It was found that A~2 isolates of Phytophthora drechsleri freshly isolated from diseased plants showed the ability to form oospores without being paired with A~1 type isolates.This ability declined as the isolate was stocked at 15℃ for a long time.The hetero- thallic features of P.drechsleri was stable except three isolates lost the mating ability during a long time storage.The reinfection of pathogen seemed having no effect on the restoration of homothallic behavior of P.drechsleri but has effect on the re...
【更新日期】
2006-08-10
【正文快照】
关于疫霉属真菌异宗配合的研究,美国(Burrett,1948;Cohen,x95o;Gallegly&Galindo,1 958;Johnson&Vallean,1954;Narasimhan,1930;Smoot et al.,1958),英国(StamPs,1958)等已有不少报道。我国在这方面研究不多。1980年我们对黄瓜疫霉病菌进行了研究,当时未得到疫霉属真菌有关种Al