نتایج جستجو برای: rust fungi
تعداد نتایج: 50329 فیلتر نتایج به سال:
Rust fungi are some of the most devastating pathogens of crop plants. They are obligate biotrophs, which extract nutrients only from living plant tissues and cannot grow apart from their hosts. Their lifestyle has slowed the dissection of molecular mechanisms underlying host invasion and avoidance or suppression of plant innate immunity. We sequenced the 101-Mb genome of Melampsora larici-popul...
Rust fungi, obligate biotrophs that cause disease and yield losses in crops such as cereals and soybean (Glycine max), obtain nutrients from the host through haustoria, which are specialized structures that develop within host cells. Resistance of flax (Linum usitatissimum) to flax rust (Melampsora lini) involves the induction of a hypersensitive cell death response at haustoria formation sites...
Most rust fungi have a complex life cycle involving up to five different spore-producing stages. The telial stage that produces melanized overwintering teliospores is one of these and plays a fundamental role for generating genetic diversity as karyogamy and meiosis occur at that stage. Despite the importance of telia for the rust life cycle, almost nothing is known about the fungal genetic pro...
HARDER, D. E., CHONG, 1., RoHRJNGER, R., MENDGEN, K., SCHNEIDER, A., WELTER, K., and KNAUF, G. 1989. lTItrastructure and cytochemistry of extramural substances associated with intercellular hyphae of several rust fungi. Can. J. Bot. 67: 2043-205l. Several types of extramural substance(s) associated with rust fungal intercellular hyphae were identified using a variety of tissue processing techni...
M any destructive crop diseases are caused by filamentous microbes from the kingdoms Fungi (e.g., ascomycetes and basidomycetes) and Stramenopila (oomycetes). Many of these pathogens exploit plants by extracting nutrients from living plant cells (biotrophy) (1). In some cases, biotrophic pathogens have evolved to a state of absolute dependency on their hosts. These obligate biotrophs have lost ...
Acacia koa (koa), among the most prominent overstory species of native Hawaiian forests, is affected by a number of diseases, including those caused by rust fungi, wood-rotting fungi, root-infecting fungi, and diseases categorized as seedling blights, foliar infections, and vascular wilts. A number of fungi occurring saprophytically on koa substrates are also known. Symptoms of other apparent d...
Tuberculina species are mitosporic parasites of rust fungi. It was demonstrated recently that Tuberculina represents the asexual life stage of the plant-parasitic genus Helicobasidium. Here we reveal the host specificities of Tuberculina and Helicobasidium species on rust fungal hosts by means of infection experiments and molecular analyses. We inoculated species of the rust genera Chrysomyxa, ...
Rice (Oryza sativa L.) is the only widely cultivated gramineous crops that cannot be infected by rust fungi. To decipher the molecular basis of rice nonhost resistance (NHR) to Puccinia striiformis f. sp. tritici (Pst), the causal agent of wheat stripe rust, proteomic analysis was performed using the two-dimensional electrophoresis (2-DE) technique. The expressed proteins from rice leaves 24 an...
A set of N-arylbenzenesulfonamides with various substituents at the arylamine and benzenesulfonyl positions were prepared, and their antifungal properties were measured in vitro against such plant pathogenic fungi as Pythium ultimum, Phytophthora capsici, Rhizoctonia solani, and Botrytis cinerea. Compounds 3, 4, 8, 9, 10, 14, 16, 18, 20, 21, 24 and 27 had antifungal activity over a broad spectr...
Fungal cells deal with a wide variety of toxic environmental conditions during their life cycle. An important example of stress challenge to which fungi must cope is the high levels of ROS produced by the host during the oxidative burst. Ustilago maydis (D.C.) Corda is an important model system for plant pathogen smut and rust fungi. Genome wide analyses of this pathogen provide an insight into...
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