| effects of culture media and environmental factors on mycelial growth and pycnidial production of potebniamyces pyri. | potebniamyces pyri (anamorph phacidiopycnis piri) is the causal agent of phacidiopycnis rot of apples and pears. the disease has recently been recognized in pears in the usa. little information on the basic biology of the fungus is available. in this paper, we report the effects of culture media, temperature, water potential and ph on mycelial growth, and the effects of media and light on pycnidia production. prune juice agar was the best for rapid mycelial growth. pear juice agar, apple juice a ... | 2004 | 15449598 |
| influence of nutrient and environmental factors on conidial germination of potebniamyces pyri. | abstract potebniamyces pyri is the causal agent of phacidiopycnis rot, a postharvest disease of pears. infection of fruit occurs in the orchard, and symptoms develop during storage. conidial germination of p. pyri in response to nutrient, temperature, wetness duration, relative humidity (rh), and ph was determined in vitro. conidia germinated by either budding or developing germ tubes in various concentrations of pear juice solutions. the mode of conidial germination was nutrient-dependent. low ... | 2005 | 18943324 |
| population structure of potebniamyces pyri in the u.s. pacific northwest and evidence of outcrossing inferred with sequence-characterized amplified region markers. | potebniamyces pyri is the cause of phacidiopycnis rot of d'anjou pear, which is grown primarily in washington and oregon. to estimate the population structure of p. pyri, 146 single-spore isolates were sampled from five major pear-production areas and scored for variation at eight sequence-characterized amplified region (scar) loci. significant genetic differentiation was detected among five subpopulations and a total of 54 multilocus genotypes were identified, with significant genotypic diversi ... | 2009 | 19351249 |