نتایج جستجو برای: bromus persicus
تعداد نتایج: 2215 فیلتر نتایج به سال:
پژوهش حاضر به مطالعۀ کلادیستیک ریختشناسی طایفۀ مونوتیپیک Bromeae و جنس Bromus میپردازد. برای تعیین حدود جنس و روابط بین گونهها و بخشها، 39 تاکسون معرف 6 بخش از جنس Bromus به همراه 2 تاکسون برونگروه ارزیابی شدند. تحلیلهای فیلوژنی برای 26 صفت باارزش ریختشناسی به روش بیشینۀ صرفهجویی و جستجوی ابتکاری تعبیهشده در نرمافزار PAUP* انجام شدند. ماتریس دادهها با روش وزندهی دوبارۀ صفتها و شاخص...
Species composition, relative abundance, absolute abundance and biomass of sturgeon species were studied during the years 2008-2009. Eighty five stations were covered in the stratified random sampling design in depths less than 1Om using 9m bottom trawl (head line) and in depths more than 10m using 24.7m bottom trawl (head line). More than 70 specimens of Acipenser persicus were caught during t...
Bromus tectorum L. is an invasive winter annual grass naturalized across the United States. Numerous studies have investigated B. tectorum population structure and genetics in the context of B. tectorum as an ecological invader of natural areas and rangeland. Despite the wealth of information regarding B. tectorum, previous studies have not focused on, or made comparisons to, B. tectorum as it ...
گونه bromus arvensis که از شمال غربی ایران منطقه آذربایجان جمع آوری گردیده، برای اولین بار از ایران گزارش می شود. این گونه با گونه نزدیک خود b. brachytachys مقایسه می شود
Fish skin is essential for survival, maintenance of body shape, and protection against the shock and infection. During week 1 of sturgeon larval development, the epidermis is thin and not differentiated in various layers yet, but by week 4-6 the thickness increases and various layers appear, depending upon the region of the body. Mucous cells differentiate early in development on the surface of...
Exogenous nitrogen (N) inputs greatly change the emission and uptake of carbon dioxide (CO2) methane (CH4) from temperate grassland soils, thereby affecting (C) budget regional terrestrial ecosystems. Relevant research focused on natural grassland, but effects N fertilization C exchange fluxes different forage soils driving mechanisms were poorly understood. Here, a three-year addition experime...
Cells of the terrestrial plant species bromegrass (Bromus inermis L.) are not naturally adapted to withstand the hydrostatic pressures encountered in aquatic environments. However, after treatment with the natural plant growth hormone abscisic acid (75 micromolar), bromegrass cells survived a hydrostatic pressure of 101.3 megapascals, approximating the limits of ocean depth (10,860 m). The incr...
Background: Argas persicus has a great importance for health and veterinary, it can transmit many infectious agents such as Borrelia anserina (avian spirochetosis) and Aegyptianella pullorum. Distinguishing Argasidae due to close morphological relationship is difficult. OBJECTIVES: In the present study, we performed molecular analyses based on PCR and sequencing of Amplicon derived from 16S rRN...
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