نتایج جستجو برای: ulmi is more pathogenicity than o ulmi
تعداد نتایج: 8295779 فیلتر نتایج به سال:
cerato-ulmin is the most important toxin of fungal causal agents of dutch elm disease and its content is one of the most important factors to distinguish two species ophiostoma ulmi and o. novo-ulmi. with attention to the ophiostoma novo-ulmi is more pathogenicity than o. ulmi, this research was carried out to discuss the role of cerato-ulmin on pathogenicity of causal agent using measurement o...
An investigation was carried out in some areas of Golestan Province including: Loveh forest, Soosara, Daland forest park, Tooskestan; Gilan Province including Siahkal and Asalem forests; Arasbaran and landscape of urban trees during 1999–2007. In this investigation, based on some morphological, physiological and molecular characteristics and also comparison with standard isolates two species Op...
AIMS For Ophiostoma (Ceratocystis) ulmi, the ability to undergo morphological change is a crucial factor for its virulence. To gain an understanding of quorum-sensing activity in O. ulmi as it relates to yeast-mycelium dimorphism control, this study examines the effects of branched-chain amino acids as well as their fusel alcohols and fusel acids as quorum sensing molecules. METHODS AND RES...
به منظور بررسی گونه های عامل بیماری هلندی نارون، مطالعه ای بین سالهای87-1386 در برخی از مناطق استان گلستان نظیر پارک جنگلی دلند، لوه، سوسرا، توسکستان، جنگل های گیلان شامل سیاهکل و اسالم، ارسباران و همچنین مناطق فضای سبز شهری انجام شد. در این بررسی، براساس برخی خصوصیات مورفولوژیکی، فیزیولوژیکی و مولکولی و مقایسه با جدایه های تایید شده از سایر مناطق دنیا، دو گونه ophiostoma ulmi و o. novo-ulmi به...
dutch elm disease is one of the most destructive vascular wilt diseases in the world. ophiosatoma ulmi and o. novo-ulmi had been the most important causal agents of the dutch elm disease in the last century. so, in order to manage of disease, their identification and distinction is necessary. these fungal species were distinguished based on morphological, physiological and molecular characters....
سراتواُلمین مهم‌ترین توکسیـن عامل قارچی بیـماری مرگ هلندی نارون است و مقـدار آن یکی از مهم‌ترین عوامل تفکیـک دو گونه Ophiostoma ulmi و Ophiostoma novo-ulmi می‌باشد. با توجـه به این‌که گونـه O. novo-ulmi در مقایسه با گونه O. ulmi از شدت بیماری‌زایی بیشتری برخوردار است، در این تحقیق سعی شده است تا با اندازه‌گیری مقادیر سراتواُلمین جدایه‌های عامل بیماری و مقایسه با میزان بیماری‌زایی و توان جوانه‌زنی...
درخت آزاد، zelkova carpinifolia، یکی از درختان جنگلی در معرض تهدید است که به بیماری جهانی مرگ نارون مبتلا شده است. این بیماری توسط قارچ ophiostoma novo-ulmi ایجاد میشود. این تحقیق به منظور جداسازی، شناسایی و تعیین خصوصیت ژنهای پاسخ دهنده در برهمکنش درخت آزاد و قارچ o. novo-ulmi با استفاده از روش cdna-aflp انجام گرفت.
Despite our increasing recognition of the key role that microbes play in ecosystem processes (e.g., Giller et al. 1997; Mills and Bever 1998; van der Heijden et al. 1998), concern over the loss of biodiversity in ecological communities rarely focuses on microbes— particularly pathogenic microbes which are more often targeted for eradication than preservation (but see Windsor 1995). Yet it is be...
Dutch elm disease is caused by the fungal pathogen Ophiostoma novo-ulmi which is transmitted by the native elm bark beetle, Hylurgopinus rufipes. We have found that four semiochemicals (the monoterpene (-)-beta-pinene and the sesquiterpenes (-)-alpha-cubebene, (+)-spiroaxa-5,7-diene and (+)-delta-cadinene) from diseased American elms, Ulmus americana, synergistically attract H. rufipes, and tha...
The Canadian Ophiostoma Genome Project, which was initiated in 2001, is a collaborative effort between research teams in four different universities. Its general objective is to conduct a large-scale identification and analysis of genes controlling important aspects of the life cycle of Ophiostomatoid fungi. To this end, several expressed sequence tag (EST) libraries were obtained for the Dutch...
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