نتایج جستجو برای: قارچ fusarium culmorum
تعداد نتایج: 20946 فیلتر نتایج به سال:
عوامل پوسیدگی ریشه و طوقه گندم در مناطق مختلف متفاوت هستند. این عوامل به دلیل ظهور دیر هنگام علائم بیماری، پنهان بودن از دید زارع و کارشناسان و خاکزی بودن عوامل آن، خسارت فراوانی به محصول وارد می آورند. در این پژوهش طی سه سال متوالی (90-1388) از بوته های آلوده در مزارع گندم منطقه گرگان در مراحل مختلف رشدی، به فاصله هر 2 کیلومتر و به صورت تصادفی نمونه برداری شدند. نمونه ها به آزمایشگاه منتقل و م...
background: identification and quantification of mycotoxins produced by fusarium species are important in controlling fungal diseases. objectives: potential of zearalenone, butenolide and fusarin c production was investigated in five fusarium graminearum and five f. culmorum isolates at molecular level. materials and methods: presence of pks13, fg08079.1 and pks10 genes, associated with product...
Chemical analysis of the culture filtrates of Fusarium culmorum CMI 14764 has demonstrated the presence of seven trichothecene mycotoxins. Major metabolites are 3-acetyldeoxynivalenol and 7 alpha, 8 alpha-dihydroxycalonectrin, with 3,15-diacetyldeoxynivalenol, deoxynivalenol, calonectrin, isotrichodermin and 12,13-epoxytrichothec-9-ene (EPT) as minor products. The occurrence of the rarely encou...
Fusarium culmorum is one of the species causing Fusarium head blight (FHB) in cereals in Europe. We aimed to investigate the association between the nucleotide diversity of ten F. culmorum candidate genes and field ratings of aggressiveness in winter rye. A total of 100 F. culmorum isolates collected from natural infections were phenotyped for FHB at two locations and two years. Variance compon...
The Effect of Drought Stresses, Fusarium Culmorum and Heterodera Filipjevi their Interactions on the Expression Pattern Transcription Factor Gene NAC69-3 in Bread Wheat
The aim of this research was to study the antifungal properties of propionibacteria. Three fractions from cultures of Propionibacterium freudenreichii ssp. shermanii 41 and ssp. freudenreichii 111 (i.e. culture containing viable bacteria, cell-free supernatant and bacteriocin preparation) were tested for their ability to inhibit the growth and mycotoxin production of Alternaria alternata, Fusar...
بلایت فوزاریومی سنبله یکی از مهم ترین بیماری های موجود در غلات در سطح جهان می باشد. این بیماری منجر به کاهش تولید محصول در مزرعه، کاهش کیفیت دانه و آلودگی دانه با مایکوتوکسین ها می گردد. بررسی حاضر به منظور تعیین تیپ های شیمیایی تولید شده توسط جدایه های قارچ fusarium culmorum جداسازی شده از مزارع گندم استان آذربایجان غربی با استفاده از ردیابی ژن-های tri13 و tri7 صورت پذیرفته است. نمونه برداری د...
Fusarium graminearum and F. culmorum are the causing agents of a destructive disease known as Fusarium head blight (FHB). FHB is a re-emerging disease in small grain cereals which impairs both the grain yield and the quality. Most serious consequence is the contamination of grain with Fusarium mycotoxins that are severe threat to humans and animals. Biological control has been suggested as one ...
Bilobetin and 4'''-O-methylamentoflavone were isolated and identified in the needles of Taxus baccata, for the first time in this species. The antifungal activity of biflavones from T. baccata and Ginkgo biloba, namely amentoflavone, 7-O-methylamentoflavone, bilobetin, ginkgetin, sciadopitysin and 2,3-dihydrosciadopitysin towards the fungi Alternaria alternata, Fusarium culmorum, Cladosporium o...
UNLABELLED During a screening for potential plant disease control actinomycetes, a total of 133 strains were isolated from Saharan soil samples of seven Algerian regions by dilution technique on chitin-vitamins agar medium. Screening for antagonistic properties using streak assay method showed that 25% of isolates demonstrated strong activities against a wide range of plant pathogenic fungi. Du...
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