نتایج جستجو برای: sisymbrium
تعداد نتایج: 94 فیلتر نتایج به سال:
Essential oils of eucalyptus leaves and clove buds were isolated tested for their bioherbicidal potential on different annual weed species. Gas Chromatography-Mass Spectrophotometry analysis (GC-MS) identified thirteen compounds representing around 87.11% the total oil. The main constituent was 1,8-cineole, which accounted 68.15% compounds. As oil, eleven identified, 90.03% Eugenol dominant com...
چرای دام از مراتع می‌تواند منجر به تغییر ترکیب پوشش گیاهی شود. در این تحقیق اثر چهار شدت مختلف چرایی سنگین، متوسط، سبک و قرق (بدون چرا) بر شاخص‌های پوشش گیاهی به منظور اصلاح شیوه‌های مدیریتی و برنامه‌ریزی مناسب جهت بهره‌برداری پایدار از مراتع در منطقه کرسنک و بارده استان چهارمحال و بختیاری مورد بررسی قرار گرفت. بدین منظور نمونه‌برداری از پوشش گیاهی به صورت ثبت درصد تاج پوشش گونه‌های گیاهی در شد...
مشاهدات کروموزومی برای 17 گونه متعلق به 9 خانواده ارائه شده است. شمارش کروموزومی برای 6 گونه شامل : tanacetum polycephalum subsp. duderanum (asteraceae) (n=18), cardaria draba subsp. chalepensis (brassicaceae) (n=32), minuartia lineate (caryophyllaceae) (n=10), silene latifolia subsp. persica (caryophyllaceae) (n=12+1b), epilobium confusum (onagraceae) (n=10), and rumex scutatus (polygonaceae) ...
Salinity is an abiotic stress that limits both yield and the expansion of agricultural crops to new areas. In the last 20 years our basic understanding of the mechanisms underlying plant tolerance and adaptation to saline environments has greatly improved owing to active development of advanced tools in molecular, genomics, and bioinformatics analyses. However, the full potential of investigati...
in order to investigate factors affecting on seed germinating of london rocket (sisymbrium irio), lab experiments were set up in 2011 at the payamenoor university, mashhad, khorasan razavi province. effect of different concentrations of gibberellic acid (ga3) and cytokinin, wet and dry prechilling duration, hydrogen peroxide duration, ethanol, salt and osmotic stress and burial depth on seed ge...
The Brassicaceae is a large plant family (338 genera and 3,700 species) of major scientific and economic importance. The taxonomy of this group has been plagued by convergent evolution in nearly every morphological feature used to define tribes and genera. Phylogenetic analysis of 746 nrDNA internal transcribed spacer (ITS) sequences, representing 24 of the 25 currently recognized tribes, 146 g...
Selective foraging by granivores can have important consequences for the structure and composition of plant communities, and potentially severe consequences for rare plant species. To understand how granivore foraging behavior affects common and rare plant species, diet selection should be viewed relative to the availability of alternative seed options, and with consideration of the individual ...
After heavy rainfalls in late Apr. of 2010 in Tehran, an epizootic occurred amongst hoverflies (Eupeodes corollae Fabricius) population in green spaces of Iranian Research Institute of Plant Protection, caused by an entomopathogenic fungus. Infected flies fixed to the upper parts of whitetop (Lepidium draba L.) and small tumbleweed mustard (Sisymbrium loeslii L.) plants with their proboscis and...
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