نتایج جستجو برای: genus rubus
تعداد نتایج: 141623 فیلتر نتایج به سال:
Here, we present the genome of a strain of Erwinia amylovora, the fire blight pathogen, with pathogenicity restricted to Rubus spp. Comparative genomics of ATCC BAA-2158 with E. amylovora strains from non-Rubus hosts identified significant genetic differences but support the inclusion of this strain within the species E. amylovora.
چکیده: کنه های خانواده tenuipalpidae گیاهخوار و دارای انتشار جهانی هستند. این گروه از کنه ها به انواع درختان میوه، گیاهان و درختچه های زینتی و درختان جنگلی حمله نموده و علاوه بر تغذیه از شیره گیاهی و تخریب کلروفیل برگ در انتقال بیماریهای ویروسی به گیاهان نقش دارند. لذا شناسایی و مطالعه آنها حائز اهمیت است. در این پژوهش که طی سالهای 90-1389 انجام شد ضمن بررسی فونستیک کنه های تارتن دروغین استان ...
در تحقیق حاضر رده¬بندی زنبورهای خانواده¬های heloridae و proctotrupidae (hymenoptera: proctotrupoidea) در شمال مرکزی ایران (استان¬های البرز، تهران، قزوین، گیلان و مازندران) مورد بررسی قرار گرفت. نمونه برداری با استفاده از تله مالیز طی سال¬های 1389–1390 از بخش¬های مختلف انجام شد. طی این تحقیق 2 گونه از خانواده¬ی heloridae و 12 گونه متعلق به 6 جنس از خانواده¬ی proctotrupidae شناسایی شدند. تمام جنس...
At least two lineages of Mesozoic birds are known to have possessed a distinct feather morphotype for which there is no neornithine (modern) equivalent. The early stepwise evolution of apparently modern feathers occurred within Maniraptora, basal to the avian transition, with asymmetrical pennaceous feathers suited for flight present in the most basal recognized avian, Archaeopteryx lithographi...
Raspberries composed of various varieties, are popular ingredients of daily diet with highly distinguished biological activities. In this study, a comparative investigation was conducted on various chemical potential of methanol extracts from Rubus loganobaccus L. leaf parts cultured in greenhouse and open-field. Biochemical activity of the extracts obtained from the field cul...
Humans are interested in the knowledge of pollen loads composition due to their nutritional value and therapeutical benefits. Its palynological composition depends on the local flora surrounding the beehive. So, the presence of a specific composition of pollen types in a sample indicates its geographical origin. Currently, pollen origin is manually determined by an expert palynologist counting ...
Seed germination in plant species consumed by opossums, genus Didelphis, was investigated in southern Brazil, in order to improve knowledge of the strategies of zoochorous plants in the Neotropics. Seeds were obtained from opossum feces. Thirteen of the most frequent species in the diet of local opossums were tested for germination rates and germination responses under different qualities (red/...
Dichloromethane and/or ethanol extracts of 30 plants used as traditional medicines in Bukoba district, northwestern Tanzania were evaluated for brine shrimp toxicity. Among the 50 extracts tested, 32 extracts (64%) showed very low toxicity with LC50 values above 100 microg/ml. Among these 12 (24%) which had LC50 >500 microg/ml can be categorized as being practically non-toxic. Among the remaini...
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