نتایج جستجو برای: karaj. nit mutants were obtained from fast growing sectors on minimal medium (mm) containing 5
تعداد نتایج: 12212394 فیلتر نتایج به سال:
forty monoconidial isolates of magnaporthe grisea were examined, for an identification of vegetative compatibility group and a characterization of genetic diversity, using rep-pcr genomic fingerprinting. the isolates were collected from weeds digitaria sanguinalis (crabgrass), setaria italica (foxtail millet), echinochloa crus-galli (barnyard millet), and some other unknown ones during 2003 - 2...
thirty five monoconidial isolates of the fungal culture collection pyricularia grisea were examined, to identify the vegetative compatibility groups and characterize the genetic diversity of isolates as through rep-pcr genomic fingerprinting. the isolates were collected from ricefields during 1997-1999. genetic diversity of p. grisea isolates was studied as based on dna fingerprinting through r...
in the present study, vegetative compatibility groups (vcg) of 27 isolates of fusarium solani collected from root and crown of sugar beets of different provinces in iran were determined using nitrate non– utilizing (nit) mutants. totally, 222 nit mutants were generated from 27 isolates using pdc medium. based on the weak growth on basal medium containing one of four nitrogen sources the phenot...
introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...
glomerella cingulata is the causal agent of anthracnose disease on citrus that attacks weakened trees. the sexual stage is rare in nature but can be produced in laboratory under certain conditions. sixty-seven single-spore isolates were selected from citrus in mazandaran province to be used in this study. isolates were cultured on ypss for investigating heterothallism and homothallism. to under...
The heterokaryotic and vegetative diploid phases of Colletotrichum lindemuthianum are described using nutritional and biochemical markers. Nitrate non-utilizing mutants (nit), derived from R2047, R89, R73, R65, and R23 isolates, were paired in all possible combinations to obtain heterokaryons. Although pairings R2047/R89, R2047/R73, R65/R73, and R73/R23 showed complete vegetative incompatibilit...
abstract this study examines the effect of teaching lexical inferencing strategies on developing reading comprehension skill of iranian advanced efl learners. participants were female students of meraj and shokouh institudes of garmsar a quasi-experimental design using two intact advanced classes of efl students at meraj and shokouh institutes. as the first step, a general toefl proficiency te...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
In this investigation, Aspergillus niger isolated from eight food substances, have been classified based on the absence of heterokaryon formation. The size their sporangia were differentiated, wild and mutant strains subjected to vegetative compatibility tests in order group them into different groups (VCGs) which include VCG-1, VCG-2, VCG-3 VCG-4. further tested for possible formation a stable...
abstract: advertisements are the most accessible type of authentic materials, and this is one reason why they are used more and more in english teaching classes. for this cause, studies in the field of advertisements are very widespread nowadays. for pun is one aspect which makes advertisements more interesting, it is used more than before in advertisements. use of puns makes an advertisement m...
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