دورية أكاديمية

Evolutionary Relationships of the Dutch Elm Disease Fungus Ophiostoma novo-ulmi to Other Ophiostoma Species Investigated by Restriction Fragment Length Polymorphism Analysis of the rDNA Region.

التفاصيل البيبلوغرافية
العنوان: Evolutionary Relationships of the Dutch Elm Disease Fungus Ophiostoma novo-ulmi to Other Ophiostoma Species Investigated by Restriction Fragment Length Polymorphism Analysis of the rDNA Region.
المؤلفون: Pipe, N. D., Brasier, C. M., Buck, K. W.
المصدر: Journal of Phytopathology; Sep2000, Vol. 148 Issue 9/10, p533-539, 7p
مصطلحات موضوعية: DUTCH elm disease, OPHIOSTOMA, GENETIC polymorphisms, RNA
Abstract (English): Restriction fragment length polymorphisms (RFLPs) in the ribosomal RNA gene (rDNA) region were used to assess relationships between the Dutch elm disease fungi Ophiostoma novo-ulmi and Ophiostoma ulmi, the recently described Himalayan Dutch elm disease pathogen, Ophiostoma himal-ulmi, the morphologically similar sapstain fungi, Ophiostoma piceae and Ophiostoma quercus, and several Ophiostoma species from hardwood trees, including Ophiostoma stenoceras and Ophiostoma proliferum. A distance matrix and cluster analysis indicated that the rDNA region of O. himal-ulmi is more closely related to those of O. novo-ulmi and O. ulmi than to those of O. piceae and O. quercus and is more distantly related to O. stenoceras and the other Ophiostoma species, which formed a separate clade. The rDNA region of O. quercus was found to be at least as closely related to that of O. novo-ulmi and O. ulmi as it is to that of O. piceae. The implications of these results for the evolution of the Dutch elm disease fungi are discussed. [ABSTRACT FROM AUTHOR]
Abstract (German): Evolutionäre Beziehungen zwischen dem Erreger des Ulmensterbens Ophiostoma novo-ulmi und anderen Ophiostoma-Arten, untersucht durch RFLP-Analyse der rDNA-Region Anhand von Restriktionsfragmentlängenpolymorphismen (RFLPs) in der ribosomalen RNA-Gen(rDNA-)Region wurden die Beziehungen zwischen den Erregern des Ulmensterbens Ophiostoma novo-ulmi und Ophiostoma ulmi, dem vor kurzem beschriebenen Himalayischen Ulmensterbenerreger Ophiostoma himal-ulmi, den morphologisch sehr ähnlichen, den Pflanzensaft färbenden Arten Ophiostoma piceae und Ophiostoma quercus sowie verschiedenen Ophiostoma-Arten von Hartholzbäumen, darunter Ophiostoma stenoceras und Ophiostoma proliferum, untersucht. Eine Abstandsmatrix-und Clusteranalyse zeigte für die rDNA-Region, daß O. himal-ulmi mit O. novo-ulmi und O. ulmi näher verwandt ist als mit O. piceae und O. quercus, und daß O. himal-ulmi entfernter verwandt ist mit O. stenoceras und den übrigen Ophiostoma-Arten, die einen separaten Ast bildeten. Die rDNA-Region von O. quercus war mindestens so nahe verwandt mit derjenigen von O. novo-ulmi und O. ulmi wie mit derjenigen von O. piceae. Die Bedeutung dieser Ergebnisse für die Evolution der Erreger des Ulmensterbens wird diskutiert. [ABSTRACT FROM AUTHOR]
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قاعدة البيانات: Complementary Index
الوصف
تدمد:09311785
DOI:10.1046/j.1439-0434.2000.00556.x