Study of the natural resistance towards apple proliferation disease and establishment of an in vitro resistance screening system in view of the development of resistant apple rootstocks [Elektronische Ressource] / presented by Claudia Bisognin

FACULTY OF AGRICULTURAL SCIENCES InstituteforSpecialCropCultivationandCropPhysiologyUniversityofHohenheimPDDr.GoetzReustleStudy of the natural resistance towards apple proliferation disease and establishment of an in vitro resistance screening system in view of the development of resistant apple rootstocks Dissertation Submittedinfulfilmentoftherequirementsforthedegree“DoktorderAgrarwissenschaften”(Dr.sc.agr./Ph.D.inAgriculturalSciences)totheFacultyofAgriculturalSciencespresentedbyClaudiaBisogninVicenza(Italy)2007Dateoforalexamination:28.11.2007Examination Committee Supervisor,ReviewerandExaminer PDDr.G.M.ReustleCo7ReviewerandExaminer Prof.Dr.G.WeberExaminer Prof.Dr.J.WünscheVice7DecanandHeadoftheCommittee Prof.Dr.W.Bessei 2 1.INTRODUCTION..................................................................................................................51.1APPLEPROLIFERATION..............................................................................................51.2SYMPTOMSANDECONOMICLOSSES.....................................................................51.3CANDIDATUSPHYTOPLASMAMALI ......................................................................71.3.1TaxonomicPosition......................................