEBERI Besser is distributed in vast steppes of Iran. There are different opinions about the correct name of Iranian steppic ARTEMISIA. Some authors believe that the Iranian specimens are A. SIEBERI and the others A. herba-alba. Phytochemical studies of 34 populations of the species in Iran, A. herba-alba specimens of Spain and A. SIEBERI specimen of Palestine confirmed that the name of A. SIEBERI is correct.