نتایج جستجو برای: spiroplasma citri
تعداد نتایج: 2381 فیلتر نتایج به سال:
We propose that Group I spiroplasmas be subdivided into seven, rather than four, subgroups. The seven subgroups showed remarkable homogeneity when several representative strains were compared. Hybridization reactions between DNAs of representative strains within subgroups were generally at least 90 percent, and usually at least 80 percent co-migrating cell proteins were found. In addition, when...
In Spiroplasma citri, where homologous recombination is inefficient, specific gene targeting could only be achieved by using replicative, oriC plasmids. To improve the probability of selecting rare recombination events without fastidious, extensive passaging of the transformants, a new targeting vector was constructed, which was used to inactivate the crr gene encoding the IIA component of the ...
بدلیل شباهت علایم ظاهری بیماری های میوه سبز و استابورن مرکبات و عدم تشخیص نوع آلودگی درختان مبتلا به این بیماری ها به روش مشاهده ای، در این تحقیق سعی گردید میزان وقوع احتمالی هر کدام از عوامل بیمارگر مذکور و نیز عوامل فایتوپلاسمایی، در درختان پرتقال کرمان تعیین شود. برای ردیابی عامل بیماری میوه سبز مرکبات از جفت آغازگر oi1/oi2c در واکنش pcr استفاده گردید. همردیف سازی توالی نوکلئوتیدی یکی از این...
Stubborn disease of citrus is one of the main causes of quality deterioration of citrus fruits in Egypt. The early detection and the molecular characterization of the causal agent are vital for revealing its real distribution and for management. In 2011, several samples were collected at different times of the year from stubborn suspected symptomatic trees within the main citrus growing area in...
The phylogenetic position of the Mollicutes has been re-examined by using phosphoglycerate kinase (Pgk) amino acid sequences. Hitherto unpublished sequences from Mycoplasma mycoides subsp. mycoides, Mycoplasma hyopneumoniae and Spiroplasma citri were included in the analysis. Phylogenetic trees based on Pgk data indicated a monophyletic origin for the Mollicutes within the Firmicutes, whereas B...
Small-subunit rRNA sequences were determined for almost 50 species of mycoplasmas and their walled relatives, providing the basis for a phylogenetic systematic analysis of these organisms. Five groups of mycoplasmas per se were recognized (provisional names are given): the hominis group (which included species such as Mycoplasma hominis, Mycoplasma lipophilum, Mycoplasma pulmonis, and Mycoplasm...
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