Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Primary Studies on Biological Control of Grapevine Crown Gall by Rahnella aquatilis HX2
Ort / Verlag
ProQuest Dissertations & Theses
Erscheinungsjahr
2007
Link zum Volltext
Quelle
ProQuest Dissertations & Theses A&I
Beschreibungen/Notizen
Crown gall induced by Agrobacterium vitis is a worldwide plant disease of great economic importance in grape-growing regions. The strain HX2 serves as a potential biological control agent against grapevine crown gall. This dissertation focus on antagonistic activity on crown gall by strain HX2 and its biocontrol mechanisms. The strain HX2 exhibited a broad spectrum of inhibition activity against phytopathogenic bacteria and fungi, especially for Agrobacterium spp. Results in greenhouse suggested that it is an effective strain to control crown gall. The sensitivity of A. vitis K308 to HX2 was evaluated in planta with intact grapevines. The result indicated that HX2 could reduce the crown gall symptoms. The ability of HX2 to inhibit gall formation caused by A. vitis K308 was also assessed under field conditions. Treatment with HX2 gave a significant decrease in the disease incidence and disease severity index. The biocontrol index for HX2 was up to 80.2%. The strain HX2 was identified as Rahnella aquatilis base