| phytophthora alni sp. nov. and its variants: designation of emerging heteroploid hybrid pathogens spreading on alnus trees. | in 1993 a destructive new phytophthora pathogen of riparian alnus trees was discovered in the uk and subsequently shown to be present in other parts of europe. the new phytophthora comprised a group of emergent heteroploid hybrids, probably between p. cambivora and a species related to p. fragariae. these included a common, near tetraploid standard hybrid, the presumptive allopolyploid; and four scarcer major variant types with chromosome numbers intermediate between diploid and tetraploid, name ... | 2004 | 15535068 |
| distribution and expression of elicitin genes in the interspecific hybrid oomycete phytophthora alni. | phytophthora alni subsp. alni, p. alni subsp. multiformis, and p. alni subsp. uniformis are responsible for alder disease in europe. class i and ii elicitin gene patterns of p. alni subsp. alni, p. alni subsp. multiformis, p. alni subsp. uniformis, and the phylogenetically close species p. cambivora and p. fragariae were studied through mrna sequencing and 3' untranslated region (3'utr)-specific pcrs and sequencing. the occurrence of multiple 3'utr sequences in association with identical eliciti ... | 2007 | 17601812 |
| photosynthetic and leaf water potential responses of alnus glutinosa saplings to stem-base inoculaton with phytophthora alni subsp. alni. | three-year-old alnus glutinosa (l.) gaertn. (alder) saplings were single or double inoculated at the stem base with phytophthora alni subsp. alni brasier & s.a. kirk under natural climatic conditions. lesion formation on the bark showed a biphasic pattern of development, with extension occurring at a moderate rate in spring, and more rapidly during late summer. however, large variability was encountered in pathogen development within the population of infected saplings, ranging from high suscept ... | 2008 | 18765375 |